1982/04/12 Caterpillar

New Clearance Specification Used In Torque Converter{3101}

Usage:

776 Tractors;
777 Trucks

Description of Change: The specification for the clearance between the front end of the torque converter shaft and the retainer plate has been changed. The new specification of 0.05 mm to 0.13 mm (.002" to .005") clearance will put less stress on the retainer plate bolts. To make it possible to get this new clearance specification, it was necessary to release a new shim. The new shims are 0.08 mm (.003") thick. These shims are used, as necessary, to get the desired clearance between the retainer plate and the shaft.

Formerly, a clearance of 0.05 mm to 0.25 mm (.002" to .010") was used. This amount of clearance caused too much stress to be put on the bolts and too much distortion of the retainer plate. The former shims were 0.25 mm (.010") thick.

Adaptable To: The new 1T1643 Shim and the new clearance are in effect on 776 Tractors (14H165) and 777 Trucks (84A1018). They are adaptable to Serial Numbers 14H1-Up and 84A1-Up. The former 1T1251 Shim is no longer used in this application. Make a note of this change in Power Train Specifications module, Form SENR7157-04, page 6. This module is part of 776 Tractor and 777 Truck Service Manual, Form SENR7153.

Caterpillar Information System:

1982/04/05 New Outer Duo-Cone Seal Groups Used In Service And Parking Brake Groups{4208,4251,4267}

1982/04/05 Lubricant Recommendations Have Been Changed For Vehicular Products{0680,0374,0375,3004,1318,5060}

1982/04/05 Use FT1631 Flare Nut Wrench For Connector In Bulldozer Lift Circuit{0610,0611,0623}

1982/03/29 Twisted Port Plate Can Cause Excessive Case Drain From Piston Pump Or Motor{5058,5070}

1982/03/29 Increased Clearance Between Hoist Cylinder Assembly And Rod{5102,7258}

1982/03/29 Multi-Piece Wheel Rims; Caution Must Be Used{4202,4201}

1982/03/29 FT1667 And FT1668 Beam Assemblies For Undercarriage Removal{0642,0643,4150}

1982/03/29 Location Of Sending Unit Changed To Improve Accuracy Of Water Temperature Indication{7453}

1982/03/29 Parts Book Changes{0374}

1982/03/22 Correct Use Of 6V2023 Flow Check Adapter Group Is Important To Prevent Damage To An Engine{0651,0654,1250}

1982/03/22 New Bracket Prevents Damage To Horn Wires{7303}

1982/03/22 Caterpillar Electric Starting Motors{1453,1407}

1982/04/12 Use Correct Part Numbers For Main And Connecting Rod Bearings{1230,1203,1219}

1982/04/12 Lock Screw For Threaded Crown On Hydraulic Cylinders No Longer Used{5000}

1982/04/12 New Spring Used In Accumulator Charging Valve Group For Brakes{4264}

1982/04/12 Make Sure Hydraulic Pumps Are Installed Correctly{5055,5070,5073}

1982/04/12 Use Correct Size Bolt To Install 5P9736, 6V2156 Or 6V2157 Link Brackets{0644}

1982/04/12 Correct Position Of Shims In Blade Lift And Centershift Cylinder Groups{5102,5223}

1982/04/12 Use 6V4938 Seal Guide For Seal Installation On Hydraulic Cylinder Rod{0622,5458}

1982/04/12 Add Lubricant For Motor Shaft Bearing{5058,5200}

1982/04/19 New Brackets Used In Front Floodlamp Lighting Group{7309}

1982/04/19 Improvements Made To 6V3000 Sure Seal Repair Kit{0611,1408}

1982/04/19 New Relief Valve For Steering System Is Easier To Adjust{4322}

1982/04/19 New Broken Link Spring Used In Governor{1264}