1995/03/20 Caterpillar

New R-134a Air Conditioning For Backhoe Loaders{7320}

Usage:

416B (8ZK1777-Up, 8SG5327-Up),
426B (5YJ1546-Up),
428B (7EJ2812-Up),
436B (6MJ650-Up),
438B (3KK1136-Up) Backhoe Loaders

SUPPLEMENT: 05/01/ 95

Service Magazine; March 20, 1995; Page 3; "New R-134a Air Conditioning For Backhoe Loaders".

This article also applies to the 426B (6KL1-UP) and 436B (7FL1-UP) Backhoe Loaders. Please add these models to the list of applicable models shown with the article.

--------------- END SUPPLEMENT ---------------

The B-Series Backhoe Loaders are now using the R-134a Air conditioning. The current parts manuals do not show the new R-134a air conditioning system. The following charts and illustrations can be used to identify the parts of the air conditioning system pending update of parts manuals.

Illustration 1. 9R-9744 Air Conditioner Lines Group.

Illustration 2. 7E-7715 Refrigerant Compressor Group.

Illustration 3. 9R-8020 Air Conditioner Wiring Group.

Illustration 4. 8Y-8609 Air Conditioner and Mounting Group.

Caterpillar Information System:

1995/03/20 Caterpillar Standards for Electrical Schematics{1400}

1995/03/13 List of Information Release Memos on Cat® Remanufactured Products Since July 1993{7754,0374,0376}

1995/03/13 New Intermediate Cylinder Assembly Is Used In The Hoist Cylinder Group{5102}

1995/03/13 New Air Cleaner Group Uses Radial Seal Air Cleaner Elements{1051,1054}

1995/03/13 Alternator And Air Conditioner Pulley Guards Are Now Available{7168,7320,7174}

1995/03/13 Smaller Slot In The Neutral Start Switch Plate Increases Service Life Of Neutral Start Switch{1424}

1995/03/06 "Narrow Flange" Cylinder Liner Available For Service Repair {1216,1201}

1995/03/06 Jacket Water Pumps Now Include New Tapered Roller Bearings {1361}

1995/03/06 Cracks In Phenolic Water Pump Impellers In Remanufactured Water Pumps {1364}

1995/03/06 Charge And Differential Pump Group Repair Kit Contents {4130,4134,4344}

1995/02/27 Installation Instructions For Pump Drive Coupling {3279,3252}

1995/02/27 Oscillation Shaft Now Induction Hardened {6604}

1995/03/20 New Wheel Rim Assembly Provides Clearance Between The Brake Caliper And Valve Stem For Inflation{4201,4202}

1995/03/20 Steering Tank Screen Is Furnace Brazed For Longer Service Life{4332,5068}

1995/03/20 Improved Tube Assemblies & Bracket Used To Prevent Leaks{4324,4304,4307}

1995/03/27 All-inclusive Electrical Schematic Listing{1400}

1995/03/27 New Crankshaft Damper Assembly Used{1205}

1995/04/03 New Final Drive Bearings Give Longer Service Life And Are Easier To Install{4055,4092}

1995/04/03 Improved Piston Assemblies Prevent Cylinder Assembly Damage{5102}

1995/04/10 New Splined Circle Drive Group Provides Improved Performance {5207}

1995/04/10 Procedure To Increase Fuel Transfer Pump Pressure {1256}

1995/04/17 Move Turbocharger Boost Sensor Block To Allow Relocation Of Air Compressor Inlet Hose{1800}

1995/04/17 A Larger Air Compressor Has Been Added To Provide Increased Air Flow Rate{1800}

1995/04/17 Reduce Air Compressor Operating Cycles By Using Boosted Air Pressure From Air Inlet Manifold{1800}