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 Pressure Regulator Group Now Available For Parts Service{3152,3185,3166,3012}

1982/04/05 Reminder: Check Valve Lash Adjustment At Correct Intervals{1102}

1982/04/05 Conversion Of 49-State 3406 Truck Engine From 283 kW (380 hp) To 298 kW (400 hp) Arrangements{1000}

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

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

1982/03/29 New Regulator Group Increases Coolant Flow To Cab Heater, Prevents Overcooling{1355}

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

1982/03/29 Flywheel Adapters For Dynamometer Testing{1156,0652}

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 Improved Plunger And New Spring Used In Mechanical Shutoff Group{7418}

1982/03/22 Use FT1614 Cover To Protect Center Shaft Assembly{0622,3305,3306,3302,3307}

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

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

1982/04/12 New Seals Improve Pressure Regulator Group{3185,3012}

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

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

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

1982/04/26 Improved Relief Valve Guide Decreases Maximum Oil Pressure During Cold Weather Starts{1315,1304}

1982/04/26 Expansion Tank Changed To Permit Installation Of Water Level Gauge{1354,7470}

1982/05/03 6V4960 AC Current Probe Will Measure Current Easier{0652}

1982/05/03 Use New Special Instruction To Install 5P6595 Insert In Cylinder Liner Seats{1216,0621}

1982/05/03 New 6V4950 Injection Line Speed Pickup Group Used With 6V2100 Multitach{0651}

1982/05/03 Lubricant Recommendations Changed For All Caterpillar Engines To Combat Effects Of Fuel Sulfur{1318,0375,0374,1280}