1994/10/31 Caterpillar

Using The Correct Air Conditioner Compressor Oil{1802,7320}

Usage:

All Caterpillar Products Equipped With Air Conditioners

Reference: Service Manual; SENR3334-02; Air Conditioning And Heating.

Reference: Service Manual; SENR5664-01; Air Conditioning And Heating Systems With R-134a Refrigerant.

Reference: Special Instruction; SEHS9734; Retrofitting R-12 Air Conditioning To R-134a Refrigerant.

It is important that the correct air conditioning oil be used for the system being serviced. The correct oil for the type of system and compressor is shown in the following charts.

When installing a new or remanufactured compressor on a machine that had previously been retrofitted from R-12 to R-134a refrigerant, the oil must be drained from the new or remanufactured compressor and replaced with 177 mL (6 fluid oz.) of 4C-2960 Oil (Ester) to be compatible with the ester oil already in the system.

A retrofitted R-134a system may be identified by the retrofit label attached to the compressor block with tie-wraps, and by the 110-6395 Film over the original compressor label.

Caterpillar Information System:

1994/10/31 New Instrument Panel Groups With Improved Light Bulb Retention Can Be Installed{7451}

1994/10/31 Wear Limits For Steering Linkage Ball Studs {4329,4318,4305}

1994/10/24 Automatic Ether Starting Aid Systems And Engines Equipped With Electronic Unit Injection (EUI){1456}

1994/10/24 New Seals Extend Life of Fuel Transfer Pump{1256}

1994/10/24 Correct Installation of Front Gear Train Idler Shaft{1237}

1994/10/24 New Parts Service Bearing Available For The A-frame Head Mounting Arrangement{7200}

1994/10/24 Transmission Control Group Has Been Changed To Improve Gear Selection{3156}

1994/10/24 Transmission Filter Group Has Been Moved To Improve Serviceability{3154,3179}

1994/10/24 Bolts Used In The Steering Linkage Group{4305}

1994/10/24 Lubrication Oil Recommendations Have Been Changed For Caterpillar Off-Highway Trucks And Tractors{0374,0375}

1994/10/17 Remanufactured Crankshaft Interchangeability; Remanufactured "Upgrade To New" (UTN) Availability{1202}

1994/10/17 New Rear Crankshaft Seal Groups Available{1161}

1994/10/31 New Piston Crown Assembly Used In Piston Group{1214}

1994/10/31 Verification of Connecting Rod Eye Bushing Retention When Overhauling Engines{1218}

1994/10/31 New Arm Assembly Used In Belt Tightener Groups{1358}

1994/11/07 Two New Manifold Sections Used In Upper Water Lines Group{1380}

1994/11/07 New Stiffer Tube Assembly Used In Air Compressor Lines Group{1803,1380}

1994/11/14 New Stronger Muffler Assembly Available For Part Service{1062}

1994/11/14 New Precleaner Base Provides Better Seal Around Air Filter Inlet Port{1050}

1994/11/14 Hydraulic System Instability In The Hoist Second Stage Can Be Eliminated{5051,5057}

1994/11/14 Correct Hydraulic Tank Breather Must Be Used To Prevent Oil Loss{5056}

1994/11/14 New 24 Volt Halogen Lamp Groups And Lamp Guards Available{1429}

1994/11/21 New Oil Cooler Group{1374}

1994/11/21 New Air Dryer Check Valve Assembly Used{4285}