1982/04/12 Caterpillar

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

Usage:

All 3400 Series Engines

Some servicemen have not been sure which main and connecting rod bearings to order for use in 3400 Series Engines. The reason for this is that they have at times tried to order the part number shown on the bearing itself or they have checked for that number in the Numerical Parts Record (NPR) and it was not listed.

This has happened with the 1N3542 Main Bearing and the 9N6321 Connecting Rod Bearing. These bearings were used for a short period of time and are not currently used at the factory. A replacement for them is the 8N5421 Main Bearing and the 8N5426 Connecting Rod Bearing. The NPR will be corrected to show the former bearings and their replacements.

The Parts Books show the correct bearings to be used in these engines. Always use the microfiche Parts Books because they will show the latest parts to be used in each application.

Caterpillar Information System:

1982/04/12 New Clearance Specification Used In Torque Converter{3101}

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}

1982/04/12 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}

1982/04/19 New Seal In Transfer Gear Group{3176,3159}