XAS185 CD7 Compressors 1. Scott Ellinger.

XAS185 CD7 Compressors

Scott Ellinger

PRODUCT FEATURES

Hard Hat VersionMade from polyethylene material that does not dent or rust

Removable side and end panels for easy service

Rear mounted controls and discharge valves

The only metal part is the front baffle

Standard VersionSteel construction

Removable side and end panels for easy service

Same rear mounted control panel

Product nomination and grouping Principle data Compressor systems:

Compressor running conditions:

Electrical system Instrument panel

XAS 185 CD7

Air systemOil systemRegulating systemElectrical system

UnloadLoadBlow-down

Product Nomination Oil Injected CompressorsNomination and

grouping Principle data Compressor systems Running conditions Electrical system Instrument panel

X A S 185 C d

Product rangeX : Oil injected portable compressor

Working principleA : Single stage compressorR : Two stage compressor

Working pressure

: standard pressure 102psiT : “ten” pressure 150psiH : high pressure 175psi

Silencing : Un-silencedS : Silenced

Capacity (FAD)Liter/secCFM (US-version)

Engine supplierC : CaterpillarD : DeutzJ : John DeereY : YanmarK : Kabota

Prime moverd : diesel engineE : electric motor

Principle DataNomination and


Compressor Systems

4 major systems Air system Oil system Regulating system Electrical system

Nomination and grouping Principle data Compressor systems Running conditions Electrical system Instrument panel

Air system

Air System

Air filter

Unloading valve

Compressor element

Check valve

Air receiver

Minimum pressure nozzle

Air outlet valve


Air Filter

Air inlet Centrifugal separation

Dust

Filter element

to compressor element

Vacuum indicator1310 0348 91


Air Filter

Filtration of the inlet air in 2 stages :– Centrifugal dust separation– Paper filter element– Optional safety element– Air filter vacuum indicator

– Safety Filter XAS 185 1310 0343 81 Comp1310 0303 10 Eng

Unloading Valve

Opens and closes the air inlet to the compressor element.– Open position at load condition

=> Air consumption– Closed position at no load condition

=> No air consumption.

Valve is controlled by the regulating pressure.


Unloading Valve

Valve

Spring loaded

Regulating pressure Air inlet

Integrated blow-down valve

Vent Hole


Compressor Element

Oil

Oil

Air/Oil

Air inlet


Check Valve

Check valve is integrated in the unloader for Series 7 compressors.

Closed when the compressor is stopped.

The air receiver is pressurized, which would result in a reverse air flow. the check valve prevents this.


Check Valve

LOAD

Check valve

SHUT-DOWN

Receiver pressureWhen compressor is shut-

down


Valve Part # 1615 7667 82

Air Receiver

Air/Oil

Centrifugal Separation

Air outlet


SeparatorElement

Minimum Pressure Nozzle

Guarantees a minimum pressure in the receiver tank (approx. 45 – 60 psi)

Minimum pressure is required to guarantee a continuous oil supply to the element.

NOZZLE


OIL SYSTEM

Oil System (old style)

Air receiver

Oil cooler

Oil filter

Compressor element

Oil separator

Scavenge line


Oil System (new style with TBV)

Air receiver

Oil cooler

Oil filter/TBV

Compressor element

Oil separator

Scavenge line


Air Receiver

Oil flow

Pressure


Oil Cooler

Warm Oil

Cooling air


Cool Oil

Oil Temp Should Have A 40 F (22C) Drop Through The Cooler

* Use Proper Oil and Filters

º

Oil Filter

Dirty Oil Filtered Oil

By-pass valve


Part # 2914 5050 00

By pass valve opens at 36psi

Ensures sufficient lubrication and cooling even if the filter gets clogged

Compressor Element

Oil Air/Oil

Lubrication to the bearingsAir inlet


Scavenged oil

Oil Separator & Scavenge Line

Air/Oil

Centrifugal separation

Separator Element

Oil

Scavenge line


When changing the separator element the retainer must be cleaned

Also works as ground

•Centrifugal force removes about 85% of the oil

•Change of direction, about 99% of the oil

•Separator element, less than 3 ppm oil content

Oil Separator

Classic Reasons For Oil Carryover– Over filled receiver– Plugged scavenge line– Wrong type of oil (no anti foam agent)– Shut down with air outlet valves open– Scavenge tube installed improperly

Separator Element Part Number 2911 0068 00

REGULATING SYSTEM

Regulating System

Regulating valve

Unloading valve

Speed regulator

Blow-down valve

Safety valve

Regulating Valve

Unloading Valve

Speed RegulatorSafety Valve


Regulating Valve

Regulates the effective pressure in the air receiver

Provides regulating pressure to :– unloading valve

=> regulates the air inlet according the air requirements

– speed regulator=> regulates the engine speed to reduce fuel consumption

Regulating Valve Part Number 1615 7664 80


Regulating Valve

LOAD UNLOAD


Receiver Pressure

Pressure Gauge

Adjusts Unload Pressure:

*with outlet valve closed to 115psi Control

Pressure

To speed regTo unloading valveTo blow down

valveScavenge line

Unloading Valve

Opens and closes the air inlet to the compressor element.– Open position when running loaded

