246015692 FORD New Holland 8670 8770 8870 8970 WSM

00-1
Tractor Identification 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Techniques 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sealer Specifications 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

00-2
FOREWORD
Appropriate service methods and correct repair procedures are essential for the safe, reliable operation of all equipment, as well as the personal safety of the individual performing the repair.
This Service Manual provides troubleshooting, overhaul, and pressure-testing instructions using recommended procedures and equipment. Following these instructions will ensure the safe, efficient, and timely completion of the service or repair.
There are numerous variations in procedures, techniques, tools, and parts for servicing machines, as well as in the skill of the individual doing the work. This manual cannot possibly anticipate all such variations and provide advice or cautions as to each. Accordingly, anyone who departs from the instructions provided in this manual must first establish that their personal safety, the safety of others, and the integrity of themachine will not be com- promised by the choice of methods, tools or parts.
The manual is divided into sections which are subdivided into chapters. Each chapter contains information on general operating principles, detailed inspection, overhaul and, where applicable, specific troubleshooting, special tools, and specifications.
Any reference in this manual to right, left, rear, front, top, or bottom is as viewed from the operator’s seat, looking forward.

00-3
PRECAUTIONARY STATEMENTS
PERSONAL SAFETY
Throughout this manual and on machine decals, you will find precautionary statements (“CAUTION”, “WARNING”,and“DANGER”) followed by specific instructions. These precautions are intended for the personal safety of you and those working with you. Please take the time to read them.
CAUTION
The word “CAUTION” is used where a safe behavioral practice according to operating and maintenance instructions and common safety practices will protect the operator and others from accident involvement.
WARNING
The word “WARNING” denotes a potential or hidden hazard which has a potential for serious injury. It is used to warn operators and others to exercise every appropriate means to avoid a surprise involvement with machinery.
DANGER
The word “DANGER” denotes a forbidden practice in connection with a serious hazard.
FAILURE TO FOLLOW THE “CAUTION”, “WARNING”, AND “DANGER” INSTRUCTIONS MAY RESULT IN SERIOUS BODILY INJURY OR DEATH.
MACHINE SAFETY
Additional precautionary statements (“ATTENTION” and “IMPORTANT”) are followed by specific instructions. These statements are intended for machine safety.
ATTENTION: The word “ ATTENTION ” is used to warn the operator of potential machine damage if a certain procedure is not followed.

00-4
SAFETY PRECAUTIONS
Practically all service work involves the need to drive the tractor. The operator’s manual, supplied with each tractor, contains detailed safety precautions relating to driving, operating, and servicing that tractor. These precautions are as applicable to the service technician as they are to the operator and should be read, understood and practiced by all personnel.
Prior to undertaking any maintenance, repair, overhaul, dismantling or reassembly operations, whether within a workshop facility or in the field, consideration should be given to factors that may have an effect upon safety, not only upon the mechanic carrying out the work, but also upon bystanders.
PERSONAL CONSIDERATIONS
The wrong clothes or carelessness in dress can cause accidents. Check to see that you are suitable clothed.
Some jobs require special protective equipment.
Skin Protection Used motor oil may cause skin cancer. Follow work practices that minimize the amount of skin exposed and length of time used oil stays on your skin.
Eye Protection The smallest eye injury may cause loss of vision. Injury can be avoided by wearing eye protection when engaged in chiselling, grinding, discing, welding, and painting.
Breathing Protection Fumes, dust, and paint spray are unpleasant and harmful. These can be avoided by wearing respiratory protection.
Hearing Protection Loud noise may damage your hearing, and the greater the exposure the worse the damage. If the noise is excessive, wear ear protection.
Lifting Protection Avoid injury by correctly handling components. Make sure you are capable of lifting the object. If in doubt get help.
Hand Protection It is advisable to use a protective cream before work to prevent irritation and skin contamination. After work clean your hands with soap and water. Solvents such as mineral spirit and kerosene may harm the skin.
Foot Protection Substantial or protective footwear with reinforced toe caps will protect your feet from falling objects. Additionally, oil-resistant soles will help to avoid slipping.
Special Clothing For certain work it may be necessary to wear flame or acid-resistant clothing.
EQUIPMENT CONSIDERATIONS
Machine Guards Before using any machine, check to ensure that the machine guards are in position and serviceable. These guards not only prevent parts of the body or clothing coming in contact with the moving parts of the machine, but also ward off objects that might fly off the machine and cause injury.
Lifting Devices Always ensure that lifting equipment, such as chains, slings, lifting brackets, hooks and eyes, are thoroughly checked before use. If in doubt, select stronger equipment than is necessary.
Never stand under a suspended load or raised implement.
Compressed Air The pressure from a compressed-air line often exceeds 690 bar (100 PSI). It is perfectly safe if used correctly. Any misuse may cause injury.
Never use compressed air to blow dust, filing, anddirt away from your work area unless the correct type of nozzle is fitted.

00-5
Hand Tools Many cuts, abrasions and injuries are caused by defective tools. Never use the wrong tool for the job, as this generally leads either to some injury or to a poor job.
When removing or replacing hardened pins, use a copper or brass drift rather than a hammer.
For dismantling, overhaul, and assembly of major and sub-components, always use the Special Service Tools recommended. These will reduce the work effort, labor time, and the repair cost.
Electricity Electricity has become so familiar in day to day usage, that its potentially dangerous properties are often overlooked. Misuse of electrical equipment can endanger life.
Before using any electrical equipment - particularly portable appliances - make a visual check to make sure that the wiring is not worn or frayed and that the plugs and sockets are intact. Make sure you know where the nearest isolating switch for your equipment is located.
GENERAL CONSIDERATIONS
Solvents Use cleaning fluids and solvents that are known to be safe. Certain types of fluids can cause damage to components, such as seals, and can cause skin irritation. Solvents should be checked that they are suitable not only for the cleaning of components and individual parts, but also that they do not affect the personal safety of the user.
Housekeeping Many injuries result from tripping over or slipping on objects or material left lying around by a careless worker. Prevent these accidents from occurring. If you notice a hazard, don’t ignore it - remove it.
A clean, hazard-free place of work improves the surroundings and daily environment for everybody.
Fire Fire has no respect for persons or property. The destruction that a fire can cause is not always fully realized. Everyone must be constantly on guard.
Extinguish matches, cigars, and cigarettes before throwing them away.
Work cleanly, disposing of waste material into proper containers.
Locate the fire extinguishers and find out how to operate them.
Do not panic - warn those near and raise the alarm.
Do not allow or use an open flame near the tractor fuel tank, battery, or component parts.
First Aid In the type of work that mechanics are engaged in, dirt, grease, and fine dusts settle upon the skin and clothing. If a cut, abrasion or burn is disregarded it may become infected within a short time. Seek medical aid immediately.
Cleanliness Cleanliness of the tractor hydraulic system is essential for optimum performance. When carrying out service and repairs, plug all hose ends and component connections to prevent dirt entry.
Clean the exterior of all components before carrying out any form of repair. Dirt and abrasive dust can reduce theefficiency and working life of a component and lead to costly replacement. Use of a high-pressure washer or steam cleaner is recommended.
OPERATIONAL CONSIDERATIONS
Stop the engine, if at all possible, before performing any service.
Place a warning sign on tractors which, due to service or overhaul, would be dangerous to start. Disconnect the battery leads if leaving such a unit unattended.
Do not attempt to start the engine while standing beside the tractor or attempt to bypass the safety start switch.
Avoid prolonged running of the engine in a closed building or in an area with inadequate ventilation as exhaust fumes are highly toxic.
Always turn the radiator cap to the first stop to allow pressure in the system to dissipate when the coolant is hot.

00-6
If it is found necessary to raise the tractor for ease of servicing or repair, make sure that safe and stable supports are installed beneath axle housings, casings, etc., before starting work.
Certain repair or overhaul procedures may necessi- tate separating the tractor, either at the engine/transmission or transmission/rear axle location. These operations are simplified by the use of the Tractor Splitting Stands. Should this equipment not be available, every consideration must be given to stability, balance and weight of the components, especially if a cab is installed.
Use footsteps or working platforms when servicing those areas of a tractor that arenot withineasy reach.
Before loosening any hoses or tubes connecting implements to remote control valves, etc., switch off the engine, remove all pressure in the lines by operating levers several times. This will remove the danger of personal injury by oil pressure.
Prior to pressure testing, make sure all hoses and connectors of the tractor and the test equipment are in good condition and tightly sealed. Pressure readings must be taken with the gauges specified. The correct procedure should be rigidly observed to prevent damage to the system or the equipment, and to eliminate the possibility of personal injury.
WARNING
Escaping hydraulic/diesel fluid under pressure can penetrate the skin causing serious injury.
Do not use your hand to check for leaks. Use a piece of cardboard or paper to search for leaks.
Stop the engine and relieve pressure before connecting or disconnecting lines.
Tighten all connections before starting the engine or pressurizing lines.
If any fluid is injected into the skin, obtain medical attention immediately or gangrene may result.
Use “position control” when equipment or implements are required to be attached to the hydraulic linkage either for testing purposes or for transporta- tion.
Always lower equipment to the ground when leaving the tractor.
If high lift attachments are installed on a tractor, beware of overhead power, electric or telephone cables when traveling. Drop the attachment near to ground level to increase stability and minimize risks.
Do not park or attempt to service a tractor on an incline. If unavoidable, take extra care and block all wheels.
Observe recommended precautions as indicated in this Service Manual when dismantling the air- conditioning system as escaping refrigerant can cause frostbite.
Prior to removing wheels and tires from a tractor, check to determine whether additional ballast (liquid or weights) has been added. Seek assistance and use suitable equipment to support the weight of the wheel assembly.

