1996/06/12 Caterpillar

New Oil Pump Used As Service Replacement{3310}

Usage:

3192 And 7251 (74E1127-1480) Marine Transmissions

Description of Change:

This article replaces the article with the same title on Page 4 of the December 1992 issue.

A new oil pump and associated components are available as a service replacement for the former oil pumps. The former oil pumps are no longer available.

Adaptable To: The former 4L-7221 or 8L-8541 Oil Pumps, used on the above marine transmissions, are no longer available. In those applications, the components identified in Chart A and Illustration 1 can be used as a service replacement for the former oil pumps. Illustration 2 shows the locations of the 6I-3597 Tube and 6I-3738 Hose Assembly for "Standard Rotation." Illustration 3 shows the locations of the 6I-3737 Tube Assembly and 6I-3738 Hose Assembly for "Opposite Rotation." Chart B lists the components that are removed and not reused when replacing the former 4L-7221 or 8L-8541 Oil Pumps.

Illustration 1. Location of components required for service replacement of former 4L-7221 or 8L-8541 Oil Pumps.

Illustration 2. Location of components for Standard Rotation.

Illustration 3. Location of components for Opposite Rotation.

Caterpillar Information System:

1996/06/12 Field Installation Procedure For Stator Thermocouples and RTDs{7498,4453}

1996/06/12 Preventive Measure For Protection Of Air Prelube Pumps{1319}

1996/06/12 New Hose Assembly And Clip Replaces Former Tube Assembly{1318}

1996/06/12 New Components In Accessory Drive Group And Alternator Drive Group Provide Improved Serviceability And Help Prevent Oil Leaks{1207,1425}

1996/06/12 Improvements To Check Valve Within Prechamber Group Reduce Maintenance Schedule{1106}

1996/06/12 Turbocharger Nozzle Cleaning{1052}

1996/06/12 Start-Up Procedure After Rebuild{1000}

1996/06/12 New Part Kits Available For SR4B Generators{4469}

1996/06/12 Selection Of Service Harness For Engines With Electronic Ignition System{1408}

1996/06/12 Higher Capacity Oil Pump Used{1304}

1996/06/12 New Personality Modules For 3412 Generator Set Engines{1902}

1996/06/12 Incorrect Full Torque Setting Values Displayed On Engine Information Tags{1901}

1996/07/22 New Bench Checking And Setting Procedure For Fuel Ratio Control (FRC) Mechanical Goverened Engines{1264,1265}

1996/07/22 New Service Tool Calibration Pins For Mechanical Goverened Engines{1264,1265}

1996/07/22 Governor Shimming Is Determined By The Governor Test Bench Calibration{1264,1289}

1996/07/22 Replacing The Shutoff Assembly In Engines With Older Governors{1264,1289}

1996/07/22 Servo Assembly Parts Have Been Changed To Make Some Parts Common Between Mechanical Governed (Type I-VI) Engines{1264,1289}

1996/07/22 New Electroless Nickel-Plated Oil Pan Provides Corrosion Protection{1302}

1996/07/22 New Strap Used In Alternator Mounting Group{1357}

1996/07/22 Procedure To Clean Area Around Injector Case And Sleeve Bore During Unit Injector Replacement{1713}

1996/07/22 New Electron Beam (EB) Welded Pistons Have Been Introduced For G3500 Engines Operating At Or Above 1500 rpm{1213,1214,1225,1226,1227}

1996/07/22 New Oil Jet Tube Assemblies Replace Oil Cooling Jet Assemblies{1331}

1996/07/22 New Water Lines Group Will Help Prevent Exhaust Manifold Cracks{1380}

1996/07/22 New Variable Timing Control Box Assemblies Are Used In Detonation Sensitive Timing Ignition Groups To Provide Improved Detonation Protection{1559,1560}