1990/05/21 Caterpillar

Some Fuel Injectors May Be Used In Mixed Sets {1290}

Usage:

3500 Family Of Engines

Reference: Service Magazine; August 28, 1989; Page 8; "New Fuel Injectors Available For Parts Service" for 3500 Family Of Engines.

Reference: Service Magazine; October 2, 1989; Page 10; "Fuel Injector Reference For 3500 Family Of Engines" for 3500 Family Of Engines; D11N, 776B Tractors; 777B, 785, 789 Trucks.

Reference: Service Magazine; Special Edition; November 1, 1989; Page 60; "Fuel Injector Reference For 3500 Family Of Engines" for 3500 Family Of Engines; D11N, 776B Tractors; 777B, 785, 789 Trucks.

The "NOTE" on Page 12 of the October 2, 1989, and on Page 62 of the November 1, 1989 Service Magazine states: "Injectors which have either different tip orifice diameters or a different plunger design will have different fuel delivery characteristics. Injectors that vary in these characteristics CAN NOT be used as a mixed set in an engine."

This note has some exceptions to it as detailed in the August 28, 1989 Service Magazine. Refer to the chart in that article to see which injectors are interchangeable in mixed sets. Also, the current injector for all 3500 Vehicular Engines which had used the 9Y1785 Injector, is the 7E3382 Injector. To determine the applicable injector for earlier 3500 Vehicular Engines, check the charts in the October 2, 1989 Service Magazine.

Caterpillar Information System:

1990/05/21 New Valve Assembly And Spacer Used In Fuel Transfer Pump Group {1256}

1990/05/21 Governor Springs For Sleeve Metering Fuel Systems {1264}

1990/05/21 New Valve Shield Used To Control Oil Slobber {1105}

1990/05/21 Some 4C4462 Sleeve Removal And Installation Groups For Unit Injectors May Contain 4C5562 Reamer Assemblies That Are Dimensionally Incorrect {0782,1290}

1990/05/21 Check New 1W7578 And Remanufactured OR2530 Crankshafts For Burr On Thrust Face {1202,1203}

1990/05/14 Parts Service Information For Pistons{1214,1225,1331}

1990/05/14 1U9800 Ultrasonic Wear Indicator Group For Measuring Undercarriage Wear On Track-Type Machines And Thickness Of Other Components{0787,4150}

1990/05/07 New Fuel Injector Group Used On Heavy Fuel Engines {1290}

1990/05/07 Fuel Return Line Added To Fuel System In Power Modules {1274}

1990/05/07 Customer Interface Control Module Available {4490,7400}

1990/04/30 Reconditioning Of Bridge Wear Seat Is Permitted; Will Prevent Bridge Replacement When Not Necessary{1121}

1990/04/30 Data Link Adapter For 3176 And 3406B PEEC (Programmable Electronic Engine Controls) Used In Navistar Trucks{1900}

1990/05/28 Testing The Starter On The Engine {1453,1450,1401}

1990/05/28 New Fuel System Components For 3176 Truck Engines {1251,1290}

1990/05/28 New Operation And Maintenance Manual For 3306B Truck Engines {0374,0375,1000}

1990/05/28 Improved Manufacturing Process Extends Service Life Of New Exhaust Valves {1105}

1990/05/28 New, Longer Bolt Gives Better Retention To Fuel Injection Lines {1252}

1990/05/28 New Bolt Improves Serviceability Of Auxiliary (Sea Water) Pump Group {1371}

1990/05/28 Oil Guidelines For 3600 Family Of Engines {1318}

1990/06/04 Improved Seals Used; Seal Replacement In Folded Core Radiators{1353}

1990/06/04 New Bolt And Spacer Used In Exhaust Manifold Group To Improve Gasket Retention{1059}

1990/06/04 New Fuel Transfer Pump Group Has New Check Valve Location{1256}

1990/06/04 New Lifter Assembly Reduces Pitting And Spalling Of Camshaft Lobes{1209}

1990/06/11 What's Your Answer? {0113,0114,5050}