00-7
HEALTH AND SAFETY PRECAUTIONS
Many of the procedures associated with vehicle maintenance and repair involve physical hazards or other risks to health. This section lists, alphabetically, some of these hazardous operations, materials and equipment associated with them. The precautions necessary to avoid these hazards are identified.
The list is not inclusive; all operations, procedures, and handling of materials should be carried out with health and safety in mind.
ACIDS AND ALKALIS (See Battery Acids, i.e., Caustic Soda, Sulfuric Acid)
Used in batteries and cleaning materials.
Irritating and corrosive to the skin, eyes, nose and throat. Causes burns.
Avoid splashes to the skin, eyes, and clothing. Wear suitable protective gloves and goggles. Can destroy ordinary protective clothing. Do not breathe mists.
Ensure access to water and soap is readily available for splashing accidents.
ADHESIVES AND SEALERS (See Fire)
CAUTION
HIGHLY FLAMMABLE, COMBUSTIBLE.
Generally should be stored in “NO SMOKING” areas; cleanliness and tidiness while in use should be observed, i.e., from applications where possible, disposable paper should be dispensed to cover benches. Containers, including secondary containers, should be labeled.
Solvent-Based Adhesives/Sealers (See Solvents) Follow manufacturer’s Instructions
Water-Based Adhesives/Sealers Those based on polymer emulsions and rubber lattices may contain small amounts of volatile toxic and harmful chemicals.
Skin and eye contact should be avoided, and adequate ventilation provided during use.
Follow manufacturer’s Instructions
Resin-Based Adhesive/Sealers (i.e., Epoxide and Formaldehyde Resin Based) Mixing should only be carried out in well- ventilated areas as harmful or toxic volatile chemicals may be released.
Skin contact with uncured resins and hardeners can result in irritation, dermatitis, and absorption of toxic, or harmful chemicals through the skin. Splashes can damage the eyes.
Provide adequate ventilation; avoid skin and eye contact. Follow manufacturer’s instructions.
Anaerobic, Cyanoacrylate and other Acrylic Adhesives Many are irritating, sensitizing, or harmful to the skin. Some are eye irritants.
Skin and eye contact should be avoided and the manufacturer’s instructions followed.
Cyanoacrylate adhesives (super-glues) must not contact the skin or eyes. If skin or eye tissue is bonded, cover with a clean moist pad and get medical attention. Do not attempt to pull tissue apart. Use in well-ventilated areas as vapors can cause irritation of the nose and eyes.
For two-part systems: See Resin-Based Adhesive/ Sealers
Isocyanate (Polyurethane) Adhesive/Sealers (See Resin-Based Adhesives) Individuals suffering from asthma or respiratory allergies should not work with, or near, these materials as sensitivity reactions can occur.
Any spraying should preferably be carried out in exhaust ventilated booths removing vapors and spray droplets from the breathing zone. Individuals working with spray applications should wear supplied air respirators.
ANTIFREEZE (See Fire, Solvents, i.e., Isopropanol, Ethylene Glycol, Methanol)
CAUTION

00-8
Vapors given off from coolant antifreeze (Glycol) arise only when heated.
Antifreeze may be absorbed through the skin in toxic or harmful quantities. Swallowed antifreeze is fatal if not treated; medical attention must be sought immediately.
BATTERY ACIDS (See Acids and Alkalis)
Gases released during charging are explosive. Never use an open flame or allow sparks near charging or recently charged batteries.
BRAKE AND CLUTCH LININGS AND PADS (See Legal Aspects)
These items may contain asbestos which, if inhaled, may cause lung damage and, in some cases,cancer.
The normal handling and fitting of these items should not cause any hazard, but any drilling, grinding, or filling of friction materials may produce asbestos dust and should only be carried out under strictly controlled conditions.
The dust in brake drums, etc., contains very little asbestos, but care should be taken to avoid inhalation of this dust during servicing of brakes and clutches. The use of drum cleaning units, vacuum cleaning, or damp wiping is preferred to the use of air jets for “blowing-out.”
The dust should be collected in a sealed plastic bag and disposed appropriately, according to local laws and regulations.
BRAZING (See Welding)
CHEMICAL MATERIALS - GENERAL (See Legal Aspects)
Chemical materials such as solvents, sealers, adhesives, paints, resin foams, battery acids, antifreeze, oils, and grease should always be used with caution, stored andhandled with care. They may be toxic, harmful, corrosive, irritating, or highly flammable, causing hazardous fumes and dusts.
The effects of excessive exposure to chemicals may be immediate or delayed, briefly experienced or permanent, cumulative, superficial, life threatening, or may reduce life expectancy.
CLUTCH LININGS AND PADS (See Brake and Clutch Linings and Pads)
CORROSION PROTECTION MATERIALS (See Solvents, Fire)
CAUTION
These materials are varied; the manufacturer’s instructions should be followed. They may contain solvents, resins, and petroleum products. Skin and eye contact should be avoided. They should only be sprayed in conditions of adequate ventilation, and not in confined spaces.
CUTTING (See Welding)
DO’S
Do remove chemical materials from the skin and clothing as soon as practicable. Change heavily soiled clothing and have it cleaned.
Do carefully read and observe hazard and precaution warnings given on material containers (labels) and in any accompanying leaflets, poster or other instructions. Material health and safety data sheets can be obtained from manufacturers.
Do organize work practices by wearing protective clothing and safety devices to avoid contact with chemical materials; breathing vapors, aerosols, dusts, and fumes; inadequate container labeling; or fire and explosion hazards.
Do wash before job breaks, before eating, smoking, drinking, or using toilet facilities when handling chemical materials.
Do keep work areas clean, uncluttered, and free of spills.
Do store according to national and local regulations.
Do keep chemical materials out of reach of children.
DON’TS
Do not mix chemical materials except under the manufacturer’s instructions; some chemicals can form other toxic or harmful chemicals, releasing toxic or harmful fumes, or be explosive when mixed together.

00-9
Do not apply heat or flame to chemical materials, except under the manufacturer’s instructions. Some are highly flammable, and some may release toxic or harmful fumes.
Do not leave containers open. Escaping fumes can build up to toxic, harmful, or explosive concentrations. Some fumes are heavier than air and will accumulate in confined areas, pits, etc.
Do not transfer chemical materials to unlabeled containers.
Do not clean hands or clothing with chemical materials. Chemicals, particularly solvents and fuels, will dry the skin, and may cause irritation with dermatitis. Some can be absorbed through the skin in toxic or harmful quantities.
Do not use emptied containers for other materials, except when they have been cleaned under supervised conditions.
Do not sniff or smell chemical materials. Brief exposure to high concentrations of fumes can be harmful or toxic.
DUSTS
Powder or dusts may be an irritant, harmful or toxic. Avoid breathing dusts from powdery chemical materials, or those arising from dry abrasion operations. Wear respiratory protection if ventilation is inadequate.
ELECTRIC SHOCK
Electric shocks can result from the use of faulty electrical equipment or from the misuse of equipment even in good condition.
Ensure electrical equipment is maintained in good condition and frequently tested.
Ensure flexes, cables, plugs and sockets are not frayed, kinked, cut, cracked, or otherwise damaged.
Ensure electric equipment is protected by the correct rated fuse.
Never use electrical equipment or any other equipment which is in any way faulty. The results could be fatal.
Use reduced voltage equipment for inspection and working lights, where possible.
Ensure the cables of mobile electrical equipment cannot get trapped and damaged, such as in a vehicle hoist.
In Cases of Electrocution:
! Switch off electricity before approaching victim.
! Ifthis is not possible, push or drag the victim from the source of electricity using dry non-conductive material.
! Commence resuscitation if trained to do so.
! SUMMON MEDICAL ASSISTANCE IMMEDIATELY
EXHAUST FUMES
These contain asphyxiating, harmful and toxic chemicals, and particles such as carbon oxides, nitrogen oxides, aldehydes, lead, and aromatic hydrocarbons. Engines should only run under conditions of adequate extraction, or general ventilation, not in confined spaces.
Diesel Engine Soot, discomfort, and irritation usually give adequate warning signs of hazardous fume concentration.
FIBER INSULATION (See Dusts)
Used in noise and sound insulation.
The fibrous nature of surfaces and cut edge can cause skin irritation. This is usually a physical, not a chemical effect.
Precautions should be taken to avoid excessive skin contact through careful organization of work practices and the use of gloves.
FIRE (See Welding, Foams, Legal Aspects)
Many of the materials found on, or associated with, the repair of vehicles are highly flammable. Some release toxic or harmful fumes if burned.
Observe strict fire safety when storing and handling flammable materials or solvents, particularly near electrical equipment or welding processes.
Before using electrical or welding equipment, be sure there is no fire hazard present.

