794 AC Off-Highway Truck Engine Supplement Caterpillar


Refrigerant Compressor - Remove and Install

Usage:

794 AC HRT

Removal Procedure

------ WARNING! ------

Hot engine components can cause injury from burns. Before performing maintenance on the engine, allow the engine and the components to cool.


------ WARNING! ------

The Power Train Electric Drive System and the Accessory Power System will contain hazardous voltage levels during machine operation and for a period of time after machine shutdown.

Do not remove any covers that will expose energized electrical components while the engine is operating. Do not remove any covers that will expose the energized electrical components while the components remain energized following an engine shutdown.

Do not perform any type of electrical maintenance on the orange hazardous voltage conductors, the power train components or the accessory power system components while the engine is operating.

Do not perform any type of electrical maintenance on the orange hazardous voltage conductors, the power train components or the accessory power system components while the components remain energized following an engine shutdown.

Always perform the safe shutdown and de-energizing procedure before performing electrical service on the Power Train Electric Drive System or the Accessory Power System.

Failure to follow these instructions could result in personal injury or death.


------ WARNING! ------

Personal injury can result from contact with refrigerant.

Contact with refrigerant can cause frost bite. Keep face and hands away to help prevent injury.

Protective goggles must always be worn when refrigerant lines are opened, even if the gauges indicate the system is empty of refrigerant.

Always use precaution when a fitting is removed. Slowly loosen the fitting. If the system is still under pressure, release it slowly in a well ventilated area.

Personal injury or death can result from inhaling refrigerant through a lit cigarette.

Inhaling air conditioner refrigerant gas through a lit cigarette or other smoking method or inhaling fumes released from a flame contacting air conditioner refrigerant gas, can cause bodily harm or death.

Do not smoke when servicing air conditioners or wherever refrigerant gas may be present.

Use a certified recovery and recycling cart to properly remove the refrigerant from the air conditioning system.


  1. Prepare the machine for maintenance. Refer to Operation and Maintenance Manual , "Prepare the Machine for Maintenance".

  2. Shutdown and de-energizing the machine. Refer to Operation and Maintenance Manual, "Electrical Shutdown and Voltage Discharge".

  3. Recover the air conditioner refrigerant from the air conditioner system. Refer to Service Manual, SENR5664, "Air Conditioning and Heating Systems with R-134a Refrigerant" for the procedure. Refer to Special Publication, NEDG2500, "Air Conditioning Tools" for the correct tools.


    Illustration 1g02028695

  4. Disconnect hose assemblies (1).


    Illustration 2g02028696

  5. Disconnect harness assemblies (2).


    Illustration 3g02028703

  6. Remove guard assemblies (3).


    Illustration 4g02028706

  7. Remove belt (4). Remove bolts (5) and bracket (6). Remove compressor (7).

Installation Procedure

  1. Install compressor (7) in the reverse order of removal.

Caterpillar Information System:

QUICK COUPLERS Coupler Hydraulic System
745 Articulated Truck Crankshaft Vibration Damper - Inspect
C175 Tier 4 Final Engines for Caterpillar Built Machines Alternator - Remove and Install
Adjusting the Armbar and Controls Height on D-Series SSL/MTL/CTL {7307, 7312} Adjusting the Armbar and Controls Height on D-Series SSL/MTL/CTL {7307, 7312}
C7 and C9 Industrial Engines Cat Data Link - Test
745 Articulated Truck Cooling System Water Temperature Regulator - Replace
2014/10/14 The Integrated Tool Carrier (IT) Coupler Has Been Improved for F Series Backhoe Loaders {6129}
785G Off-Highway Truck Systems Control Manifold (Brake Accumulator Charge)
826K Landfill Compactor, 825K Soil Compactor and 824K Wheel Dozer Machine Systems Accumulator Charging Valve (Brake) - Remove and Install
785G Off-Highway Truck Systems Bypass Switch (Brake Oil Filter)
MH3037 Material Handler Machine Systems Cab Riser Cylinder - Remove and Install - Up/Down
Backhoe Loader E and F Series Battery Group Dead Cell{1401} Backhoe Loader E and F Series Battery Group Dead Cell{1401}
794 AC Off-Highway Truck Engine Supplement Electric Starting Motor - Remove and Install
826K Landfill Compactor, 825K Soil Compactor and 824K Wheel Dozer Machine Systems Accumulator Charging Valve (Brake) - Disassemble
785G Off-Highway Truck Systems Pressure Sensor (Parking Brake Oil)
794 AC Off-Highway Truck Engine Supplement Damper - Remove and Install
785G Off-Highway Truck Systems Pressure Sensor (Brake Oil Accumulator)
794 AC Off-Highway Truck Engine Supplement Belt Tightener - Remove and Install
745 Articulated Truck Engine Oil Level - Check
950M and 962M Wheel Loaders Power Train, Steering, Braking, Hydraulic, and Machine Systems Pressure Limiter (Auxiliary Valve) - Check and Adjust
A New Communication Adapter Cable As Is Now Available For Certain Cat Products {0785} A New Communication Adapter Cable As Is Now Available For Certain Cat Products {0785}
C7 and C9 Industrial Engines Coolant Level - Test
2015/07/07 New Software Is Now Used On Certain M Series Motor Graders {1920, 7620}
C7 and C9 Industrial Engines Electrical Power Supply - Test
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.