=> Air requirements– Closed position at no load condition

=> No air requirements


Unloading Valve

LOADUNLOAD

Reg

ulat

ed p

ress

ure

Air inlet


Air Inlet

Unloading Valve – Cut Away

Speed Regulator

Regulates the engine speed in relation to the required air flow

Unit will adjust the engine speed to match air demand

Load condition : maximum engine speed

Unload condition : minimum engine speed (Idle Speed)

Speed Regulator Actuator part number 1310 0305 73


Speed RegulatorNomination and


Orifice

Control air

Speed regulator extends to provide maximum throttleRetracts under no load to reduce throttle and save fuel

Blow Down Valve

Integrated in the unloading valve

Blows off the air receiver pressure once the compressor has shut-down=> this is to depressurize the receiver tank


Blow Down Valve

LOAD / UNLOAD BLOW-DOWN

Blow-off receiver pressure


Receiver PressureReceiver pressure

blow-down valve

Safety Valve

Protects the compressor and engine.

Blows off the air receiver pressure when it exceeds the preset value.

XAS 185 CD - 150 PSI


Compressor Running Conditions

Major running conditions :

– UNLOADReceiver tank pressurized, no air being used

– LOADReceiver tank pressurized, air is being used

– BLOW-DOWNMachine stopped, blow-off of receiver pressure


Electrical System

Electrical System

12 Volts Dc Alternator has built in voltage regulator

– B+ Positive to recharge battery– B- Ground– W Frequency for tachometer (if equipped)– D+ Ground when alternator is turning less than

650RPM12 Volts when turning more than 650RPM


Electrical System

Starting system– cuts-out starter motor when engine is running

Safety shut-downs– Compressor :

Compressor element outlet temperature (248ºF/120 C)– Engine :

Coolant temperature (221ºF/105 C) Oil pressure (17psi) Low fuel level (5%) Alternator not charging Fail safe as a loose wire will result in a shut-down

Good electrical contacts are important


Electrical System / Std UnitNomination and


Control Panel

Comp Temp LampGeneral Alarm Lamp

Ignition Switch

Control panel isMounted at therear of the unit

More visible and user friendly

Control Panel

Fuel GageWorking

Pressure Compressor

temp

General alarm

Ignition Switch

Hour Meter

Test /

Cold Start

10 AMP Circuit Breaker Behind Control Panel

Service Kits

XAS 185 CD

Kit number Designation– 2911 0051 00 Unloader– 0665 0999 54 Piston Seal– 2911 0068 00 Oil separator

Preventive Maintenance Kits

MaintenanceDAILY Check engine oil level

Check compressor oil level

Check air filter vacuum indicator

Empty air filter dust trap

Maintenance

50 HOURS

Check battery terminals and charge

Check tire pressure / re-torque wheel lug nuts

Check drawbar bolts

Check for leaks in the air, fuel, and oil system

Check engine minimum / maximum speeds

Lubricate door hinges / locks / etc.

Maintenance

250 HOURS Perform 50 hour maintenance plus:

Change engine oil and filter Clean the oil cooler / radiator Clean fuel tank

Change fuel filters

Maintenance

500 Hours/Annually

Perform the 250 hour maintenance plus:

Change compressor oil and filter

Replace the air filter elements

Maintenance

1000 Hours/Annually Perform 500 hour maintenance plus:

Adjust valves on engine

Replace Air oil separator Test safety valve

Test operation of engine and compressor safety switches and relays

Repack or Grease wheel bearings

Special Torque values

Wheel nuts 59 lb.ft (+7-0) Axle - beams 59 lb.ft (+/-7)Drawbar - axle 59 lb.ft (+/-7)Drawbar - bottom 59 lb.ft (+/-7)Towing eye - drawbar 59 lb.ft (+/-7)Lifting eye - flywheel housing 151 lb.ft (+15/-0)Engine - drive housing (M12) 59 lb.ft (+/-7)Engine - drive housing (M14) 92 lb.ft (+/-7)Compressor - drive housing 59 lb.ft (+/-4)Safety switches 26 lb.ft (+/-4)

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Contact Numbers•Main Number Atlas Copco Technical Support 800-732-6762 Option 3

•Ed Kukfisz – Compressors – Supervisor 281-542-2562 direct & 832-385-4697 mobile

•Andrew Stevenson – Compressors: Low Pressure720-479-2486 direct & 404-751-6717 mobile

•Andrew Calendar – Compressors: High Pressure720-479-2487 direct & 404-242-6203 mobile

•Scott Ellinger – Compressors720-479-2476 direct & 720-375-1795 mobile

•Robert Walsh – Generators – Supervisor 803-487-0256 direct (mobile)

•Will Hudson – Generators/Compressors 800-732-6762 Ext. 12920 & 832-454-8123 mobile

•Brandon Hobbs – Hydraulic Attachments /Handheld Construction Tools – Supervisor 303-287-8822 direct & 913-424-4039 mobile

•Al Eckenfels – Hydraulic Attachments/Handheld Construction Tools800-760-4049

Committed tosustainable productivity.

XAS185 CD7 Compressors 1. Scott Ellinger.

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