00-10
FIRST AID
Apart from meeting any legal requirements, it is desirable for someone in the workshop to be trained in first aid procedures.
Splashes in the eye should be flushed with clean water for at least ten minutes.
Soiled skin should be washed with soap and water.
Inhalation affected individuals should be removed to fresh air immediately.
If chemicals are swallowed, consult a doctor immediately with (label) information on material used.
Do not induce vomiting, unless indicated by manufacturer.
FOAMS - POLYURETHANE (See Fire)
Used in sound and noise insulation. Cured foams are used in seat and trim cushioning.
Follow manufacturer’s instructions.
Unreacted components are irritating and may be harmful to the skin and eyes. Wear gloves and goggles.
Individuals with chronic respiratory diseases, asthma, bronchial medical problems, or histories of allergic diseases should not work with or near uncured materials.
The component’s vapors and spray mists can cause direct irritation and/or sensitivity reactions and may be toxic or harmful.
Vapors andspray mists must not be breathed. These materials must be applied with adequate ventilation and respiratory protection. Do not remove respirator immediately after spraying, wait until vapor/mists have cleared.
Burning of the uncured components and the cured foams can generate toxic and harmful fumes.
Smoking, open flames, or the use of electrical equipment should not be allowed during foaming operations until vapors/mists have completely cleared. Any heat cutting of cured foams or partially cured foams should be conducted with extraction ventilation (see Legal Aspects).
FUELS (See Fire, Legal Aspects, Chemicals - General, Solvents)
Used as fuels and cleaning agents.
Gasoline (Petrol)
Swallowing can result in mouth and throat irritation; absorption from the stomach can result in drowsiness and unconsciousness. Small amounts can be fatal to children. Aspiration of liquid into the lungs, i.e., through vomiting,is a very serious hazard.
Prolonged or repeated contact with gasoline dries the skin and causes irritation and/or dermatitis. Liquid in the eye causes severe pain.
Motor gasoline may contain high quantities of benzene which is toxic upon inhalation; the concentrations of gasoline vapors must be kept very low. High concentrations will cause eye, nose and throat irritation, nausea, headache, depression and symptoms of drunkenness. Very high concentrations will result in rapid loss of consciousness.
Ensure there is adequate ventilation when handling and using gasoline. Great care must be taken to avoid the serious consequences of inhalation in the event of vapor buildup arising from spillages in confined spaces.
Special precautions apply to cleaning and maintenance operations on gasoline storage tanks.
Gasoline should not be used as a cleaning agent. It must not be siphoned by mouth.
Kerosene (Paraffin) Used also as heating fuel, solvent, and cleaning agent.
CAUTION
FLAMMABLE
Irritation of the mouth and throat may result from swallowing. The main hazard from swallowing arises if liquid aspiration into the lungs occurs. Liquid contact dries the skin and can cause irritation and/or dermatitis. Splashes in the eye may be slightly irritating.

00-11
CAUTION
COMBUSTIBLE
Gross or prolonged skin contact with high boiling gas oils may cause serious skin disorders, including skin cancer.
GAS CYLINDERS (See Fire)
Gases such as oxygen, acetylene, carbon dioxide, argon, and propane are normally stored in cylinders at pressures of up to 137.8 bar (2000 PSI). Great care should be taken in handling these cylinders to avoid mechanical damage to them or the valve gear attached. The contents of each cylinder should be clearly identified by appropriate markings.
Cylinders should be stored in well-ventilated enclosures and protected from ice, snow, or direct sunlight. Fuel gases, i.e., acetylene and propane, should not be stored in close proximity to oxygen cylinders.
Care should be exercised to prevent leaks from gas cylinders and lines and to avoid sources of ignition.
Only trained personnel should undertake work involving gas cylinders.
GASES (See Gas Cylinder)
GAS WELDING (See Welding)
GENERAL WORKSHOP TOOLS AND EQUIPMENT
It is essential that all tools and equipment are maintained in good condition and the correct safety equipment used where required.
Never use tools or equipment for any purpose other than for which they were designed.
Never overload equipment such as hoists, jacks, axle and chassis stands, or lifting slings. Damage caused by overloading is not always immediately apparent and may result in a fatal failure the next time the equipment is used.
Do not use damaged, defective tools or equipment, particularly high-speed equipment such as grinding wheels. A damaged grinding wheel can disintegrate without warning causing serious injury.
Wear suitable eye protection when using grinding, chiseling, or sandblasting equipment.
Wear a suitable breathing mask when using sandblasting equipment, working with asbestos based materials, or using spraying equipment.
GLUES (See Adhesive and Sealers)
HIGH-PRESSURE AIR, LUBRICATION AND OIL TEST EQUIPMENT (See Lubricants and Greases)
Always keep high-pressure equipment in good condition and regularly maintained, particularly joint and unions.
Never direct a high-pressure nozzle at the skin, as the fluid may penetrate to the underlying tissue and can cause serious injury.
LEGAL ASPECTS
Many laws and regulations make requirements relating to health and safety in the use of materials and equipment in workshops.
Workshops should be familiar, in detail, with these laws and regulations.
LUBRICANTS AND GREASES
Avoid all prolonged and repeated contact with mineral oils, especially used oils. Gross and prolonged skin contact with used oils contaminated during service, i.e., routine service change sump oils, are more irritating and more likely to cause serious effects, including skin cancer.
Wash skin thoroughly after work involving oil. Proprietary hand cleaners may be of value provided they can be removed from the skin with water. Do not use petrol, paraffin, or other solvents to remove oil from the skin.
Lubricants and greases may be slightly irritating to the eyes.
Repeated or prolonged skin contact should be avoided by wearing protective clothing, if necessary. Particular care should be taken with used oils and greases containing lead. Do not allow work clothing to be contaminated with oil. Dry clean or launder such clothing at regular intervals. Discard oil-soaked shoes.

00-12
CAUTION
HIGHLY FLAMMABLE
Paints can contain harmful or toxic pigments, driers, and other components, as well as solvents. Spraying should only be carried out with adequate ventilation.
Two-part or catalyzed paints can also contain harmful and toxic unreacted resins and resin-hard- ening agents. The manufacturer’s instructions should be followed and the section on resin-based adhesives, isocyanate containing adhesive and foams should be consulted.
Spraying should preferably be carried out in exhausted ventilated booths, removing vapor and spray mists from the breathing zone. Individuals working in booths should wear respiratory protection. Those doing small-scale repair work in the open shop should wear supplied air respirators.
PAINT THINNERS (See Solvents)
PRESSURIZED EQUIPMENT (See High- Pressure Air, Lubrication and Oil Test Equipment)
RESISTANCE WELDING (See Welding)
SOLDER (See Welding)
Solders are mixtures of metals in which the melting point of themixture is below that of constituent metals (normally lead and tin). Solder application does not normally give rise to toxic lead fumes, provided a gas/air flame is used. Oxyacetylene flames should not be used, as they are much hotter and will cause lead fumes to be released.
Some fumes may be produced by the application of any flame to surfaces coated with grease, etc., and inhalation of these should be avoided.
Removal of excess solder should be undertaken with care to ensure fine lead dust is not produced, which can cause toxic effects if inhaled. Respiratory protection may be necessary.
Solder spillage and filing should be collected and removed promptly to prevent general air contamination by lead.
High standards of personal hygiene are necessary in order to avoid ingestion of lead or inhalation of solder dust from clothing.
SOLVENTS (See Chemical Materials - General, Fuels [Kerosene], Fire)
Acetone, White spirit, Toluene, Xylene, Trichlore- thane.
Used in cleaning materials, dewaxing, paints, plastics, resins, thinners, etc.
CAUTION
HIGHLY FLAMMABLE
Skin contact will degrease the skin and may result in irritation and/or dermatitis following repeated or prolonged contact. Some can be absorbed through the skin in toxic or harmful quantities.
Splashes in the eye may cause severe irritation and could lead to loss of vision.
Brief exposure to high concentrations of vapors or mists will cause eye and throat irritation, drowsiness, dizziness, headaches and, in the worst circum- stances, unconsciousness.
Repeated or prolonged exposures to excessive, but lower concentrations of vapors or mists, for which there might not be adequate warning indications, can cause more serious toxic or harmful effects. Aspiration into the lungs, i.e., through vomiting, is the most serious consequence.
Avoid splashes to the skin, eyes, and clothing. Wear protective gloves, goggles, and clothing if necessary.
Ensure good ventilation when in use, avoid breathing fumes, vapors, and spray mists. Keep containers tightly sealed. Do not use in confined spaces.
When the spraying material contains solvents, e.g., paints, adhesives, and coatings, use extraction ventilation or personal respiratory protection in the absence of adequate general ventilation.

