1984/07/02 Caterpillar

New Crankshaft, Cylinder Block And Camshaft Used{1202,1201,1210}

Usage:

D8L SA And 768C Tractors, 769C Trucks, 3408 ( 78Z ) Generator Set Engines

Description of Change: A new crankshaft, cylinder block and camshaft are used in the above engines. The new crankshaft is a new design that has thicker webs between the outer main journals and the outer rod journals. The thicker webs help increase the service life of driven equipment, such as hydraulic pumps.

Because of the change to the crankshaft, there is also a change to the cylinder block and camshaft.

Adaptable To: The new 1W5009 Crankshaft, 1W5084 Cylinder Block Assembly and 2W7980 Camshaft, when used together, are direct replacements for the former parts.

The new parts are in effect as shown in the chart.

Illustration 1. Former crankshaft design.

Illustration 2. New crankshaft design.

Caterpillar Information System:

1984/07/02 Modification To FT1488 Exciter Tester Group Allows Testing Of All Small Frame SR4 Generators{0785,4450,4467}

1984/07/02 Procedure To Clean Oil Passages In Crankshafts And Cylinder Blocks{0622,0675,1201,1202}

1984/06/25 New Rear Crankshaft Seal Group Used {1161}

1984/06/25 Improved Discs Used In No. 5 Rotating Clutch Of Transmission {3155,3150}

1984/06/25 New Cylinder Head Has Larger Mounting Holes For The Lifting Brackets {1100,1101}

1984/06/25 Oil Recommendations For Power Shift Transmissions {3179}

1984/06/25 New Transmission Center Shaft Improves Lubrication And Cooling To Sleeve Bearing {3150}

1984/06/25 New Vibration Damper Assembly Has Better Heat Resistance {1205}

1984/06/25 New Wheel Bearing Adjustment Procedure {4208}

1984/06/25 New Ammeter And Ammeter Calibrator Group Available {0651}

1984/06/25 Pins And Balls Can Be Used To Hold Shafts In Position In Transmission Directional Planet Carriers {3150}

1984/06/25 Copper Seals Available For JIC (Joint Industry Conference) Fittings {0600,0683,0684}

1984/07/02 Procedure Changed To Test Engines Out Of Chassis{1202,1205}

1984/07/02 New Seals Help Prevent Leakage In Axial Piston (Slipper) Pumps And Motors{3201,3203,4351,5058,5070}

1984/07/02 Surface Grinding Of Compacted Graphite Iron Cylinder Heads{1101}

1984/07/02 Testing For Leaks In Oil Coolers With Removable Cores{1365,1366}

1984/07/09 New Disassembly And Assembly Tools Available For Fuel Ratio Controls{0600,1278}

1984/07/09 Modifications Can Be Made To Improve Distribution Of Exhaust Through The Truck Dump Body Ribs{7258,1059,1061,1062}

1984/07/16 New Relief Valve Guide Used In Oil Pump{1315}

1984/07/16 Alternator Available For General Use{1405}

1984/07/16 Use Caution When Handling Components That Contain Asbestos{0353}

1984/07/16 Toric Ring Seals Available For Duo-Cone Seals In Service And Parking Brake Group{4208,4250}

1984/07/16 New Mechanical Service Meter Used{7478}

1984/07/16 FT1886 Valve Spring Compressor Group Available{0600,1108}