®®

EngineEngine Model Cat® C7 ACERT™Net Flywheel Power 136 kW 182 hp

DimensionsWheelbase 3534 mm 139.2 in

WeightsEst Operating Weight 17 711 kg 39,045 lb

• Operating weight includes enclosed cab, 30.5 tires,decking blade, arch, bunching grapple, winch

GrappleBunching Capacity 1.16 m2 12.5 ft2

Thinning Capacity 1.34 m2 14.4 ft2

525CWheel Skidder

2

525C Wheel SkidderThe 525C wheel skidder sets the standard for productivity and durability.

Engineered to exceed customer expectationsin the toughest applications. Caterpillarquality, improved serviceability andproductivity provide maximum uptime andlower owning and operating costs.

Customer Support

Your Cat dealer offers support you cancount on, from purchase options tooperator training, maintenanceprograms and unmatched partsavailability… all to keep your Catskidder up and running when you needit. pg. 12

Serviceability

The 525C was designed to make regularmaintenance easier, extend serviceintervals, and reduce the time requiredfor maintenance. pg. 11

✔

Hydraulics

The state-of-the-art closed-center,variable displacement, pressurecompensating hydraulic systemprovides power for braking, steering,blade and grapple functions.

pg. 6

Power Train

The field-proven Cat torque converter,heavy-duty transmission and highperformance axles improve availability,performance and productivity, whileminimizing fuel consumption.pg. 5

Engine

The Cat® C7 engine with ACERT™technology is field proven and U.S.EPA Tier 3 compliant. The industryleading Caterpillar® lock up torqueconverter automatically engages /disengages direct drive for maximumefficiency, performance andproductivity. pg. 4

✔

✔ New Feature

3

Work Tools

Large Cat grapples maximizeproduction with a new tong profile andhigher clamping forces. Raised edgesand wear resistant cast tips provideadded durability. The hydraulic winchis ideal for self-retrieval and log trucktowing. pg. 10

✔

Operator Station

Finger tip gear selection, 1/4 turnsteering, improved ergonomic controllayout and reduced operator lever effortcontribute to the most comfortableoperator environment. pg. 8

✔

Structures

The 525C structures are Caterpillardesigned and manufactured, built forthe most demanding logging conditions.Durable box section mainframes anddecking blade provide superior strength.pg. 7

✔

Cat C7 Engine. The Cat C7 usesCaterpillar’s breakthrough ACERT™Technology to meet exhaust emissionreduction standards. It features efficientair management, fuel delivery andelectronic control for high productivityand exceptional service life.

Engine Design. This four-stroke engineprovides efficient fuel combustion.Precise engineering and thoroughtesting assure durability, reliability andplenty of power. Built-in serviceabilityand excellent fuel economy loweroperating costs.

ACERT™ Technology. Caterpillaroptimizes engine performance whilemeeting EPA Tier 3 regulations.ACERT™ Technology reducesemissions during the combustionprocess by using advanced technologyin the air and fuel systems, inconjunction with integrated electronics.Caterpillar meets emission regulationsat the combustion source rather thanrecycling exhaust gases.

ADEM A4 Control Module. Controls thefuel injector solenoids to monitor fuelinjection. This system providesautomatic altitude compensation, and itwill not allow the engine to fire until ithas oil pressure, acting as cold startprotection and a form of pre-lube.

Turbocharger. The C7 features a wastegate turbocharger that provides highboost over a wider range, improvingengine response and peak torque, aswell as providing outstanding low-endperformance.

Improved HEUI Fuel Injectors. The CatC7 has proven high-pressure, directinjection fuel system electronicallymonitors operator demands and sensorsoptimize engine performance.

Maintenance. The C7 engine reducescosts and downtime with a 500-hour oilchange interval. Extended serviceintervals can save thousands of dollarsover the life of a machine. Machinesare equipped with Caterpillar highefficiency oil filters, whoserevolutionary design doubles efficiencywithout increasing the change interval.They provide clean oil to the engine,reducing wear on all lubricated surfacesand the chance of contamination.

Water Pump. A dual thermostat controlimproves coolant flow and heatdissipation, resulting in betterdurability.

Electronic Transfer Pump. The electricfuel transfer pump is self-priming,eliminating the need for a manualpriming pump.

