1994/09/01 Caterpillar

New Gasket Provides Improved Sealing Between Air Compressor And Drive{1803}

Usage:

3406B/C (7FB, 8TC, 4MG, 5YG, 3ZJ, 5KJ, 2EK, 4CK) Truck Engines

Description of Change: A new gasket is used in the air compressor groups on the above truck engines. The new gasket material has less rubber content. This helps prevent the new gasket from hardening and becoming brittle. The new gasket will provide better sealing and increased service life.

Adaptable To: The 100-6178 Gasket is a direct replacement for the former 7W-6084 Gasket in the air compressor groups on the above truck engines.

NOTE: When installing a new 100-6178 Gasket:

* The "beaded" side of the new gasket must be toward the front timing housing.

* The new gasket must NOT be coated with anti stick compound.

Location of new 100-6178 Gasket in typical air compressor group.

Caterpillar Information System:

1994/09/01 Impeller Appearance On Remanufactured 3406 Water Pump{1364,1361}

1994/09/01 New Seals In Pump Fastener Group And Fuel Injection Pump Group Have Improved Heat Set Resistance{1251}

1994/09/01 Additional Parts Now Provided With 0R-4180 Remanufactured Cylinder Head Assembly{1100}

1994/09/01 Turbocharger Popping Noise Does Not Cause Damage{1052}

1994/09/01 Remanufactured 3400 Cylinder Heads Now Use Intake And Exhaust Valves With Chrome Plated Valve Stems{1105}

1994/09/01 Improved Fuel Pump Bonnet Seal Has Better Heat Resistance{1251}

1994/09/01 New Fuel Priming Pump Assembly Used In Fuel Priming Pump Group{1258}

1994/09/01 New Fuel Priming Pump And Gasket Used{1258}

1994/09/01 Caterpillar Introduces New Long Life Heavy Duty Engine Coolant{1395}

1994/08/30 Use Only Clean Engine Oil To Lubricate Unit Injector O-Rings{1290}

1994/08/30 Changing Complete Sets Of Fuel Injection Pump Groups May Not Fix Low Power Problems{1251}

1994/08/30 New Water Seals Used in 3400 Head Assemblies{1124}

1994/09/01 117-7213 Control Group (Vehicle Speed Filter) Available For Field Installation{1914}

1994/09/01 Caterpillar Legendary Service Literature Catalog SELD0811 Updated{0374}

1994/10/01 Catalytic Converter/Muffler Identification{1062,1091}

1994/10/01 New Rear Crankshaft Seal Groups Available{1161}

1994/10/01 Corrections To 3176B/3406E Electronic Troubleshooting Guide{0374,1901}

1994/10/01 Check 9U-7242 Valve Spring Compressor Plate For Correct Thickness{0703}

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

1994/11/01 Verification of Connecting Rod Eye Bushing Retention When Overhauling Engines{1218}

1994/11/01 Fuel Injection Nozzle Reference {1254}

1994/11/01 Fuel System Pressure{1256}

1994/11/01 Unit Injector Removal And Installation{1290}

1994/11/01 Engine Oil Capacity Change{1326,7542}