1991/04/01 Caterpillar

Remanufactured Type 1 Fuel Injector Assembly Available For 3500 Family Of Engines Equipped With UG8 Governors {1254,1264}

Usage:

Reference: Service Magazine; October 2, 1989; Page 10; "Fuel Injector Reference for 3500 Family Of Engines" for 3500 Family Of Engines; D11N, 776B Tractors, 777B, 785, 789 Trucks.

Service Magazine; June 11, 1990; Page 10; "New 7C9580 Fuel Injector (Type 2) Available To Replace 2W5201 Fuel Injector (Type 1)" for 3500 Family Of Engines; D11N, 776B Tractors,; 777B, 785, 789 Trucks.

In the past, the Remanufactured 0R0906 Injector Assembly has been changed from a Type 1 [10.7 mm (.42 in)] injector to a Type 2 [11.0 mm (.43 in)] injector. This change was made because the new component parts used in the Type 1 injector were unavailable for remanufacturing purposes. In marine propulsion applications, the Type 2 injectors have shown a tendency to surge at low idle when the engine is equipped with a UG8 Governor. For those applications, the 0R3252 Fuel Injector Assembly is available. The 0R3252 Fuel Injector Assembly is a Type 1 injector which can be used as a direct replacement for the 2W5201, 7C9580, or 0R0906 Injector Assemblies.

Caterpillar Information System:

1991/04/01 Fuel Injection Pump Bushing Torque Increased {1253}

1991/04/01 New Performance Category For Engine Crankcase Oil {1318}

1991/04/01 Correct Position Of Lockwashers For Electrical Components With Screw Terminals {1400,7553}

1991/03/25 New Cylinder Blocks And Crankshafts Used{1201,1202,1231}

1991/03/25 New Shaft Bracket And Oil Supply Plug Used In Rocker Valve Shaft Assembly{1102,7553}

1991/03/18 New Air Compressor Crankshaft Has Improved Spline Lubrication{1803}

1991/03/11 4C6534 Harness Now Available To Set Engine Electronic Speed Switches{7427,0779,0785}

1991/03/11 1U5269 Mirror Tube Used With 1U5268 Borescope May Become Scratched{0777}

1991/03/11 New Rotocoil Used In Cylinder Head Group; New Valve Stem Oil Shield Used In Locomotive Engine Cylinder Head Group{1109,1100}

1991/03/11 New Recommendations For Lubrication, Maintenance, And Adjustment{3055,7520,7521,7527}

1991/03/04 Standard Duty Air Cleaners Used Instead Of Light Duty (Clamp-On Style) Air Cleaners For Direct Attachment Usage{1051}

1991/02/25 New OR3231 Remanufactured 3208 Truck Engine Available{1000,7754}

1991/04/01 Continuous Single Cylinder Misfire When Engine Is Under Load {1552}

1991/04/08 Two Different Air Inlet Heater Control Modules Available{1090,1087,1058}

1991/04/08 New Bolt Improves Retention Of Backplate To Housing Assembly In Turbocharger Cartridge Groups{1052,1053,1056,7553}

1991/04/08 New Carburetor Control Leakage Improves Idle Stability{1266}

1991/04/08 Remote Mounted Pressure Sensor Used In Temperature And Pressure Control Group In Electronic Modular Control Panel (ECMP){4490}

1991/04/15 Simplified Battery Test Procedure SEHS7633-02 And Battery Test Sheet SEHS9326 Available{1401}

1991/04/15 New Specification For Transmission And Drive Train Oil (TDTO){0645,3004,3150,3179}

1991/04/15 New Auxiliary Water Pump Used; New Chart Lists Auxiliary Water Pump Group Numbers, Pulley Sizes, And Drive Belts{1371,1357,1384}

1991/04/15 New Shaft Bracket And Oil Supply Plug Used In Rocker Valve Shaft Assembly{1102,7553}

1991/04/15 New Oil Filter Element Assembly Used In Oil Filter Groups{1318}

1991/04/22 Procedure For Applying 1U8846 Gasket Maker{0648,7555}

1991/04/22 Procedure To Set Voltage Droop On SR 4 Generators With VR3 Voltage Regulators Using Resistive Load Bank{4475,4467}