Reliability Features. The C7 offersmaximum reliability and responsethanks to a range of features:

• Improved fuel injectors and pump

• Leak-free design

• Higher cylinder pressures

• Reinforced cylinder block

Leak-Free Design. Improved jointsthroughout the engine reduce the chanceof leaks. The oil pan seal, timing coverand block to flywheel housingincorporate a leak-free design proven inthousands of Cat on-highway truckengines in the field.

Commonality. The Cat C7 engine isused in other Cat products including950H medium wheel loader and 324Dand 325D excavators. This enginecommonality ensures the highest levelof reliability and durability as well assuperior parts availability worldwide.

4

EngineThe Cat power train delivers top performance, power, and durability.

Five-Speed Transmission. The fieldproven Cat power shift countershafttransmission easily matches enginepower to the load size and groundconditions. Electronic control makesfingertip controls possible, reducingoperator fatigue and improving comfort.

Gear Application. Gear ratios arecarefully designed to maximizeproductivity in specific cycle segmentsand under specific loads.

• Gear 1 provides highest rimpullcapability for heavy loadapplications.

• Gears 2, 3 for normal loads andhigher speed operations.

• Gears 4, 5 provide excellent emptyreturn and roading speeds.

Torque Converter. The large, heavy-duty torque converter maximizes theproductivity of the entire drive train.The torque converter is matched to theCat C7 engine for excellent rimpull andskidding performance. This lock-uptorque converter has proven itsdurability over thousands of hours ofpunishing loads.

Reduced Wheel Slip. Torque converterdirect drive capability, combined withthe lock-up differential, reduces wheelslip. This minimizes rutting and soildamage in straight-ahead pulls onweaker soil. In turn, it minimizes tirewear, component stress and fuelconsumption, reducing total operatingcosts.

Lock-up Clutch. The integral lock-upclutch allows the machine to operate inconverter drive for greater rimpull, ordirect drive for high efficiency haulingand faster travel speeds. Direct drivecapability allows up to 15% highertravel speeds when the lock-up clutch isengaged.

Auto Lock-up. The lock-up clutchautomatically engages according toground speed and engine speedconditions. This feature is handledelectronically and allows for increasedtravel speeds in the same gear.

Reduced Shifting. Torque multiplicationcapability of the torque converterreduces the need for the operator tocontinually shift the transmission tomaintain good skidder performance, asis required on competitive skidders.This reduces operator effort andimproves machine productivity.

Differential Locks. Normal operation iswith the differential locks in both axlesdisengaged, meaning the all four wheelsare free to drive independently. Lockinga differential forces both wheel on anaxle to turn in sync with each other.

Both front and rear differential locks areeasily engaged and disengaged with aconveniently located switch on the righthand console. Hydraulically actuateddifferential locks allows for on-the-goengagement or disengagement.

Front Axle. The 525C front axle featuresa pinion-mounted design and a thickerhousing, eliminating the need for thefront axle guard. The 525C uses durableductile iron for the center housing andleg housings.

Brake Components. Brake componentsare housed inside the axles, protectingthem from dirt, dust and wet groundconditions. Inboard brakes allow forsplash lubrication and cooling. They arevirtually maintenance free, and providereliable brake performance in the mostdemanding logging applications.

Oil Sump. Full axle-length oil sumpdelivers excellent lubrication and heatrejection for long component life.

Splash Lubricated. All axle componentsare splash lubricated. The outboardbearings are maintenance free.

Heat Rejection. Oil capacity providesexcellent heat rejection, ensuring properlubrication of all axle components.

5

Power TrainThe integrated Cat power train delivers dependable, relentless pulling power.

Load Sensing Hydraulics. A loadsensing variable displacement pumpand pressure compensating systemcontinually monitor hydraulic powerrequirements, then provides powerbased on demand.

Lower Power Consumption. Thevariable displacement hydraulic pumpdraws engine power only when braking,steering, dozer or grapple actuationdemands flow or pressure. Thisconserves engine horsepower andincreases fuel efficiency.

Cooling Demands. Since the hydraulicpump runs only when needed, itgenerates less hydraulic system heat,allowing the cooling system to allocatemore capacity to the engine,transmission and torque converter.

