1994/10/01 Caterpillar

New Rear Crankshaft Seal Groups Available {1161}

Usage:

3114 And 3116 Commercial Engines

Description of Change: New rear crankshaft seal groups that include both the seal and wear sleeve have been released for parts service. The former seals will no longer be serviced. The former seals could not be used when it was necessary to install a wear sleeve on the crankshaft because of flange wear.

Adaptable To: The new 115-4109 Seal Group (dry) is a direct replacement for the former 7C-3570 Seal (dry). The new 115-4120 Seal Group (wet) is a direct replacement for the former 7E-7589 Seal (wet). The former 7C-7980 Wear Sleeve, which had been released for use when crankshaft flange wear was evident, has been canceled.

NOTE: The new 115-4109 and 115-4120 Seal Groups are similar to other combination seal and sleeve groups that require special handling and installation procedures. A Special Instruction is being released to address that subject. Service manuals will also be changed to reflect the installation of the new combination seal and wear sleeve groups. Tooling for installation of the new seal groups remains the same.

Caterpillar Information System:

1994/09/01 Different Emergency Stop Push Buttons for Electronic Modular Control Panel II (EMCP II) {4490,4450}

1994/09/01 Reworking Diesel And Gas Cylinder Heads On 6.25 Bore V Engines {1101}

1994/09/01 New Rear Camshaft Segments With Stronger Camshaft Flange Used {1210}

1994/09/01 Use Thread Lock On Bolts That Fasten Aftercooler Housing To Cylinder Block {1063}

1994/09/01 Turbocharger Turbine Nozzle Reusability Information {1052}

1994/09/01 New Operation And Maintenance Videos Available {0374}

1994/09/01 Improved Knock (Detonation) Sensor Group Replaces Detonation Sensor {1559}

1994/09/01 New Gasket Used In The Water Lines Group {1380}

1994/09/01 New Plunger In Fuel Pressure Regulating Valve {1250}

1994/09/01 New Cylinder Liner, Spacer Plate, Spacer Plate Gasket, And Cylinder Head Gasket Used {1216,1221,1124}

1994/09/01 New Gears And Pipe Plugs In Auxiliary Drive Group {1150,1165}

1994/09/01 New Gasket Provides Improved Sealing Between Air Compressor And Drive {1803}

1994/10/01 Fuel Priming Pump Can Be Installed On Either Left Or Right Side Service Fuel Filter Groups {1258}

1994/10/01 New Engine Crankshaft Rubber Damper Assembly Uses Improved Rubber Material {1205}

1994/10/01 Adjustment Of Air/Fuel Ratio Control Setting {1278}

1994/10/01 New Governor Control Assembly to Improve Acuator Stability {1289}

1994/10/01 New Spark Plug Tightening Specifications For Engines With Canadian Standards Association (CSA) Ignitions {1550}

1994/10/01 Longer Inch Cylinder Head Bolt Provides Increased Thread Engagement {1100}

1994/10/01 Remanufactured Crankshaft Interchangeability; Remanufactured "Upgrade To New" (UTN) Availability {1202}

1994/10/01 New Higher Capacity Oil Pump Used {1304}

1994/10/01 New Gas Pressure Regulator Assembly Used To Provide Increased Parts Commonality {5503}

1994/10/01 New 106-7408 Engine Oil Film (Decal) Available {7557}

1994/10/01 New Intake Valve Lash Setting {1105}

1994/10/01 New Prechamber Assembly Used In Prechamber Group; New Specifications For Prechamber Group {1106}