1994/08/30 Caterpillar

Service Procedure For 40 Pin Connector Seal{1901}

Usage:

3176B (9CK),
3406E (5EK) Truck Engines

The 110-6844 "Step" Seal is the ONLY seal available for parts service of the 40 pin connectors P1 (P/N 110-6845) and P2 (P/N 110-6846). See Illustration 1. If a new wiring harness or P1/P2 40 pin connector is installed, always verify that the 110-6844 "Step" Seal is used.

When installing a 110-6844 Seal, apply a light coat (approximately a 3.2 mm (0.125 in) diameter dot) of 1P-0808 All Purpose Lubricant (white lithium grease) on the seal prior to assembly. A 1U-9053 Grease Capsule is available and contains the proper type and amount of lithium grease.

The 3E-6285 "Non-Step" Seal was not factory installed for a period of time but is again being installed in the factory. See Illustration 2. Late versions of the 3E-0360 ECM and the current 108-0491 ECM have an internal (Non-Serviceable) 40 pin connector face seal on connectors J1 and J2 to allow factory use of the "Non-Step" seal. Refer to the following table for specific usage of the "Step" and "Non-Step" 40 pin connector seals.

Illustration 1. 110-6844 (40 pin connector "Step") Seal. Location of "Step" (A).

Illustration 2. 3E-6285 (40 pin connector "Non-Step") Seal.

Caterpillar Information System:

1994/08/30 Use Of 4C-4377 Stress Plate Group In 3116 Cylinder Block Reconditioning{0672,0673,1201}

1994/08/30 Changes To 3116 Truck Engine For 1994{0374}

1994/07/01 Fuel Injection Nozzle Spray Orifice Plugging{1254}

1994/07/01 Be Sure To Use The Correct Reverse Flow Check Valve{1251}

1994/06/24 Installation Procedure For 1R-0716 Engine Oil Filter{1318}

1994/06/24 Procedure For Lapping Sealing Surfaces Of Fuel Injection Pump Barrels And Bonnets{1251}

1994/06/24 New Valve Lifter Assembly Provide Improved Lubrication Of Lifter Roller And Camshaft Lobes{1209,1210}

1994/06/24 New Rocker Arm Adjustment Screw Used To Adjust Valve Clearance{1123,1100}

1994/06/24 New Intake And Exhaust Valves Used{1105,1100}

1994/05/31 New Oil Cooler And Filter Base Assembly And New Oil Cooler And Filter Base Group Have Stronger Mounting Flanges {1378,1306}

1994/05/31 Date Code On 7000 Series Fuel Injection Nozzles; New Seals Used In 7000 Series Fuel Injection Nozzles {1254}

1994/04/22 Service Tools For Electronic Controls{0781,0782}

1994/08/30 December 1993 FLASH File Update And Fan Control Logic{1902}

1994/08/30 New 310A Jake Brake® Available{1119}

1994/08/30 New Oil Pressure Regulating Valve Used In Oil Filter Group{1315}

1994/08/30 False Logging Of Diagnostic Codes 100-01 (FC46) "Low Oil Pressure" And 100-11 (FC46) "Very Low Oil Pressure"{1902}

1994/08/30 Longer Studs And Spacers Used To Retain Exhaust Manifolds{1059}

1994/08/30 New Exhaust Manifolds, Longer Mounting Studs And Spacers Used In Exhaust Manifold Groups{1059}

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

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

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

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

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

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