Oil Cooler. The oil cooler was relocatedabove the radiator for better hydraulicoil cooling performance and to makeradiator cleanout easier.

Auto-Grab Feature. Auto-Grab,engineered by Caterpillar, constantlymonitors tong pressure and adjusts asneeded to securely hold grapple loadswhile skidding. It is easily activated ondemand by a switch located on theright-hand control lever.

Cat ToughGuard™ Hoses. CaterpillarXT®-3 ToughGuard™ hoses improvehose life in the grapple, arch, boom andacross the hitch. ToughGuard hoseshave been very successful in reducingearly hour hose failures. O-ring faceseals assure rock-solid connections thatmaintain pressure and reduce oil leaks.

Steering. Fully hydraulic control. Meetsthe following standards: SAE J1511OCT90, ISO 5010-1992.

6

HydraulicsState-of-the-art hydraulic system contributes to system provides dependable power andmaximum efficiency.

Box-Section Construction. Caterpillardesigned and manufactured box sectionstructures set the industry standard forreliable, durable main frames. Extensivecomputer analysis and field-testingresulted in the design of the 525C. The525C has stronger hitch design andlarger bearings to neutralize anddistribute vertical and horizontal loadsover a larger surface area. Each framecan absorb twisting.

Absorbs Twisting and Shock Loads.Frames can absorb twisting and impactforces to provide a sound foundationand well-balanced system for the entirestructure.

Superior Balance. Low center of massand weight forward design createexcellent skidder balance.

Maneuverability. The 525C skidderprovides the tightest turning radius forsuperior maneuverability while stillmaintaining the excellent balancerequired for high capacity skidding.

Caterpillar Manufacturing. The frontand rear frames are robotically weldedand manufactured by Caterpillar toensure the highest level of quality anddurability.

Hitch. A larger and improved centersection features oversized plates andbosses to disperse forces. A largedouble-tapered roller bearing is used onthe lower hitch for reduced flexingstress and maintaining tight joints.

Hitch Pins. The wide hitch pin spreadsignificantly reduces horizontal loadingon hinge pins and hinge pin bearings forgreater durability and extended pin andbearing life. The extra room alsoincreases hydraulic hose clearance andmakes hose routing easier.

Fenders. Rear frame fender options areavailable for both grapple and cablearrangements.

Arches and Booms. All Caterpillararches use box-section construction, andare thoroughly tested to exceeddurability requirements.

Dual-Function Arch. The 525C isavailable with a dual function arch andcompatible with a sorting or bunchinghead. The dual-function arch offersvariable reach, which minimizesmachine maneuvering to pinpoint a loadwith the grapple, and large grapplecapacities.

Cable Arch. Allows outstanding lineskidding performance with a two-position adjustable height fairlead tomatch site conditions.

7

StructuresThe 525C mainframe, hitch and decking blade are designed and built to surpass theexpectations of the logging industry.

Comfortable Work Station. The workstation incorporates years of cab designinnovations to maximize operatorcomfort and productivity.

Air Suspension Seat. Standard airsuspension seat swivels 30° to the rightfor maximum comfort, while allowingthe operator to observe skidder andgrapple operations to the rear.

Sealed Cab. The pressurized cab issealed from exterior air (with windowsclosed) for efficient heating andcooling. Tight door and window casingsalso keep out dust, fumes and insects.

Air Conditioning. Standard with theenclosed, pressurized cab, airconditioning helps the operatorconcentrate on work rather thanenvironmental distractions. A dedicatedcab filter assures clean air, while tightdoor and window casings keep out dust,fumes and insects.

Windows. Tough polycarbonatewindows protect the operator, and arelarge enough for an excellent side andrear view, increasing operatorconfidence and productivity. Slidingglass windows protected by metalscreens in both doors provide fresh airand communication outside themachine.

Sound Insulation. With the optionalenclosed cab, ample sound insulationkeeps interior sound levels low.Reduced sound levels meet operatorenvironment regulations andsignificantly boost operator comfort,especially on long shifts.

Cab Mounting. The modularROPS/FOPS cab is resiliently mountedto the skidder frame, reducing vibrationfor greater comfort and a quieter ride.

Machine Controls. The comfortableoperator environment usesergonomically designed and placedmachine controls to reduce fatigue andincrease productivity.

