1990/05/21 Caterpillar

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

Usage:

D10 ( 76X, 84W ),
776 ( 14H ) Tractors;
777 ( 84A ) Trucks;
992 ( 25K ) Loaders;
D348 Industrial And Marine Engines

A burr has been discovered on the inboard thrust face of the No. 7 main bearing of some new and remanufactured crankshafts. See the illustration. The burr can be felt as a sharp edge at the outer diameter of the thrust face on the counterweight. This burr is caused by a factory shot-peening process. The burr does not cause structural damage. But it makes installation of the rear main thrust bearing difficult because the burr can scratch the bearing's thrust surfaces.

Location of possible burr on No. 7 (rear) main bearing thrust surfaces.

The burr should be removed before the crankshaft is installed in the engine. Use a file or small hand grinder to CAREFULLY remove the sharp edge. Avoid damaging the thrust face or main bearing journal surface when filing or grinding. Thoroughly clean the crankshaft before installation.

Caterpillar Information System:

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}

1990/04/23 Oil Level Gauge (Dipstick) Marks For 3116 Marine Engines{1326}

1990/04/23 New Crankcase Side Cover Use With Centrifugal Oil Filter Group{1328}

1990/04/23 New Rocker Arm Assemblies Have New Inserts And Buttons{1123}

1990/04/23 Part Numbers For Polyvee Belts From Original Equipment Manufacturers (OEM's){1357}

1990/04/09 What's Your Answer?{0315,0114,0785,1400}

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 New Valve Shield Used To Control Oil Slobber {1105}

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

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

1990/05/21 Some Fuel Injectors May Be Used In Mixed Sets {1290}

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}