1996/09/16 Caterpillar

New Transmission Bearing Improves Surface Fatigue Life {3030}

Usage:

Challenger 65 (7YC),
Challenger 65B (7YC1900-Up),
Challenger 65C (2ZJ),
Challenger 65D (2ZJ),
Challenger 70C (2YL),
Challenger 75 (4CJ),
Challenger 75C (4KK),
Challenger 85C (9TK) Agricultural Tractors

Description of Change: A new longer life bearing is now in production for Challenger 65D, Challenger 75C, and Challenger 85C Agricultural Tractors. The bearing is used in several locations in the transmission and increases the surface fatigue resistance over the previous design.

Adaptable To: The new 131-3919 Bearing is effective with Challenger 65D (2ZJ2072-2073, 2075, 2079-up), Challenger 75C (4KK2369, 2371-2374, 2376, 2379, 2381-up), and Challenger 85C (9TK1818-1834, 1836, 1856, 1858-up) Agricultural Tractors. The 131-3919 Bearing service is a direct replacement for the former 2K-1738 Bearing or the 6I-8641 Bearing.

Caterpillar Information System:

1996/09/09 A Chamfer Has Been Added To Some Engine Cylinder Head Bolt Holes To Help Reduce Stress Concentrations And Prevent Cracks{1101}

1996/09/09 Do Not Wash Hot Fuel Injection Pump With Cold Water{1251}

1996/09/09 A New Seal For Brake Piston Plug In Front Brake Groups (Caliper Disc) Has Been Released For Service Repair{4251,7555}

1996/09/09 New Plate Used For Tightening Fan Belts Which Use Alternator Assembly Belt Tighteners{1400,1358,1357}

1996/09/09 New Parts Available To Eliminate Wear Between The Oil Cooler Bonnet And The Elbow{1378,1380}

1996/09/09 Engine Block Provides Improved Grounding To Frame Grounding Cable{1201,1405,1406,7423}

1996/09/09 Machine Electronic Control Module Software Improvements{0700,0785,1901}

1996/09/02 Improved Starter Solenoid Assemblies Available {1467,1518}

1996/09/02 New Start Switch With Improved Moisture Resistance {1416}

1996/09/02 Service Parts Available For Hydraulic Controller {5466}

1996/09/02 Attachment Coupler "Z" Bar Linkage Improved {5133}

1996/09/02 Seal Added To Oscillation Bearing Joint {6604,3278}

1996/09/16 Brake Components Resized To Improve Heat Capacity {4250,4251}

1996/09/16 Rotated Extension Stick Cylinder Protects Cylinder Port {5057}

1996/09/16 New Lift Cylinder Group Uses Piston For Internal Stop {5102,7562}

1996/09/16 New Hinged Window Used In Right Front Side Of Operators Cab Allows Increased Air Circulation {7310}

1996/09/16 Snap Ring Retains Rod Wiper Seal In Several Hydraulic Cylinder Groups {7562,4303,5102,5104,5105,5106,5108,5141,5303,5352,5356,5452,5457,5458,5468,5555}

1996/09/16 Vibration Resistant LED Kit Available For Use With Back-Lit Rocker Switches {1429}

1996/09/16 New Plastic Outlet Sleeve Used On 3208 Engines {1380}

1996/09/16 New Hold-Down Bolts For The Sleeve Metering Fuel System (SMFS) Governor Housing {1251}

1996/09/16 Caterpillar High Efficiency Fuel Filters Help Provide Maximum Fuel Pump And Fuel Injector Life {1261}

1996/09/23 Improved Radiator Shunt Hose Routing/Fittings Allows Common Hose{1380}

1996/09/23 Improved Air Compressor Bracket Eliminates Excessive Clearance{1803}

1996/09/23 New Wheel Assembly Used To Improve Service Life{4208}