Steering Column. Tilts and telescopes tofit any size operator. Transmissiondirection and range selection controlsare built into the steering wheel forconvenience and productivity.

Steering Articulation. Full 90° steeringarticulation, stop-to-stop, with aboutone-quarter wheel rotation, providesexcellent maneuverability andproductivity.

Transmission Controls. Transmissioncontrols for forward, reverse and gearrange are located on the steering wheelfor easy fingertip control. The operatorcan control machine functions withminimal effort, allowing greaterconcentration on loading operations.The result is higher productivity andreduced operator fatigue.

8

Easy to operate, fingertip controls, less fatigue

Operator Station

Governor Pedal. The governor pedal hasbeen moved to the right for moreclearance between the brake pedal, andfor improved operator comfort.

Single-lever Grapple Control. A singlefour-function joystick control has topmounted switches for grapple open andclose, tong rotate, and Auto-GrabSystem activation. The control issimple, convenient and easy to use.

Decking Blade Control. Relocating thedozer control to the right consolereduces operator effort and improvescomfort. Excellent modulation providesprecise control for various decking andclearing functions while reducingoperator fatigue.

Auto-Grab Switch. The Auto-Grabsystem monitors and adjusts tongpressure as needed to maintain a securegrip on grapple loads.

Lock-up Torque Converter Drive. Lock-up torque converter drive selectionswitch helps match transmission speedrange to skidding requirements. Anindicator light informs the operatorwhen the torque converter is in thelocked mode.

Differential Lock Switch.Ergonomically located rocker switchallows quick engagement of differentiallocks when needed.

Monitoring Controls. Convenientlylocated and easy-to-see gauges anddisplays make monitoring machinesystems as simple as possible.

Gauges. Four gauges indicate enginecoolant temperature, hydraulic oiltemperature, torque converter oiltemperature, engine rpm and fuel level.

Caterpillar Monitoring System.Monitors fuel, temperatures, vitalelectrical systems, gear speed anddirection. A three-level warning systemalerts the operator of potentialproblems.

Additional. The right hand console has astandard 12V outlet for poweringauxiliary equipment. The cab is pre-wired and fitted for an entertainmentradio, and a CB type 2-way radio.

ROPS / FOPS. FOPS (Falling ObjectProtection) and ROPS (Roll-OverProtection) guards offer protection tothe operator and the machine.

9

Redesigned Grapples. Caterpillardesigned and manufactured grapplesuse box section construction forultimate durability. The new tongcurvature reduces the time it takes tobundle the load, and higher clampforces deliver excellent load retentionfor secure hauls to the landing.

Bunching Grapples. Bunching grapplesare designed for harvesting mid-to-largediameter trees, usually felled by amechanical feller buncher. Its large tongopening is designed to gather a largenumber of these stems per cycle formaximum loading. It is heavier than thesorting grapple, but its large capacityholds more stems for improvedproduction in smaller trees and largeloads.

Thinning Grapples. Thinning grapplesare designed for harvesting smalldiameter trees, usually felled by amechanical feller buncher. Its large tongopening is designed to gather a largenumber of these small stems per cyclefor maximum loading. Cat grapplesoffer large capacity for maximumperformance and productivity.

Grapple Snubbers. Grapple snubber lifewas improved, reducing grapple swing,hydraulic hose stresses and increasingcomponent life.

Flow Divider. An improved grappleflow divider delivers a higher flowcapacity and maintains consistent tongsequencing.

Hydraulic Winch. The 525C features anew electronically controlled hydraulicwinch for grapple applications,replacing the mechanical winch. Thehydraulic winch improves applicationflexibility by allowing the tractive effortto be used while winching, andeliminating the continuously rotatingdriveshaft.

The new high capacity winch has fourfunction controls: reel-in, reel-out,brake-on, and free-spool. This winch isdriven and controlled by the mainimplement hydraulic system.

Cable Winch. An electro-hydrauliclever controls the winch hydrauliccontrol valve, located on the winchcase. The integrated softwareelectronically protects free-spoolclutches.

The C-500 mechanical winch is stillavailable on cable skidders wherehigher line speeds and max drum pullare important. Winch sump oil is usedfor hydraulic control and lubrication.

