1991/04/15 Caterpillar

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

Usage:

3300 Family Of Engines Except Spark-Ignited Engines

Reference: This article supercedes the article with the same title in the March 25, 1991 Service Magazine.

Description of Change: A new shaft bracket and oil supply plug are used in the rocker valve shaft assembly. The new plug blocks an oil supply hole in the bracket. The plug must be used with the new bracket in all the above engine applications except for on-highway truck engines equipped with a Jake Brake®.

Adaptable To: The new 7C7011 Shaft Bracket (2) and 3K8460 Plug (1) replace the former 7N8015 Shaft Bracket (not canceled). If a new 7C7011 Shaft Bracket is used for parts service in an application other than with a Jake Brake, the 3K8560 Plug must be installed.

To install the plug, apply 5P3413 Pipe Sealant to the threads and tighten the plug to a torque of 20 ± 5 N·m (15 ± 5 lb ft). See the illustration for the location of the new parts.

(1) Plug. (2) Shaft Bracket.

Caterpillar Information System:

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 Specification For Transmission And Drive Train Oil (TDTO){0645,3004,3150,3179}

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

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

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

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

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

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

1991/04/01 Remanufactured Type 1 Fuel Injector Assembly Available For 3500 Family Of Engines Equipped With UG8 Governors {1254,1264}

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}

1991/04/15 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}

1991/04/22 6L7896 Starting Motor (24V DC) Is No Longer Available From Caterpillar{1453}

1991/04/22 New Diagnostic Code 28 "Check Throttle Sensor Adjustment" Is On 1991 Engines{1900}

1991/04/22 Special Instruction, SEHS9340, Gives Jacket Water Heater Installation Procedures{1383}

1991/04/22 Improved Turbocharger Water Lines Group Eliminates Tube Cracking And Coolant Loss{1380,1052}

1991/04/22 Corrections For Systems Operation, Troubleshooting, And Specifications For 2301 Electric Governors For Generator Set And Industrial Engines, SENR2928-01{1289}

1991/04/29 Remove And Clean Flame Arrestors At Each Top End Overhaul{1058,1087}

1991/04/29 How To Obtain Military Manuals On Caterpillar Equipment{0374,0375}

1991/04/29 Inlet Air Temperature Sensor Added And Fuel Pressure Sensor Removed From Engine Control System{1900}

1991/05/06 Summary Of Bucket Ground Engaging Tools That Are Available For Parts Service{6800}