1996/07/22 Caterpillar

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

Usage:

3114, 3116, 3126 Industrial, Marine and Generator Set Engines

Reference: "3114, 3116 And 3126 Engine Governors" (MUI) SENR6454; Page 48, 52.

There is a new governor FRC bench checking and setting procedure. See the Reference Article and the following steps:

* Rotate the governor throttle lever from against the HIGH Idle screw to the LOW Idle screw and back against the HIGH Idle screw.

NOTE: The above step should be done with a "snapping" or "quick" release motion. The governor test stand throttle spring will assist in making this a fast movement.

NOTE: All factory built governors are set using this method.

NOTE: The above procedure must be used or the governor FRC (on engine setting) may appear to be too HIGH (rich). If this method is not used to set the FRC on the 1U-7326 Governor Calibration Bench, the setting will be too LOW (lean) and the engine less responsive.

Caterpillar Information System:

1996/06/12 New Oil Pump Used As Service Replacement{3310}

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}

1996/07/22 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}

1996/07/22 New Stainless Steel Air Pressure Sensor And Gas Pressure Sensor Tube Assemblies In Engine Wiring Groups Provide Increased Strength And Corrosion Resistance{1058,1285,1904}