Decking Blade. The decking bladeefficiently clears landings and roads,and maintains log decks. It features boxsection steel arms for superior strengthand durability. Decking blade pusharmsare mounted directly to the mainframefor excellent strength, and set lower andforward for efficient clearing of slashand debris as well as log deckmaintenance. The new electro-hydrauliccontrol improves operator comfort andcontrol of the decking blade.

• Heat-treated bolt-on edge andmaintenance-free pivot joints foroutstanding durability.

• The wide decking blade featuresbolt-on cutting edge for simplifieddecking blade serviceability anddurability.

10

Work ToolsMove more wood with powerful, flexible Cat grapples and winches.

New Engine Enclosures. Large, hingedengine enclosure doors make regularmaintenance as easy and fast aspossible. Easy access to daily servicepoints increases the likelihood thatmaintenance will be done, and increasesmachine service life. In addition, lessmaintenance time means more workingtime and greater productivity.

Ground Level Access. Most filters andlube points are accessible from theground without special tools. Remotelubrication points make daily attentionto hard-to-reach joints easy.

Rear Frame Access. Steps and grabirons have been added to the rear frameand cab for easier access to the rearframe, arch and boom.

Bolt-on Guards. Bolt-on guards offerprotection to critical components, andare easily removable for servicing.Removable floor plates and side plateallow access to components under thecab.

Radial Seal Air Filters. Hand accessmakes them easy to change, reducingair filter maintenance times.

Extended Oil Service Intervals. A 500-hour oil change interval reducesdowntime for service and lowersmaintenance costs.

Remote Engine Oil Drain. Remote oildrain lines speed up regularmaintenance and avoid accidental oilspills while servicing.

S•O•SSM Fluid Sampling Valves.Provides a fast, convenient way togather uncontaminated fluid samples,which improves analysis reliability.

Pressure Taps. Conveniently located foreasy access to hydraulic systempressure measurements.

Spin-on Oil Filters. Spin-on fuel andengine oil filters shorten downtime.

Electronic Transfer Pump. Eliminatesthe need to manually prime the fuelsystem.

Ecology Drains. The transmissioncompartment now includes a newecology drain. All major fluidcompartments (hydraulic tank, engineoil pan, radiator, axles andtransmission) now incorporate ecologydrains to make regular maintenanceeasier, and protect the environmentfrom accidental oil spills.

Hitch Hoses. The grapple pilot hoses,pressure line and load sense lines haveall been routed above the hitch, andbeen bulk-headed for easy hosereplacement and fastest service. Thehitch hoses use the Cat ToughGuard™technology and have excellent wearcharacteristics.

Electrical System. The 24V electricalsystem delivers dependable electricalpower for engine cranking, additionallighting, and engine diagnostics. Wiringcircuits are color coded, numbered andprotected by circuit breakers.

On-Board Diagnostic Systems. TheCaterpillar Monitoring Systemcontinuously checks all critical machinefunctions and components, and helpslocate faults quickly for faster repair.Extremes are recorded, including fluidtemperatures, engine speed andelectrical system events.

Radiator. Cleanout access doors locatedon both sides of the radiator help makeradiator cleanout faster. The radiatorfeatures an all aluminum constructionwith 8 fins per inch for easy cleanout.

Matched Set Hitch Bearings. Matchedset bearings come pre-assembled withthe correct pre-load from the supplier tostreamline the assembly process andensure a quality hitch joint every time.No rolling torque measurement isrequired, so the assembly process issimplified. Matched set bearings alsoreduce service time in the field.

11

ServiceabilityEase of service increases productivity.

Product Support. You will find nearlyall parts at our dealer parts counter. Catdealers use a worldwide computernetwork to find in-stock parts tominimize machine down time. Savemoney with genuine Cat Reman parts.You receive the same warranty andreliability as new products at substantialcost savings.

Machine Selection. Make detailedcomparisons of the machines underconsideration before purchase. Catdealers can estimate component life,preventive maintenance cost, and thetrue cost of lost production.

Purchase. Look past initial price.Consider the financing options availableas well as day-to-day operating costs.Look at dealer services that can beincluded in the cost of the machine toyield lower equipment owning andoperating costs over the long run.