00-13
SPOT WELDING (See Welding)
SUSPENDED LOADS
There is always a danger when loads are lifted or suspended. Never work under an unsupported, suspended, or raised load, e.g., jacked-up vehicle, suspended engine, etc.
Always ensure lifting equipment such as jacks, hoists, axle stands, slings, etc., are adequate and suitable for the job, in good condition, and regularly maintained.
Never improvise lifting tackle.
WELDING (See Fire, Electric Shock, Gas Cylinders)
Welding processes include Resistance Welding (Spot Welding), Arc Welding, and Gas Welding.
Resistance Welding This process may cause particles of molten metal to be emitted at high velocity; the eyes and skin must be protected.
Arc Welding This process emits a high level of ultraviolet radiation which may cause eye and skin burns to the welder and to other persons nearby. Gas-shielded welding processes are particularly hazardous in this respect. Personal protection must be worn and screens used to shield other people.
Metal spatter will also occur; appropriate eye and skin protection is necessary.
The heat of the welding arc will produce fumes and gases from the metals being welded and from any
applied coatings or contamination of the surfaces being worked on. These gases and fumes may be toxic; inhalation should always be avoided. The use of extraction ventilation to remove the fumes from the working area may be necessary, particularly in cases where the general ventilation is poor, or where considerable welding work is anticipated. In extreme cases where adequate ventilation cannot be provided, supplied air respirators may be necessary.
Gas Welding Oxyacetylene torches may be used for welding and cutting; special care must be taken to prevent leakage of these gases, subsequently reducing the risk of fire and explosion.
The process will produce metal spatter; eye and skin protection is necessary.
The flame is bright and eye protection should be used, but the ultraviolet emission is much less than that from arc welding, and lighter filters may be used.
The process itself produces few toxic fumes, but such fumes and gases may be produced from coatings on the work, particularly during cutting away of damaged parts. Inhalation of the fumes should be avoided.
In brazing, toxic fumes may be released from the metals in the brazing rod. A severe hazard may arise if brazing rods containing cadmium are used. In this event, particular care must be taken to avoid inhalation of fumes; an expert’s advice may be required.
SPECIAL PRECAUTIONS MUST BE TAKEN BEFORE ANY WELDING OR CUTTING TAKES PLACE ON VESSELS WHICH HAVE CONTAINED COMBUSTIBLE MATERIALS, I.E., “BOILING” OR “STEAMING OUT” THE INSIDE OF FUEL TANKS.
WHITE SPIRIT (See Solvents)
00-14
TRACTOR IDENTIFICATION DATA
The tractor and major components are identified using serial numbers and/or manufacturing codes. The following provides the locations of the identification data.
NOTE: Tractor identification data must be supplied when requesting parts or service.
Identification data is needed to aid in identifying the tractor if it is ever stolen.
VEHICLE IDENTIFICATION PLATE
The vehicle identification plate on the 70 Series, is located inside the right front lower side panel of the hood at 1.
The vehicle identification plate on the 70A Series, is located inside the upper right side panel of the hood at 2.
Owners should record the information on the sample ID plate.
70-340-31
1
TRACTOR NUMBER - Serial numberprefixed by the letter “D.”
MODEL - Production model code.
ENGINE - Serial number.
TRANSMISSION - Serial number.
FRONT AXLE - Serial number.
HYDRAULIC PUMP - Serial number.
00-15
*KEY TO PRODUCTION DATE CODES:
The unit heading on the ID plate represents the production date of the tractor.
Two types of production date codes are used. One style starts with a numeral (example 4A03B) while the second style starts with a letter (example A0314).
The following examples explain each code. Refer to the style code used on the tractor being worked on.
Example of Production Unit Code 4A03B:
4 = Year of production (4 = 1994, 5 = 1995)
A = Month of year (A = January, B = February, ... H = August, J = September, ... M = December) NOTE: “I” is not used.
03 = Day of month (03 = third, 04 = fourth, ... 31 = thirty-first)
B = Shift (A = night, B = day, C = afternoon)
Example of Production Unit Code A0314:
A = Month of year (A = January, B = February, ... H = August, J = September, ... M = December) NOTE: “I” is not used.
03 = Day of month (03 = third, 04 = fourth, ... 31 = thirty-first)
1 = Shift (1 = day, 2 = afternoon, 3 = night)
4 = Year of production (4 = 1994, 5 = 1995)
TRACTOR IDENTIFICATION STAMPING
The serial number and identification information, 1, is stamped on the top of the front support.
70-340-32
4
00-16
FOUR WHEEL DRIVE (FWD) FRONT AXLE IDENTIFICATION
The serial number and axle type for the 70 Series is on the plate, 1, located on the front of the axle housing.
70-340-34
5
The serial number and axle type for the 70A Series is on the plate located on the right rear of the axle housing, 2.
10001277
2
6
00-17
ENGINE IDENTIFICATION
The engine identification information for the 70 Series, is located on a tag, 1, on the right side of the engine rocker cover.
70-340-33
7
The engine identification information for the 70A Series, is located on a tag, 2, on the top front of the engine rocker cover.
70-340-33
2
8
NOTE: 70 Series art shown in Figure 9.
The serial number and pump information are on the plate, 1, on the pump.
NOTE: The plate location differs slightly for all the models.
70-340-2194
9
00-18
! 011 = Factory code (Germany)
! 0400876405 = Supplier order number
! PES6A95D410RS2835 = Alphanumeric production designation
S = Flange-mounted
6 = Number of cylinders
A = Size pump (A - 8670 and 8770, P - 8870 and 8970)
95 = Plunger diameter in 1/10 mm (915 mm)
D = Pump model (“D” is the latest version of “A” size pumps)
410 = Number code for location of feed pump and governor
R = Rotation of pump as seen from drive end (right hand = clockwise)
S2835 = Application number (indicates what model New Holland tractor this is used on)
70-340-2195
10
STARTER MOTOR IDENTIFICATION
The serial number and starter information are on the plate, 1, on the starter housing.
70-340-2196
11
TRANSMISSION IDENTIFICATION
The serial number and type are located on the plate, 1, on the lower right side of the transmission.
70-340-36
12
00-19
TANDEM GEAR PUMP IDENTIFICATION
The serial number and pump identification information are on the plate, 1, on the pump housing.
70-340-2197
13
AXIAL PISTON PUMP IDENTIFICATION
The serial number and pump identification information are on the plate, 1, on the pump housing next to the case drain port.
70-340-2198
14
REAR AXLE IDENTIFICATION
The serial number, 1, is stamped on the left side of the PTO boss on the rear axle housing.
70-340-37
15
00-20
CAB IDENTIFICATION
The serial number is on the certification plate, 1, on the rear crossbar.
70-640-38
16
00-21
GENERAL
Clean the exterior of all components before carrying out any form of repair. Dirt and abrasive dust can reduce the efficient working life of a component and lead to costly replacement.
Time spent on the preparation and cleanliness of working surfaces will pay dividends in making the job easier and safer and will result in overhauled components being more reliable and efficient in operation.
Use cleaning fluids which are known to be safe. Certain types of fluid can cause damage to O rings andcause skinirritation. Solvents should be checked that they are suitable for the cleaning of components and also that they do not risk the personal safety of the user.
Replace O rings, seals or gaskets whenever they are disturbed. Never mix new and old seals or O rings, regardless of condition. Always lubricate new seals and O rings with hydraulic oil before installation.
When replacing component parts, use the correct tool for the job.
HOSES AND TUBES
Always replace hoses and tubes if the cone end or the end connections on the hose are damaged.
When installing a new hose, loosely connect each end and make sure the hose takes up the designed position before tightening the connection. Clamps
should be tightened sufficiently to hold the hose without crushing and to prevent chafing.
After hose replacement to a moving component, check that the hose does not foul by moving the component through the complete range of travel.
Be sure any hose which has been installed is not kinked or twisted.
Hose connections which are damaged, dented, crushed or leaking, restrict oil flow and the productivity of the components being served. Connectors which show signs of movement from the original swaged position have failed and will ultimately separate completely.
A hose with a chafed outer cover will allow water entry. Concealed corrosion of the wire reinforcement will subsequently occur along the hose length with resultant hose failure.
Ballooning of the hose indicates an internal leakage due to structural failure. This condition rapidly deteriorates and total hose failure soon occurs.
Kinked, crushed, stretched or deformed hoses generally suffer internal structural damage whichcan result in oil restriction, a reduction in the speed of operation and ultimate hose failure.

00-22
O RING FLAT FACE SEAL FITTINGS
When repairing O ring face seal connectors, the following procedures should be observed.
WARNING
Never disconnect or tighten a hose or tube that is under pressure. If in doubt, actuate the operating levers several times with the engine switched off prior to disconnecting a hose or tube.
1. Release the fittings and separate the hose or tube assembly, then remove and discard the O ring seal from the fitting.
2. Dip a new O ringseal intoclean hydraulic oil prior to installation. Install a new O ring into the fitting and, if necessary, retain in position using petroleum jelly.
3. Assemble the new hose or tube assembly and tighten the fitting finger tight, while holding the tube or hose assembly to prevent it from turning.
4. Use two suitable wrenches and tighten the fitting to thespecified torque according to thesize of the fitting. Refer to the following torque chart.
NOTE: To ensure a leak-free joint is obtained, it is important that the fittings are not over or under torqued.
O RING FLAT FACE SEAL FITTING TORQUE VALUES
NOMINAL TUBE O.D DASH SIZE THREAD SIZE SWIVEL NUT TORQUE
(mm) (in.) (in.) Nám Ft. Lbs.
6.35 0.250 -4 9/16-18 16 12
9.52 0.375 -6 11/16-16 24 18
12.70 0.500 -8 13/16-16 50 37
15.88 0.625 -10 1-14 69 51
19.05 0.750 -12 1 3/16-12 102 75
22.22 0.875 -14 1 3/16-12 102 75
25.40 1.000 -16 1 7/16-12 142 105
31.75 1.250 -20 1 11/16-12 190 140
38.10 1.500 -24 2-12 217 160

00-23
SEALER SPECIFICATIONS
The following sealers should be used as directed in the manual:
Anaerobic sealer LOCTITE GASKET ELIMINATOR 518
RTV silicone sealer LOCTITE SUPERFLEX 593, 595 or 596 LOCTITE ULTRA BLUE 587 DOW CORNING SILASTIC 732 GENERAL ELECTRIC RTV 103 OR 108
Pipe sealant PST 592 PIPE SEALANT WITH TEFLON
Thread-locking compound LOCTITE 271 THREADLOCKER/SEALANT (red)
HARDWARE TORQUE VALUES
Check the tightness of hardware periodically.
Use the following charts to determine the correct torque when checking, adjusting or replacing hardware on the tractor.
IMPORTANT: DO NOT use the values listed in the charts if a different torque value or tightening procedure is specified in this manual for a specific application. Torque values listed are for general use only.
Make sure fastener threads are clean and not damaged.

