1995/05/01 Caterpillar

Improved Wiring Eliminates Hitch Control Fault 8 Code and Adds Additional Features{1408,5000,7314,1901}

Usage:

Challenger 65C (2ZJ),
Challenger 70C (2YL),
Challenger 75C (4KK),
Challenger 85C (9TK) Agricultural Tractors

Description of Change: A wiring harness change has been made leading to the 3 point hitch control group. Previously, the hitch control was powered during engine cranking. Occasionally, fault code 8 errors would be logged due to low voltage supply. The circuit has been changed to not power the hitch control during cranking.

Adaptable To: The wiring change is effective with Challenger 65C (2ZJ566), Challenger 70C (2YL243), Challenger 75C (4KK586), and Challenger 85C (9TK287) Agricultural Tractors. On earlier machines, the wiring may be modified as shown in the illustration to obtain power from the accessory circuit. The modification will cause the control to be non-powered during engine cranking.

Other changes include the addition of a cigar lighter in the right console and a T-Connection for obtaining radar signal when equipped with a performance monitor. The connection is located underneath the dash, on the right side just above where the wiring harness enters the cab. The outlet is a standard 4 pin connector and can be used by other OEM electrical controls to monitor true ground speed. See the Operation and Maintenance manual for wiring instructions.

Caterpillar Information System:

1995/04/24 Engine Connecting Rod Assembly Includes New Rod Eye Sleeve Bearing {1218,1219}

1995/04/24 Parts Are Now Available To Relocate The Relay Panel {1422}

1995/04/24 Tools for Disassembly and Assembly of Four Piece Axle Arrangements {0722,3250,3257,3259}

1995/04/24 Longer Gearshift Lever Improves Gearshift Operation {3070}

1995/04/24 Interface Seal Available For 70 Pin Connector Between Electronic Unit Injector (EUI) Wiring Harness And Electronic Control Module (ECM) {1408}

1995/04/24 Serviceable Parts For Custom Option Engine Prelube Group {1319}

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

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

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

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

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

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

1995/05/01 Undersize Bearing Cone Available For The Axle Housing Outer Wheel Bearing{4215}

1995/05/01 New Turbocharger Support Group Provides Improved Serviceability{1050,1052}

1995/05/01 Procedure To Tighten Bolts And To Shim Rear Drive Axle Is Available{3278}

1995/05/01 Use Correct Lubricants With Track Rollers And Idlers{4159,4180,7581}

1995/05/01 Engine Air Filters{1054}

1995/05/08 Brake Release Pump For Towing Is Available{4354}

1995/05/08 Serviceable Parts Available For Water Spray Pumps Used On Asphalt Compactors{5614}

1995/05/08 Selecting The Correct Turbocharger And Wastegate Orifice For 3500 Engines Used In 793 Trucks{1052,1057}

1995/05/08 Selecting The Correct Turbocharger, Wastegate Orifice, And Personality Module For 3500 Engines Used In 793B Trucks{1052,1057,1902}

1995/05/08 New Valve Cover And Valve Cover Base Assembly Used{1107,1120}

1995/05/08 Larger Bolts Provide Improved Bearing Retention For Increased Fan Bearing Life{1359}

1995/05/08 New Plugged Filter Indicator Switch Improves Service Life{7450}