Customer Support Agreements. Catdealers offer a variety of productsupport agreements, and work withcustomers to develop a plan that bestmeets specific needs. These plans cancover the entire machine, includingattachments, to help protect thecustomer’s investment.

Operation. Improving operatingtechniques can boost your profits. YourCat dealer has videotapes, literature andother ideas to help you increaseproductivity, and Caterpillar offerscertified operator training classes tohelp maximize the return on yourmachine investment.

Maintenance Services. Talk to yourdealer about the range of availablemaintenance services. Repair optionprograms guarantee the cost of repairsup front. Diagnostic programs such asS•O•SSM Analysis and Coolant Samplingand Technical Analysis help avoidunscheduled repairs.

Replacement. Repair, rebuild orreplace? Your Cat dealer can help youevaluate the cost involved so you canmake the right choice.

12

Customer SupportCat dealer services help you operate longer with lower costs.

13525C Wheel Skidder specifications

Power Train

Travel Speed - Fwd. 1st 6.4 km/h 4 mphTravel Speed - Fwd. 2nd 9 km/h 5.6 mphTravel Speed - Fwd. 3rd 10.9 km/h 6.8 mphTravel Speed - Fwd. 4th 15.3 km/h 9.5 mphTravel Speed - Fwd. 5th 27.5 km/h 17.1 mphTravel Speed - Rev. 1st 6.2 km/h 3.9 mphTravel Speed - Rev. 2nd 10.5 km/h 6.5 mphTravel Speed - Rev. 3rd 18.6 km/h 11.6 mphMax Drawbar Pull 177 kN 39,805 lbTorque Converter - Type Lock-up clutchTransmission 5 fwd / 3 rev

countershaft,powershift

Transmission Cooler Type PlateSteering, frame articulation +/- 45°Brakes - Service Type single disc WET

enclosedBrakes - Parking Type Drum brake on rear

output of transmissiondrop box

Hydraulic System

Circuit Type Closed center, variableflow

Pump Type Axial pistonPump Output 174 L/min 46 gal/minRelief Valve Setting 21 000 kPa 3,045 psiSteering Valve Direct link, non-followSteering Cylinder - Bore 88.9 mm 3.5 inSteering Cylinder - Stroke 437.5 mm 17.22 inSteering Cylinder - Rod 50.8 mm 2 inDiameterDozer Valve Electro-hydraulicDozer Cylinder - Bore 101.6 mm 4 inDozer Cylinder - Stroke 470 mm 18.5 inDozer Cylinder - Rod Diameter 57.15 mm 2.25 inGrapple Valve 4 or 5 stack, pilot

• Measured at 2200 rpm

Grapple

Bunching Capacity 1.16 m2 12.5 ft2

Thinning Capacity 1.34 m2 14.4 ft2

Sorting Capacity .83 m2 9 ft2

Engine

Engine Model Cat C7 ACERT™Net Flywheel Power 136 kW 182 hpNet Power - ISO 9249 136 kW 182 hpNet Power - SAE J1349 136 kW 182 hpGross Power - SAE J1995 146 kW 196 hpDisplacement 7.2 L 439 in3

Bore 110 mm 4.33 inStroke 127 mm 5 inNumber of Cylinders 6Max Torque @ Rated Speed 896 N-m at 1400 RPMDerating Altitude 3000 m 9,843 ftAir Cleaner Dry precleanerAlternator 80 ampFan Speed 1620 RPMFan Type BlowerElectrical System 24VBattery - Quantity 2Battery - Volts 12VBattery - Capacity 950 CCA Starting System Direct electric

• These ratings apply at 1,800 rpm when tested under thespecified standard conditions.

• Net power advertised is the power available at the flywheelwhen the engine is equipped with fan, air cleaner, mufflerand alternator. No derating required up to 3,000 m (9,843 ft)altitude.

• Based on standard air conditions of 25° C (77° F) and 99 kPa(29.32 in Hg) dry barometer. Used 35° API gravity fuel havingan LHV of 42,780 kJ/kg (18,390 BTU/lb) when used at 30° C(86° F) [ref. A fuel density of 838.9 g/L (7.001 lb/gal)].

