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 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 MG507 Marine Transmission Uses Metric Fasteners {3354}

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

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

1984/06/11 Valve Springs Must Be Removed Before Fuel Injection Nozzle Adapter Assembly Is Removed{1106}

1984/06/11 Oil Temperature Gauges Must Be Used With The Correct Senders{7488,7489}

1984/06/11 Higher Gloss Paint Used On Caterpillar Products{7559,0374}

1984/06/11 Changes Made To Air Shutoff And Rack Shutoff Groups{1078,7418}

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

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

1984/07/16 Make Sure Crankshaft Is Installed Correctly{1202}

1984/07/16 A New Baffle Plate And Oil Pump Drive Sleeve Are Used In Marine Transmissions{3310}

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 New Mechanical Service Meter Used{7478}

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

1984/07/16 Use Vacuum Tester For Quality Control Check Of Water Pump Seal{0768,1361}

1984/07/16 Installation Instructions For Turbocharger Bearing Kit{1052,1053}

1984/08/13 Higher Compression Pistons Can Help Reduce White Exhaust Smoke During Cold Weather Starts{1250}