00-24
M4 15* (1.7) 19* (2.2) 23* (2.6) 30* (3.4) 33* (3.7) 42* (4.8) 16* (1.8)
M6 51* (5.8) 67* (7.6) 79* (8.9) 102* (12) 115* (13) 150* (17) 56* (6.3)
M8 124* (14) 159* (18) 195* (22) 248* (28) 274* (31) 354* (40) 133* (15)
M10 21 (28) 27 (36) 32 (43) 41 (56) 45 (61) 58 (79) 22 (30)
M12 36 (49) 46 (63) 55 (75) 72 (97) 79 (107) 102 (138) 39 (53)
M16 89 (121) 117 (158) 137 (186) 177 (240) 196 (266) 254 (344) 97 (131)
M20 175 (237) 226 (307) 277 (375) 358 (485) 383 (519) 495 (671) 195 (265)
M24 303 (411) 392 (531) 478 (648) 619 (839) 662 (897) 855 (1160) 338 (458)
NOTE: Torque values shown with * are inch pounds.
IDENTIFICATION HEX CAP SCREW AND CARRIAGE BOLTS
CLASSES 5.6 AND UP
METRIC HARDWARE AND LOCKNUTS
SIZE UNPLATED PLATED UNPLATED PLATED UNPLATED PLATED W/CL8.8 W/ZnCr W/ZnCr W/ZnCr BOLT
CLASS 5.8 CLASS 8.8 CLASS 10.9
PROPERTY CLASS
LOCKNUT CL.8NOMINAL
CLOCK MARKING
00-25
IDENTIFICATION CAP SCREWS AND CARRIAGE BOLTS
LOCKNUTS
1 213 (289) 275 (373) 547 (742) 708 (960) 773 (1048) 1000 (1356) 386 (523) 545 (739) 1
7/8 142 (193) 183 (248) 365 (495) 473 (641) 515 (698) 667 (904) 258 (350) 364 (494) 7/8
3/4 146 (198) 189 (256) 226 (306) 293 (397) 319 (432) 413 (560) 160 (217) 226 (306) 3/4
5/8 83 (112) 107 (145) 128 (174) 165 (224) 180 (244) 233 (316) 90 (122) 127 (172) 5/8
9/16 60 (81) 77 (104) 92 (125) 120 (163) 130 (176) 169 (229) 65 (88) 92 (125) 9/16
1/2 42 (57) 54 (73) 64 (87) 83 (113) 91 (123) 117 (159) 45 (61) 64 (88) 1/2
7/16 27 (37) 35 (47) 42 (57) 54 (73) 59 (80) 77 (104) 30 (41) 42 (57) 7/16
3/8 17 (23) 22 (30) 26 (35) 34 (46) 37 (50) 48 (65) 19 (26) 26 (35) 3/8
5/16 115* (13) 149* (17) 178* (20) 229* (26) 250* (28) 324* (37) 125* (14) 176* (20) 5/16
1/4 55* (6.2) 72* (8.1) 86* (9.7) 112* (13) 121* (14) 157* (18) 61* (6.9) 86* (9.8) 1/4
MINIMUM HARDWARE TIGHTENING TORQUES
INCH HARDWARE AND LOCKNUTS
NOMINAL UNPLAT ED PLAT ED UNPLAT ED PL ATED UNPLAT ED PL ATED GR.B GR.C NOMINAL SIZE or W/ZnCr or W/ZnCr or W/ZnCr w/GR5 w/GR8 SIZE
PLATED PLATED PLATED BOLT BOLT SILVER GOLD SILVER GOLD SILVER GOLD
SAE GRADE 2 SAE GRADE 5 SAE GRADE 8 LOCKNUTS
SAE GRADE 2 SAE GRADE 5 SAE GRADE 8
REGULAR NUTS SAE GRADE 5 HEX NUTS
SAE GRADE 8 HEX NUTS
GRADE IDENTIFICATION
AT CORNERS
00-26
LUBRICATION
New Holland (North America) Adequate lubrication and maintenance on a regular schedule is vital to maintaining your equipment. To ensure long service and efficient operation, follow the lubrication and maintenance schedules outlined in this manual. The use of proper fuels, oils, grease and filters, as well as keeping the systems clean, will also extend machine and component life.
IMPORTANT: Always use genuine New Holland replacement parts, oils and filters to ensure proper operation, filtration of engine and hydraulic systems. See your New Holland dealer for additional oil quantities.
RECOMMENDED LUBRICANTS AND COOLANTS
Lubricant Location Used Type and Description Part Number Quart or Liter
Gallon or Tube
SAE 30 API CF--2SJ 9613286 1Qt.
SAE 30 API CF--2SJ 9613289 2.5 Gal.
SAE 30 API CF--2SJ 9613366* 4 L
5W--30 API SG/CD 9673589DS 1 Qt.
5W--30 API SG/CD 9624590* 4 L
10W--30 API SG/CD 9613313 1 Qt.
10W--30 API SG/CD 9613314 2.5 Gal.
10W--30 API SG/CD 9673508DS 5 Gal.
10W--30 API SG/CD 9613358* 1 L
10W--30 API SG/CD 9613359* 4 L
15W--40 API CF--4 9613290 1 Qt.
15W--40 API CF--4 9673730DS 1 Gal.
15W--40 API CF--4 9613303 2.5 Gal.
15W--40 API CF--4 9613292 5 Gal.
15W--40 API CF--4 9613350* 1 L
15W--40 API CF--4 9613351* 4 L
Coolant Engine ESE-- M97B18--D, Ethylene Glycol New Hol- land Spec. Coolant Concentrate
FGCC2701DS 1 Gal.
Hydraulic Oil Hydraulic System, Hydrostatic System Front Axle Oil
134D – ESN--M2C134--D New Holland Spec. Hydraulic oil
9624450 2.5 Gal.
Hydraulic Oil Optional, Multi-Seasonal Use, Recommended for Low Temperatures
F200 86523625DS 1 Qt.
F200 86523626DS 5 Gal.
F200 86509446* 20 L
Gear Oil Gearboxes 80W90 EP Gear Oil API GL5 9613295 1 Qt.
80W90 EP Gear Oil API GL5 9613294 2.5 Gal.
80W90 EP Gear Oil API GL5 9613375* 5 L
85W140 EP Gear Oil API GL5 9613297 1 Qt.
85W140 EP Gear Oil API GL5 9613296 2.5 Gal.
85W140 EP Gear Oil API GL5 9613376* 4 L
Grease All Grease Fittings Lithium base EP high temperature 9861804DS Tube
Lithium base EP high temperature 9861804CDS* Tube
Brake Fluid Mineral Based Oil 1QM6C34A or 86541699DS
1 Qt.

00-27
Europe (All Markets Except North America)
Adequate lubrication and maintenance on a regular schedule is vital to maintaining your equipment. To ensure long service and efficient operation, follow the lubrication and maintenance schedules outlined in this manual. The use of proper fuels, oils, grease and filters, as well as keeping the systems clean, will also extend machine and component life.
IMPORTANT: Always use genuine New Holland replacement parts, oils and filters to ensure proper operation, filtration of engine and hydraulic systems. See your New Holland dealer for oil quantities.
RECOMMENDED LUBRICANTS AND COOLANTS
Oil Engine and Pivot Points without Grease Fittings, Chains
SAE 30 Ambra Super 30
5W--30 API SG/CD Ambra Super Gold 5W--30
10W--30 API SG/CD Ambra Super Gold 10W--30
15W--40 API CF--4 Ambra Super Gold 15W--40
Coolant Engine ESE--M97B18--D, Ethylene Glycol New Holland Spec. Coolant Concentrate
Ambra Agriflu (50% mix)
Ambra Multi G Trans- mission Oil
Ambra Multi F Transmission Oil
Hydraulic Oil Optional, Multi--Seasonal Use, Recom- mended for Low Temperatures
F200 Ambra Multi H Transmission Oil
F200 Ambra Multi F/10 Transmission Oil
Gear Oil Gearboxes 80W90 Hypoide 90 LS
Grease All Grease Fittings Lithium base EP high temperature Ambra GR75MD9
Brake Fluid Mineral Based Oil Ambra Brake LHM

00-28
10-1
CONTENTS
10-2
SPECIFICATIONS
Tank material Plastic with steel frame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tank capacity Lower - 246 L (65 U.S. gal.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Upper - 170 L (45 U.S. gal.)
Torques
Tank mount to transmission bolts 115 N!m (85 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lower tank retaining strap bolts: large 115 N!m (85 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . small 64 N!m (47 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Top tank retaining strap bolts 64 N!m (47 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cab step bolts 64 N!m (47 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10-3
DESCRIPTION OF OPERATION

