1992/02/17 Caterpillar

New 100 Amp Alternators Available For Applications With Large Electrical Requirements{1405}

Usage:

All Caterpillar Machines

Description of Change: A new 100 amp alternator is available for applications where user installed accessories exceed the rating of the original equipment alternator.

Adaptable To: The new 9X7803 Alternator is rated at 100 amps at 27.5 volts and is a direct physical replacement for the alternators listed in the chart. To utilize the increased current output of the alternator, the high current user added items must be wired as shown by the dashed lines in the diagram.

(1) 9X7803 Alternator. (2) Breaker. (3) Connecting wire.

Using the proper gauge wire, connect high current accessories directly to the alternator through a circuit breaker placed as close to the alternator output stud as possible. See chart for proper breaker and wire sizes.

The output stud on the 9X7803 Alternator is 1/4 inch diameter and will not directly fit the 7/16 inch diameter ring terminal used on some existing machine harnesses. The harness can be adapted to the new alternator stud with a 7T9930 Adapter Nut or by replacing the machine harness terminal ring with a 1/4 in diameter terminal ring. The new terminal ring must be soldered to the harness.

The 9X7803 Alternator must be equipped with a pulley that will rotate the alternator at about 2300 rpm with the engine at low idle, to achieve acceptable low idle performance. When replacing the pulley, larger belts may be required and/or a second belt added.

Caterpillar Information System:

1992/02/10 Light Green Gasket Material On Secondary Air Filter Elements May Stick To Filter Housing{1054,1051}

1992/02/10 The Letter "I" Now Used In Part Numbers{0374}

1992/02/03 Many Commercial Folded Core Radiators Can Be Converted To Multiple Row Module Radiators{1353}

1992/02/03 New Oil Filler Tube Assembly Helps Prevent Cracking{1316}

1992/02/03 Oil Capacity Increased{1302,1326}

1992/02/03 New Cast Iron Valve Rocker Arm Groups Provide Improved Bearing Retention{1123}

1992/02/03 5P7437 Adapter (Part Of 8T5301 Diesel Timing Adapter Group) Must Be Modified To Work On Current Fuel Lines.{0782}

1992/02/03 Master Bolts Have Been Removed from the Parts Consist List for Link Assemblies{4171}

1992/02/03 Improved Exhaust Manifold Group Eliminate Stud Breakage And Exhaust Leakage{1059}

1992/01/20 The Letter "I" Now Used In Part Numbers{0374}

1992/01/20 Engine Wiring Schematic Wall Charts Available{0374}

1992/01/20 New Painting Procedure For SR4 Generators{4450}

1992/02/17 New Cylinder Head Gasket Used{1124,1100,1101}

1992/02/17 New Fuel Line Assemblies And Adapter Assembly Used{1252}

1992/02/24 1P8116 O-Ring Seal Available To Service Unit Injectors{1290}

1992/02/24 Be Sure To Use Correct Connector/Connectors Between Fuel Transfer Pump Outlet And Tube To Fuel Filter{1274,1256}

1992/03/02 Procedure To Repair Oil Leak At Rear Camshaft Cover{1221}

1992/03/02 New Combustion Seal (O-Ring Seal) Used In Unit Injection Pump Group{1290}

1992/03/02 Fuse Blocks Have Been Improved And Are Now Serviced{4450}

1992/03/09 New Hose In Turbocharger Oil Lines Group Resists Deterioration Caused By Heat {1307}

1992/03/23 Unit Injector Test Specifications Have Been Updated {0374,1290}

1992/03/23 Troubleshooting Electrical Noise Problems {1900}

1992/03/23 New Electronic Control Groups (Rack Position Sensor And Timing Position Sensor) Provide Increased Reliability {1905,1911}

1992/03/23 Turbocharger Bearings Available For Garrett (Formerly AiResearch) Turbochargers Changed {1053}