1989/08/21 Caterpillar

New Connecting Rod Bearing Used{0372,1203,1219}

Usage:

3400 Family Of Engines

Reference: See next article, "Connecting Rod Bearing Maintenance".

Description of Change: A new connecting rod bearing is now used in the 3400 Family of Engines. This bearing uses a stronger aluminum alloy that is more resistant to cavitation erosion and to aluminum fatigue than the former bearing.

Adaptable To: The new bearing is effective with the following serial numbers.

The new 9Y9497 Bearing can be used as a direct replacement for the former 1W7524 Bearing in the 3400 Family of Engines. This includes all these engines built after 1975. The bearing part number is stamped on the backside.

Bearing kits that have six standard size bearings are available, as well as undersize bearing kits and undersize bearings. See illustration.

One of the new bearing kits for six cylinder engines.

Caterpillar Information System:

1989/08/21 Improved Head Gasket Used; Summary Of Earlier Gaskets And Service Tips{1124,1216,1221}

1989/08/14 New Watercooled Exhaust Manifolds{1059}

1989/08/14 New Oil Change Recommendations For Severe Applications{0374,1302}

1989/08/14 New Coolant Conditioner Elements Available{1352}

1989/08/14 Worldwide Service Directories Available For Marine, Petroleum, Power Generation Products{0354,0370,0374,0375,1022,4450}

1989/08/07 Do Not Reuse Clutch Housing Bolts {3360,3305,3306}

1989/08/07 Temperature Sensor Pocket Kit Available For Danfoss® Temperature Contactors {1350,7403}

1989/08/07 Improvements To Attachment Altronic® Ignition Systems {1550,1555,1558,1567}

1989/08/07 Pedal-Mounted Throttle Sensor Requires New Personality Module {1265,1705,1707}

1989/08/07 Replacement Parts For Magnetos Discontinued On Gasoline Starting Engines {1530,1500}

1989/07/24 New Cylinder Head Gasket Kit Available{1101,1216}

1989/07/24 Improved Control Rod Assembly Used In Fuel Injection Control Groups{1298}

1989/08/21 Connecting Rod Bearing Maintenance{0372,1203,1219}

1989/08/21 Use New Operation And Maintenance Manuals{0374,0375,1000}

1989/08/21 Additional Clamp Added To Aftercooler Water Line{1380}

1989/08/21 Lube System Screen Assembly Available For Use During Dynamometer Testing{1307}

1989/08/21 New Engine Oil Cooler Core Groups With Rubber End Sheets Used{1378}

1989/08/28 Recommendations For Lubrication Oils In Powershift Transmissions{0645,3150,3179}

1989/08/28 New Fuel Injectors Available For Parts Service{1290}

1989/09/11 Be Sure To Tighten Fuel Injection Line Clamps To The Correct Torque{1252}

1989/09/11 Plasma Top Piston Rings Replace Chrome Rings{1215,1214}

1989/09/18 Radio Interference With Electronic Control Systems{7338}

1989/09/18 Tightening Procedure For Turbocharger Compressor Nut{1052,1060}

1989/09/18 New Design Alternator Belt Used{1405,1406}