14 525C Wheel Skidder specifications

Dimensions

Wheelbase 3534 mm 139.2 in

Weights

Est Operating Weight 17 711 kg 39,045 lb

• Operating weight includes enclosed cab, 30.5 tires, deckingblade, arch, bunching grapple, winch

Winch - Grapple Skidder

Max Line Pull - Bare Drum 175 kN 39,342 lbMax Line Speed 40.2 m/min 132 ft/minDrum Capacity 19.0mm (3/4in) 47 m 154 ftDrum Capacity 22.2mm (7/8in) 30 m 97 ftDrum capacity 25.4mm (1in) 28 m 91 ftDrum Diameter 229 mm 9 inDrum Width 279 mm 11 in

Winch - Cable Skidder

Max Line Pull - Bare Drum 183.5 kN 41,270 lbMax Line Speed 110 m/min 360 ft/minDrum Capacity 19.0mm (3/4in) 45 m 148 ftDrum Capacity 22.2mm (7/8in) 32 m 105 ftDrum capacity 25.4mm (1in) 25 m 82 ftDrum Diameter 254 mm 10 inDrum Width 279 mm 11 in

Service Refill

Fuel Tank 315 L 83.2 galCooling System 56.7 L 15 galDifferential, Final Drive - 52 L 13.7 galFrontDifferential, Final Drive - 52 L 13.7 galRearEngine Oil 27 L 7.1 galTransmission, Torque Converter 54 L 14.2 galMechanical Winch 24.5 L 6.5 galHydraulic System - Tank 54 L 14.3 galHydraulic System - Total 112 L 29.6 gal

15525C Wheel Skidder specifications

1A

2

9

7

5A

34

8

6

10

12

11

9

7

5

34

8

1

2

Dimensions

Dimension

dual function 4103 mm (161.5 in) single function 3760 mm (148 in)

2794 mm (110 in) 843 mm (33.2 in)

1798 mm (70.8 in) 3534 mm (139.2 in)

dual function 7626 mm (300.2 in) single function 8369 mm (329.4 in)

6945 mm (273.4 in) 581 mm (22.9 in)

1381 mm (54.4 in) 456 mm (17.9 in)

3184 mm (125.4 in) 3138 mm (123.5 in)

2622 mm (103.2 in) 3398 mm (133.8 in)

6000 mm (236.2 in)

Cable

*With 30.5 x 32 tires†Add 188 mm (7.4 in) if equipped with optional lights or water tank

All dimensions are approximate

GrappleGrapple

†

Ground level to top boom (grapple)

Ground level to top roller (cable)Ground level to axle center line*Rear axle center line to pinWheel baseOverall length (grapple)

Overall length (cable)Ground clearanceDecking blade lift heightDecking blade dig depthHeight to top of cabDecking blade widthTread widthOverall width

1

1A2345

5A6789

101112

Turning radius over tires*

16 525C Wheel Skidder specifications

525C Arch

Single Function Dual Function 1 Lift highest, retracted 2212 mm (87.1 in) 2623 mm (103.3 in) 2 Lift highest, farthest x 1944 mm (76.5 in)3 Lift maximum reach x 1336 mm (52.6 in)4 Lift lowest, retracted x 752 mm (29.6 in)5 Lift lowest, farthest 600 mm (23.6 in) 259 mm (10.2 in)6 Loaded tire radius* 843 mm (33.2 in) 843 mm (33.2 in)7 Reach highest, retracted 1630 mm (64.2 in) 1513 mm (59.6 in)8 Reach lowest, retracted x 1469 mm (57.8 in)9 Reach lowest, farthest 2521 mm (99.3 in) 2488 mm (98 in)

10 Reach highest, farthest x 2765 mm (108.9 in)11 Reach maximum x 2880 mm (113.4 in)

*With 30.5 x 32 tires

Single Function Dual Function

6

5

79

1

78

910

11

6

1

4

32

5

17525C Wheel Skidder specifications

1

24

3

65

4

3

21

*Thinning grapple is intended only for use in thinning applications

525C Grapple — Continuous Rotation

Sorting Bunching Thinning*1 Grapple capacity 0.83 m2 (9 ft2) 1.16 m2 (12.5 ft2) 1.34 m2 (14.4 ft2)2 Tip to tip height 2045 mm (80.5 in) 1920 mm (75.6 in) 1981 mm (78 in)3 Tong opening 2540 mm (100 in) 3050 mm (120 in) 3124 mm (123 in)4 Full open height 1590 mm (62.6 in) 1677 mm (66 in) 1832 mm (72.1 in)5 Minimum stem diameter 76 mm (3 in) 155 mm (6 in) 190 mm (7.5 in)6 Fully closed height 1829 mm (72 in) 1285 mm (50.6 in) 1371 mm (54 in)

Sorting Grapple

18 525C Wheel Skidder specifications

Standard EquipmentStandard equipment may vary. Consult your Caterpillar dealer for details.