10-4
70-150-1592
1
2. Close the supply, 2, and return, 1, valves.
3. Open the drain valve,3, and drain the fuel intoan approved container.
4. Disconnect the fuel lines at the shutoff valves.
70-150-1593
2
5. Remove the fuel tank front, 2, and rear, 1, lower support pins.
70-150-1594
3
10-5
6. Disconnect the top to lower fuel tank hose at the top rear of the lower tank.
70-150-1595
4
7. Support the fuel tank on a floor jack. Raise and disconnect the tank from the upper support pins.
8. Carefully lower the tank assembly 10 mm (3").
70-150-1596
5
9. Disconnect the fuel sender, 1, (white) and work light, 2, (black) connectors located at the topfront of the fuel tank and lower the tank from the tractor.
10. Remove the mount brackets from the tank by removing the retaining straps. Note the large center bolt and spacer.
11. Cap all tank openings and store the tank in a suitable location.
LOWER TANK INSTALLATION
1. The tank is installed in the reverse order of disassembly. Torque the retaining straps to 64 N!m (47 ft lbs). The center bolt and spacer is torqued to 115 N!m (85 ft lbs).
70-530-1597
6
10-6
TOP TANK REMOVAL
1. The top tank can only be removed after the cab has been removed. See Section 90, Chapter 3 - “Cab Removal” in this manual for details.
2. With the cab removed and supported, remove the tank vent connection, 1, from the right rear corner of the tank.
70-150-1598
7
3. Carefully loosen the four tank attaching straps and lower the tank from the bottom of the cab.
TOP TANK INSTALLATION
The tank is installed in the reverse order of disassembly. Torque the retaining straps to 64 N!m (47 ft lbs).
70-150-1599
8
10-1
10-2
SPECIFICATIONS
Engine size 7.5 L (456 in.3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine weight 738 kg (1625 lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinders, bore x stroke 6, 112 mm x 127 mm (4.4! x 5!). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant capacity: 8670, 8770 8670/8670A, 8770/8770A 25 L (6.6 U.S. gal.). . . . . . . . . . . . . . . . . . . . . . . . 8870, 8970 8870/8870A, 8970/8970A 26.4 L (7 U.S. gal.). . . . . . . . . . . . . . . . . . . . . . . .
Torques
Engine to transmission bolts (top) 488 N"m (360 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine to transmission bolts (center) 240 N"m (177 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine to transmission bolts (bottom) 55 N"m (41 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan mount bolts to pulley 55 N"m (41 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air-conditioner compressor 54 N"m (40 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side rail bolts 528 N"m (390 ft lbs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10-3
DESCRIPTION OF OPERATION
The tractor engine is mounted to the front surface of the transmission. The engine is not attached or supported at the front bolster. The axle and front bolster are connected to the transmission by the use of side rails.

10-4
ENGINE REMOVAL
If major engine repair is required, the engine assembly can be removed from the tractor as follows:
1. Park the tractor on a level surface and apply the parking brake. Ensure that there is a clear area to use a lifting hoist to lift the engine from the tractor.
2. Remove the battery cover and the negative battery cables, 1.
3. Remove the engine hood as described in this section, Section 90, Chapter 2, “Hood Removal.”
4. Remove the left hood access door and hinge mount.
70-510-65
1
5. Remove the exhaust pipe, 1, from the right side of the tractor and the hood access door, 2, and hinge mount.
70-160-1615
2
6. Drain the engine coolant into a suitable container using the drain tap at the bottom of the radiator.
7. Remove the fan shields, 1, and the fan assembly, 2.
8. Remove all hoses, 3, from the front of the engine to the radiator.
70-110-1626
3
10-5
9. Turn the cab heater valves, 1, off and disconnect the hoses from the front and rear of the intake manifold.
70-610-1186
4
10. Remove the starter, 1, from the right rear of the engine. A 16 mm curved obstacle wrench is required to remove the inner retaining nut. The fuel filter, 2, may have to be removed for better access to the starter.
11. Remove the throttle cables, 3, from the injection pump on the right side of the engine.
12. Remove the fuel supply and return lines, 4, from the right side of the engine.
70-110-1627
5
13. Remove the cab doorsill plates, then the front floor mats and the center floor cover to gain access to the two transmission to engine retaining bolts.
70-660-1611
6
10-6
14. Remove the intercooler supply, 1, and return tube, 2.
70-160-1628
7
50015833
2
8
15. Remove the air-conditioner compressor and hoses from the engine.
NOTE: DO NOT disconnect the hoses or discharge the system.
70-610-1168
9
10-7
16. If additional air-conditioner hose clearance is required to clear the engine, remove the air- conditioner condenser, 1.
NOTE: DO NOT disconnect the hoses or discharge the system.
17. Remove the air cleaner inlet horn, 2.
70-160-1608
10
18. Disconnect the front main harness from the rear main harness (C008 connector), 1, above the batteries.
70-530-1629
11
19. Attach a suitable lift to the center attaching point in the upper engine frame.
NOTE:Removal of the transmission and rear axle oil cooler lines may be required for additional clearance.
70-110-1630
12
10-8
20. Remove thetwo toptransmission to engine bolts, 1, from inside the cab.
21. With the engine weight supported with a hoist, carefully remove the two lower bolts, 3, and the four center engine to transmission retaining bolts, 2.
70-110-1631
13
22. Pull the engine forward and up to clear the transmission and side frame rails.
23. Place the engine in a stand or on suitable blocks to allow further disassemble and repair of the engine.
70-110-1632
14
1. Installation of the engine is the reverse of removal.
2. Ensure that the engine is properly aligned without damage to wiring, lines and fittings during installation.
3. Torque all retaining bolts as indicated in the “Specifications” portion of this chapter.
70-110-1633
15
10-1
Special Tools 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Tank Valves 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Pressure Fuel System 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Injection Timing Check 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preliminary Setup Procedure 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Perform Nozzle Seat Leakage Test 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Perform Chatter and Spray Pattern Test 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Surging 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment of Foot and Hand Throttle Cables 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment of High Idle Speed 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment of Low Idle and Antisurge 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10-2
High-pressure Fuel Lines 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Injector Leak-off Line 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10-3
SPECIFICATIONS
8670/8670A 8770/8770A 8870/8870A 8970/8970A
Fuel tank capacity Lower (main) 246 L (65 U.S. gal). . . . . . . . . . . . . . . . . . . . . . . . . . . . . Upper (auxiliary) 170 L (45 U.S. gal) Total - 416 L (110 U.S. gal)
Injection pump Bosch A2000 Bosch P3000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing static deg. BTDC (non-emissionized) 24 21 16 16. . . . . .
Timing static deg. BTDC (emissionized) 18 18 16 16. . . . . . . . . .
Injectors - type Bosch, 5 Hole, Type - Differential Needle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Injector opening pressure (new) 241 bar 241 bar 255 bar 255 bar. . . . . . . . . . . . . . . . . (3500 PSI) (3500 PSI) (3700 PSI) (3700 PSI)
Injector opening pressure (used) 213 bar 213 bar 227 bar 227 bar. . . . . . . . . . . . . . . . (3100 PSI) (3100 PSI) (3300 PSI) (3300 PSI)
Recommended injector service 2400 Hours
Governor type Bosch “RSV”/All Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Governed range (RPM) 750-2310. . . . . . . . . . . . . . . . . . . . . . . .
High idle speed (RPM) 2305 ! 25. . . . . . . . . . . . . . . . . . . . . . . . .
Rated engine speed (RPM) 2100. . . . . . . . . . . . . . . . . . . . .
Fuel filter Sedimenter and Micronic Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water separator Integral with Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended fuel filter service 600 Hours. . . . . . . . . . . . . . . . .

10-4
Injection pump drive gear 38 28. . . . . . . . . . . . . . . . . . . . . . . . . . .
Injection pump rear mounting bolts 38 28. . . . . . . . . . . . . . . . . . .
Injection pump-to-front adaptor plate 38 28. . . . . . . . . . . . . . . . .
Injection pump-to-gear drive bolts 67 50. . . . . . . . . . . . . . . . . . . .
Injection timing gear access cover 38 28. . . . . . . . . . . . . . . . . . .
Leak-off tube banjo fitting bolts 9 7. . . . . . . . . . . . . . . . . . . . . .
Lift pump mounting to main junction pump, nuts (3) 8 6. . . . .
SPECIAL TOOLS
FTC213312 Universal Pressure Test Kit
FNH01721 Injection Nozzle Tester
FNH00041 Nozzle Tester Adapter
10-5
1. Fuel injector assemblies
2. Injector return lines
3. High-pressure pumping elements
5. Supply pump
9. Low-pressure supply
10. Finger screen
11. Drain valve
12. Return line

