1988/08/29 Caterpillar

New Drain Port In Torque Converter Filter Base {3164,3169}

Usage:

776B Tractors;
777B, 785, 789 Trucks

Description of Change: For a period of time, the torque converter filter base on the above machines did not contain a drain hole. This drain has been reinstated. The new drain port has a small O-ring plug, and is located in the bottom of the filter base opposite the mounting bracket. (The previous drain plug was on the side of the filter base.) Thus, oil in the filter housing can be drained when the filters are changed and minimize the possibility of getting foreign material in the torque converter and its valves.

Adaptable To: The drain plug is a part of the 4T4760 Filter Group and this group number did not change. The plug is effective with the following PIN's:

776B Tractor: 6JC70

777B Truck: 4YC581

785 Truck: 8GB270

789 Truck: 9ZC162

The interim machines that do not have the drain plug can be modified so a drain plug can be installed. Obtain a 9J6419 Adapter and add a drain hole as shown.

Machining dimensions for the drain hole plug with a seal that can be added to the 9J6419 Adapter.

Install the adapter in the inlet line at the filter base. Use four 8T9389 Bolts, one 7F8267 Seal, and one 9S4182 plug.

Caterpillar Information System:

1988/08/29 Static-Type (Nonsuspension) Seat Available {7312}

1988/08/29 How To Determine If Relays Are Functioning Correctly {1400,1422}

1988/08/22 New Alternator With Built-In Regulator Used{1405}

1988/08/22 Improved Turbochargers Used{1052}

1988/08/22 New Fuel Tank Repair Kit Available For Repairing Plastic Or Nylon Fuel Tanks{0649,1273}

1988/08/22 Steering Lock Clamp Used Instead Of Link And Eyes To Prevent Machine Articulation{7050,7058}

1988/08/22 New Speed Switch Used In Torque Converter Lockup Circuit{3104,7300}

1988/08/22 New Hour Meter Film (Decal) Available For Challenger 65 Tractors{7480}

1988/08/22 New Hydraulic Quick Coupler Assembly For Implements{5057}

1988/08/22 New Mounting Brackets For Hydraulic Hose Bulkhead Fittings Used In Sliding Frame Group{5057}

1988/08/22 Additional Parts Now Needed To Convert To Four Wheel Drive{3176,3250}

1988/08/22 New Detent Springs Used In Direct Drive Transmission Groups{3070}

1988/08/29 New Front Suspension Cylinder Rod Has Longer Service Life {7201}

1988/08/29 Use 6V6640 Sealant For Gasket Material In Transmissions And Differentials {3006,3200,3258,7555}

1988/08/29 New Fuel Injector Group Used {1251}

1988/09/05 New Rocker Arm Shaft Assembly and Bolts Used{1102}

1988/09/05 New Piston Cooling Jets Used{1331,1200}

1988/09/05 Improved Engine Exhaust Manifolds Used{1059}

1988/09/05 New Oil Level Gauge Used{1326}

1988/09/05 Pressure Taps Added To Hoist Oil Lines Group{5083,5057}

1988/09/05 Lists Of Duo-Cone Seals And Oil Recommendations{3258,4050,4208}

1988/09/05 Aerosol Dry Film Lubricant Available for Extension Sticks{0645,6502}

1988/09/05 New Stabilizer Valve Group Has New Lock Valve{6505}

1988/09/05 New Thrust Washer Used In Six Wheel Drive Transfer Gearbox{3250}