Power TrainAir cleaner, 2-stage with precleanerBrakes

ParkingService, four-wheel enclosed disc

Differential locks (front, rear)Driveline slipjoint, lubed for lifeEngine, Cat C7, ACERT Technology, ATAACFan, blowerFilters, fuel/engine air, primary/secondaryFinal drives, inboard planetaryFuel transfer pump (electric)Fuel tank, high capacityLock-up torque converterMufflerRadiator with clean-out doorsSteering, variable flow-modulated 1/4 turnTransmission, countershaft powershift (5F/3R)Universal joints, lubed for life

HydraulicsClosed center-load sensing systemHitch hoses, Caterpillar ToughGuard™Line filter, full flow returnHydraulic oil cooler, Spin-on filtersVariable displacement piston pump, 46 gal/min (174.1 L/min)

Other standard equipmentArticulation lock linkBrush sweeps, frontEcology drains (engine, hyd tank, axles, transmission)Engine enclosures, hingedGuards, hinged - bottom and radiatorSOSSM sampling portsVandalism protection, lockable doors and cap locks

Electrical24V electrical systemAlarm, back-upAlternator, 80 ampBatteries, maintenance free (2-1000CCA)Lighting system, exterior lights (4 total)Main disconnect switchStarter, electric, heavy dutyStarting and charging systemDiagnostic connectorHorn, warning

Operator Environment12V accessory power portSeat, air suspension

30° swivel, 3 position lockingSeat belt

Beverage holderCab, ROPS/FOPS certifiedComputerized Monitoring System

Instrumentation, Gauges:Engine coolant temperatureFuel levelHydraulic oil temperatureTachometerTorque converter oil temperature

Instrumentation, Warning Indicators:AutograbBrake oil pressureDifferential locksEngineEngine oil pressureLockup clutchParking brakePrimary steer pressureSecondary steer pressure (if equipped)Starting aidSystem voltageTransmission filter bypassWinch freespool (if equipped)Work lights

Instrumentation, Digital DataComputerized diagnostics and monitoringEngine rpmGear and directionOdometerService hour meter

Headliner, Floormat, and DomelightMirrors, rear view (2)Steering wheel, tilt and telescopingElectronic transmission mounted controls

19525C Wheel Skidder specifications

Optional EquipmentOptional equipment may vary. Consult your Caterpillar dealer for details.

LightsAdditional 8 (2 front, 2 rear, 2 per side)

Pre-cleaner, turbineStarting aid package, cold weatherSteering, secondaryTires and Tubes, set of four, logger (LS-2)

24.5 x 32, 16 PR30.5L x 32, 16 PR35.5L x 32, 16 PRDual ring capableNarrow overall width options

Water tankWinch

GrappleCable skidding

ArchDual functionSingle functionCable skiddingIndustrial arrangement

AxlesHeavy duty (wide tire/chains)Standard duty

BladeNarrow deckingWide decking

Cab, enclosed, with window screensROPS, openROPS, enclosed with heat/ACWindow screens

ElectricalConverter, high capacity 12V, 10A continuous, 15A peakJump start receptacle

Fenders, heavy dutyGrapples - Cat Continuous Rotation

BunchingSortingThinning

R

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Printed in U.S.A.

Materials and specifications are subject to change without notice.Featured machines in photos may include additional equipment.

See your Caterpillar dealer for available options.

CAT, CATERPILLAR, ACERT, ToughGuard, their respective logos and “Caterpillar Yellow,”as well as corporate and product identity used herein, are trademarks of Caterpillar and

may not be used without permission.AEHQ5670 (5-06)

Replaces AEHQ5391-01

525C Wheel Skidder