10-6
Supply Tanks Two fuel tanks are standard equipment. The lower, or main, tank, 4, having a capacity of 246 L (65 U.S. gallons), is located along the left side of the center axle housing. The upper, or auxiliary, tank, 2, having a capacity of 170 L (45 U.S. gallons), is located below the cab toward the rear of the tractor. Fuel tank filling, 8, as well as the engine supply and return, are accomplished through the lower tank. A large, diameter tube, 3, connects the upper and lower tanks. There is no valve on this tube, so it is not possible to isolate the upper and lower tanks. The tanks are vented through a tube attached to the upper tank. The vent tube, 1, extends up therightrear cab post. Both the supply, 6, and return fittings, 7, on the lower tank contain shutoff valves to ease service. The supply fitting threads into a 24 mesh inlet screen, 5, approximately 76 mm (3#) long, which in turn threads into the fuel tank. The return fitting contains a drain cock.
70-15-2200
2
10-7
NOTE: Figure 3 is 70 Series art.
NOTE: Figure 4 is 70A Series art.
Fuel Filter/Water Separator/Primer Pump The primary purpose of this assembly is to remove water and solid contaminants from the fuel before the fuel enters the gallery of the injection pump. The plunger and barrel assemblies (pumping elements) of the injection pump are matched to each other with an accuracy of a few ten thousandths of an inch. Impurities of this size can cause severe damage, or excessive wear, to the injection pump and injector assemblies. The fuel filter assembly consists of a manifold, or base, containing the primer pump, 3, along with a bleed port. For the 70A Series tractor, the primer pump, 3, is now on the top of the supply pan. The primer and bleeder (70 Series only) are used when the engine has run out of fuel or a new filter element has been installed. Threaded onto the manifold is the filter element. The water separator, 1, is in turn threaded onto the filter element. The separator bowl contains a drain, 2, that can be used if water or sediment are observed.
70-150-151
3
10-8
NOTE: 70 Series art shown in Figures 5 and 6.
Fuel Injection Pump Models 8670/8670A and 8770/8770A are equipped with the Bosch Type “A2000” pump.
70-150-2201
5
Models 8870/8870A and 8970/8970A are equipped with the Bosch Type “P3000” pump.
NOTE: Operation of both pump types is very similar.
70-150-2202
6
10-9
1. Deliver valve holder
10. Control Rod
10-10
NOTE: 70 Series art shown in Figures 8, 9 and 10.
The fuel injection pump, the heart of the fuel system, consists of a number of subassemblies.
70-150-2203
8
The supply pump is the entry point into the engine fuel system from the tanks. The supply pump is mechanically driven by the injection pump camshaft. The purpose of the supply pump is to draw fuel from the tank, and pressurize the fuel to a minimum of 1.4 bar (20 PSI) in order to cause fuel to flow through the filter, and to provide sufficient pressure for pumping element filling. The supply pump housing also contains a sedimenter assembly consisting of a clear bowl, 1, and strainer screen, 2. The clear bowl should be inspected for sediment every 50 hours and cleaned every 300 hours.
70-150-152
9
The rear portion of the injection pump assembly houses the all-speed “RSV” mechanical governor. The governor receives inputs from the following:
$ Throttle control lever, 1
$ Intake manifold pressure, 3
$ Engine oil pressure, 2
$ Mechanical fuel shutoff lever, engine side of pump (not shown), which is, in turn, controlled by the fuel shutoff solenoid
70-150-2204
10
10-11
70-150-2205
11
10. Torque control & idle speed helical compression spring
11. Full load stop (fuel delivery)
12. Fulcrum lever
13. Guide bushing
18. Control rod
Receiving these inputs, the governor, by moving the pumping element control rack, 18, controls engine- off, excess fuel for starting, minimum and maximum idle speeds, and any midrange speeds independent of load. A pair of flyweights, 14, are attached to the pump camshaft. The force of the flyweights increases with engine speed. The force of the weights operates against that of the governor spring, 8. The tension on the governor spring is varied by the

10-12
Aneroid assembly The aneroid assembly prevents excessive smoke under load by limiting maximum fuel delivery until the turbocharger is providing sufficient air to effect clean combustion. An example of this operation would be starting a load out onto a roadway, when the engine is idling, and throttle position and load are increased simultaneously.
1 Headless setscrew
2 Plate washer
3 Governor cover
70-150-2206
12
The aneroid also contains a hydraulic activator, 1, which is controlled by engine oil pressure, A. When there is no oil pressure, B, the activator allows the control rack full travel to the excess fuel position. Without this feature, during starting, fuel delivery would be extremely limited due to lack of turbocharger boost pressure.
1 Hydraulic activator
2 Bell crank
10-13
Overflow Valve Assembly The supply pump has a capacity of about twice that of the requirements of the high-pressure pumping elements. This excess flow provides cooling and lubrication for the injection pump. Flow from the supply pump travels through the filter element and then to the fuel gallery of injection pump, where it is available to fill the pumping elements. The fuel must be pressurized in order to properly fill the pumping elements. The job of the overflow valve, 1, is to maintain a pressure of approximately 1.5 bar (22 PSI) in the fuel gallery. Once that pressure is reached, the overflow valve opens and allows the excess fuel to return to the tank.
70-150-2208
14
High-Pressure Pumping Elements The high-pressure pumping elements, one for each engine cylinder, supply fuel at a pressure of approximately 240 bar (3500 PSI) to the injectors. The pumping elements must provide the fuel in a precisely measured amount at the proper time.
Operation of the individual element is as follows:
70-150-2209
15
10-14
Fuel in
Reference (C) -- Spill port opening / Fuel delivery ends
(A) With the plunger, 1, at the bottom of the stroke, fuel flows into the barrel through the spill port, 2, and fills the space above the plunger.
(B) As the plunger, 1, rises, the spill port in the barrel, 3, is covered and the fuel is trapped. This is the point of port closure. The continued upward movement of the plunger pressurizes the trapped fuel until the delivery valve (at the base of each high-pressure injection line) is lifted from its seat. High- pressure fuel is transmitted through the line to the injector and injection takes place through the injector nozzle.
(C) Injection stops when the upper edge of the helix, 4, uncovers the lower edge of the spill port. Pressure escapes to the fuel gallery. The drop in pressure causes the injector to close and injection to stop. After fuel delivery ceases, the plunger continues to the top of the stroke and is returned by a spring for the next cycle.
FUEL
FUEL
16
Because the end of delivery is reached when the helix on the plunger uncovers the spill port, 1, the amount of fuel delivered is varied by turning the pump plunger as shown at D. If the plunger is turned until the vertical groove completely uncovers the spill port as shown at E, during the entire lift of the plunger, there will be no fuel delivered to the engine. This is because injection pressure cannot be reached, thereby shutting off the engine.
The plungers are rotated by a control rack splined to each plunger. Rack movement is determined by the control rod, actuated by the governor.
17
10-15
Fuel Delivery and Timing During Starting The plungers, 1, are equipped with starting grooves, 2, on their crown. The purpose of this groove is to assist in starting the engine by providing both excess fuel and slightly retarded timing. When the key switch is turned on, the fuel shutoff solenoid retracts, moving the mechanical shutoff lever to the “RUN” position. The starting spring in the governor housing pulls the control rack fully forward, beyond the normal maximum fuel position. This aligns the starting groove with the spill port. With the starting groove aligned with the spill port, there is a delay in spill port closure which, in turn, delays the start of injection. Note also that there is no helix in this region of the plunger, so once injection begins, it is not cut off until the plunger reaches the end of its stroke. This provides a very large amount of fuel to aid starting.
18
Delivery Valves A delivery valve is located above each plunger. The delivery valve serves as a one-way valve which allows fuel under injection pressure to move into the high pressure tubes and prevents fuel from coming back. The valve also serves to rapidly reduce pressure in the injection line once pressure from the plunger has ceased. Rapid pressure reduction is required to ensure the injector valve snaps shut to prevent fuel “dribble,” a condition which can cause carbon formation on the injector tip.
(a) Valve closed
Components are identified as follows:
1 Delivery valve holder
10-16
Fuel Injector Assemblies The job of the injector assembly is to atomize the fuel in order to facilitate proper combustion. The injector must cleanly deliver the fuel into the combustion chamber with a good spray pattern. There must also be a “crisp” start, and end of, injection with no drips either before or after the injection cycle.
The nozzle is housed within a nozzle holder. In order to properly place the fuel charge into the combustion chamber, dowel pins orient the nozzle within the holder, and a clamp ring orients the holder within the engine cylinder head.
Operation of the injection nozzle is as follows:
1 High pressure inlet line
2 Edge-type filter
3 Pressure channel
4 Intermediate disc
5 Nozzle-retaining nut
7 Holder body
8 Leak-off port
9 Pressure-adjusting shims
10 Pressure spring
11 Pressure spindle
13 Injection nozzle
10-17
The high-pressure line delivers the fuel charge from the injection pump. Fuel enters the inlet and passes through the edge-type filter. Coarse foreign particles are retained by the filter.
A passage routes fuel through the nozzle holder to the nozzle valve. The nozzle valve is lifted off its seat by the high-pressure inlet fuel, 1, acting on the annulus in the valve.
When the nozzle valve opens, a definite quantity of fuel (determined by the injection pump output for each plunger stroke) is forced out through the orifices. The fuel becomes finely atomized as it is sprayed into the combustion chamber at high velocity. Once fuel flow from the pump ceases, the spring pressure forces the needle valve back onto its seat via the spindle and needle valve stem. Fuel dribble should not occur, as might happen if the nozzle showed excessive wear.
The nozzle assembly is lubricated by a small amount of fuel which seeps between the lapped surfaces of the nozzle and valve which accumulates around the spring.
The leakage fuel, 2, is routed out the nozzle holder through a leak-off connector and returned back to the fuel tank.
70-150-2211
21
Fuel Shutoff Solenoid The purpose of the fuel shutoff solenoid, 1, is to move the mechanical fuel shutoff lever to the “RUN” position when the key switch is turned on, and to keep the lever in that position while the key switch remains in the “RUN” position. When the key switch is turned “OFF,” the solenoid is de-energized, and allows spring force within the governor housing to move the mechanical shutoff lever to the “FUEL- OFF” position.
70-150-2212
22
10-18
The fuel shutoff solenoid is connected to the tractor electrical systemwith a 3-wire connector. Wire colors (noted on the TRACTOR harness, NOT the fuel solenoid) are as follows:
Ref Color Function Maximum
1 Black Ground N/A
2 Orange Pull 60
3 Purple Hold 0.87
When the key switch is first turned to the “RUN” position, power is supplied to both the “pull” and “hold” circuits. After approximately 2 seconds, power to the “pull” circuit is removed, and only the “hold” circuit continues to be powered.
See the Electrical System - Section 55 for further information on electrical operation of the fuel shutoff solenoid.
The solenoid linkage must be free to travel fully. If the mechanical shutoff lever is not moved fully to the “RUN” position, difficult starting or failure to develop full power may occur.
70-150-2213
1
2
3
23
Plumbing
Low-Pressure Fuel Lines The purpose of the low-pressure fuel lines, 1, is to carry fuel from the tank to the injection pump gallery and to return excess fuel from the pump and injectors to the tank.
High-Pressure Fuel Lines The purpose of the high-pressure fuel lines, 2, is to carry fuel, under high pressure, from the injection pump to the injector assemblies. These lines are a precise length to provide proper fuel delivery. For this reason, always use the correct line if replacement is required.
70-150-2214
24
10-19
TESTING AND DIAGNOSIS
The fuel system can be divided into 4 basic components. See the “Description of Operation” section for details on each of these components.
$ The low-pressure system consists of the fuel supply tanks, supply (lift) pump, filter assembly, overflow valve, injector leak-off lines, and the associated plumbing. The job of the low-pressure system is to present to the high-pressure pumping elements a supply of clean fuel, with very little entrained air, at a regulated pressure of approximately 1.52 bar (22 PSI). An unrestricted return of excess fuel to tank also must be provided. The low-pressure system also must prevent or “check” the flow of fuel out of the injection pump gallery when the engine is not operating.
$ The high-pressure system consists of the pumping elements, delivery valves, fuel injector assemblies, and the lines connecting the pump to the injectors. The job of the high-pressure system is to delivery a measured, atomized chargeof fuel into thecombustion chamber at the proper time.
$ The governor controls high and low idle speeds and attempts to maintain constant engine speed at the various throttle lever positions selected by the operator.

