1985/01/14 Caterpillar

New And Improved Gaskets In Front Housing Group And Accessory Drive Group {1151,1150}

Usage:

3406 Industrial Engines ( 90U ),
3406 Marine Engines ( 91U ) And 3406 Truck Engines ( 92U)

Description of Change: The new gaskets used in the front housing group are made from a different material than the former gaskets. The new gasket material will provide improved sealing.

The accessory drive group gasket has been improved by adding a raised area (bead) to the cross section of the gasket. This will provide a better seal and reduce the possibility of oil leakage.

Adaptable As: The new gaskets used in the 4N3911 Front Housing Group are direct replacements for the former gaskets which are canceled. The chart shows the new and former gasket part numbers.

The part number of the improved gasket used in the 4N2264 Accessory Drive Group has not changed. It is the 4N3854 Gasket.

Caterpillar Information System:

1985/01/14 Minimize Fuel Problems In Cold Weather Operation {1280,1250}

1984/12/10 Bonnet Of Fuel Injection Pump Group Now Serviced Separately{1251,1250}

1984/12/10 Additional Clamp Reduces Vibration Of Turbocharger Oil Supply Line{1050,1052,1053}

1984/12/10 Improved Turbocharger Oil Drain Elbows{1307,1052}

1984/12/10 Addition Of Lubricator Will Help Prevent Corrosion In Air Prelube Motors{1319}

1984/12/10 New Seal Used In Alternator Mounting Group{1405,1400}

1984/12/10 A Soot Filter Is Available For Use With Air Cleaners{1054}

1984/12/10 Improved BrakeSaver Seals Available{1155}

1984/12/10 New Air Pipe Retainers Used To Connect Turbocharger To Aftercooler{1052,1063}

1984/12/10 New 76.6°C (170°F) Water Temperature Regulators Used In Inlet Controlled Cooling Systems{1355,1350}

1984/12/10 Starters That Remain Engaged After Engine Is Running{1453}

1984/12/10 Lubrication Decals (Films) Are No Longer Used On Machines{7557}

1985/01/14 Install Different Body Assembly In Clutch Group To Correct Harsh Shifting {3312,3302}

1985/01/14 Remanufactured Air Fuel Ratio Controls {1278,7754}

1985/01/14 Remanufactured 1160 Engines Now Use Sleeve Metering Fuel Systems {1250,1286}

1985/01/14 Additions To Reference Chart For Major Production Changes {0374,0375,1000}

1985/01/14 New Engine Time Requirement Guides (TRG) {0374}

1985/01/14 Remanufactured Electronic Controls (U.S. And Canada) {7400,7754}

1985/01/14 Outright Purchase Of Cores For Remanufactured Products (U.S. And Canada) {7754}

1985/01/14 Improved Valve Mechanism Cover Group Has A New Valve Cover And Seal {1107}

1985/01/14 Valve Lash Adjustment Not A Warranty Item {1102,1105}

1985/01/14 Correct Specifications For Cranskshaft Deflection {1202}

1985/01/14 Additional Components Needed When New Horn Assemblies Are Installed {7303}

1985/01/14 New Tools Available To Service Fuel Injection Nozzles And Adapters {0706,1254}