10-20
Initial Test Conduct the following test FIRST. If the system passes this test, along with the leakback test, then the problem is not with the low- pressure fuel system.
Check the system for air ingress, and correct pressure. Required gauges and fittings will be found in Pressure Test Kits FTC213312 and FTC61682.
Install a clear line, with tee, between the filter manifold and the pump gallery inlet. This also will be referred to as the Filter Outlet Pressure Test below. With the engine operating under load, such as on a dynamometer, the fuel stream should be clear, and under a pressure of approximately 1.52 bar (22 PSI).
If insufficient pressure is found, check the following:
FUEL TANK VALVE(S)
Ensure that both the supply and return valves at the lower fuel tank are open.
70-150-2215
25
FILTER INLET AND OUTLET PRESSURE TESTS
Leave the gauge and clear line installed between the filter and pump gallery inlet. Install a second gauge between the supply pump and filter.
Operate the engine at full load. Monitor filter inlet and outlet pressures. Specifications are as follows:
Filter Outlet Pressure 1 - 2 bar (15-28 PSI). . . . .
Filter Inlet Pressure 1 - 2.1 bar (15-30 PSI). . . . . . .
Difference Between Inlet and Outlet Pressures 0.5 bar max. (7 PSI). . . . .
If pressure drop across the filter is excessive, first replace the filter element. If pressure drop continues to be excessive, replace the filter base.
70-150-2216
26
10-21
Supply Pump Sedimenter
Clean, or replace, the screen in the sedimenter. Be sure that the bowl is sealing well against the housing.
IMPORTANT: Before loosening or disconnecting any part of the fuel injection system, thoroughly clean the area to be worked on.
To clean the sedimenter:
1. Remove the sedimenter bowl, 1, from the lift pump, 2. Catch the fuel in a suitable container and dispose of properly.
2. Inspect the O ring, 3, and replace if damaged.
3. Remove the screen, 4, and spring, 5.
4. Clean screen and bowl.
5. Inspect screen and replace if damaged.
6. Install the spring and screen in the bowl.
7. Fill the bowl with clean, fresh fuel.
8. Install the bowl. Hand tighten only.
9. Depress the hand primer on the fuel filter manifold repeatedly until resistance is felt and the sedimenter bowl is full.
10. Start the engine and check for leaks.
NOTE: A partially plugged filter screen can cause reduced fuel supply to engine. This can cause low power performance.
IMPORTANT: If the engine does not start after cranking for 20 seconds, the fuel system must be purged of air.
70-150-178
27
Supply Pump - Perform Pump Output Test
1. Connect a 0 - 60 PSI gauge to one end of a pressure hose 10 - 12# long. Connect the other end ofthe hose to the pumpoutlet.All air mustbe out of the system.
2. Crank the engine for 10 seconds with the starter motor (approximately 200 RPM). Supply pump minimum pressure should be 2.0 bar (29 PSI).
IMPORTANT: The starter motor must crank the engine at normal cranking speed. Use booster batteries if necessary.
3. If pressure is below the minimum specified above, check the in-tank strainer and supply line from the tank to pump. If no obstruction is found, replace the pump.
70-150-2217
28
10-22
Overflow Valve Temporarily replace the valve with a known good valve. If the overflow valve is at fault, it must be replaced as an assembly.
70-150-2208
29
In-Tank Strainer The strainer can be accessed by removing the inlet fitting. It will be necessary to first drain the fuel tanks. Both tanks drain through the cock at the return fitting.
70-150-2218
30
10-23
Test for Air Ingress If air ingress is indicated by foam and bubbles during the initial test, conduct the following test:
1. Disconnect the fuel supply line, 1, and return line, 2, at the fuel tank.
2. Direct the return line to a drain pan.
3. Using an air source regulated to not more the 2.75 bar (40 PSI), pressurize the fuel system at the fuel supply line. Most of the fuel will be forced out of the system and into the drain pan.
NOTE: This procedure is necessary since air is less viscous (is thinner) than diesel fuel, and air will leak both in and out of a system component where fuel will not.
4. Once the fuel is purged from the system, shut off the air source.
5. Reinstall the return line to the tank fitting and ensure that the return valve is closed.
6. Using an air source regulated to not more the1.4 bar (20 PSI), pressurize the fuel system at the fuel supply line.
70-150-2219
31
7. Apply liquid soap and water solution to all joints and connections in the fuel system and inspect for leaks.
8. If any leaks are found, take the necessary steps to repair.
9. Reconnect the supply and return lines and prime the system.
10. Start the engine and run it for approximately 10 minutes.
70-150-2220
32
10-24
Leakback to Tank with Engine Off When the engine is shut off, it is important that the injection pump fuel gallery remain full of fuel. If fuel trapped in the gallery is allowed to drain back to the tank, a void develops in the gallery. This void must be refilled with fuel before the engine will start. This situation can cause very difficult cold starting.
The fuel is trapped in the gallery by a one-way check valve in the supply pump and by the overflow valve.
To Test Leakback Install a clear line several feet long to the supply pump inlet port.
Install a clear line several feet long to the return port on the pump.
Place a container of CLEAN fuel onto the floor, and insert both clear lines into the container.
Start the engine.
You will observe the fuel being drawn out of the container through the supply line and returned through the return line.
Continue to operate the engine until all air is cleared from the system.
Shut off the engine.
70-150-2221
33
Leave the engine shut off for a period of at least 4 hours. Overnight is better.
Using the same principal as the finger over the straw, the clear lines should remain nearly full of fuel.
If the fuel leaks out of the supply line, the problem is with the supply pump which should be replaced.
If the fuel leaks out of the return line, the problem is with the overflow valve which should be replaced.
70-150-2222
34
10-25
HIGH-PRESSURE FUEL SYSTEM
The job of the high-pressure system is to deliver a measured, atomized charge of fuel into the combustion chamber at the proper time.
The high-pressure pumping elements are housed within the injection pump.
IMPORTANT: Internal repairs to the fuel injection pump must be accomplished through a Bosch authorized Diesel Service Dealer (DSD). The only adjustment that can be accomplished to the pump on-vehicle is low speed idle adjustment.
Should symptoms arise that indicate a problem with the high-pressure portion of the fuel system, the following procedures should be used.
INJECTION TIMING CHECK
The spring-loaded go/no-go pin, tool number FNH00536-2, 1, can be used to verify correct timing.
The rigid pin, 2, should be used during injection pump installation.
70-150-2223
35
70-150-2224
36
10-26
70-150-2225
37
3. Locate the timing pin hole on the front of the injection pump.
70-150-2226
38
4. Using a 29 mm (1-1/8#) socket on the bolt at the front of the crankshaft, rotate the engine

246015692 FORD New Holland 8670 8770 8870 8970 WSM

Documents

Transcript of 246015692 FORD New Holland 8670 8770 8870 8970 WSM