1986/05/05 Caterpillar


Be Sure The Polarity Of The Electrical Connector On EG3P Woodward Actuator Assembly Is Correct{1265,1250}

Usage:


D379, D398, D399, G379, G398, G399 Engines And 3400 Series Engines With EG3P Woodward Actuator Assemblies

Reports indicate that in some cases the polarity of the connector on the EG3P actuator may be reversed. See Illustration 1. If the wiring from the 2301 Governor has also been reversed, there will be no problem in running the engine. But if a new actuator with the correct polarity is installed, the engine will not start. This problem may occur with the following actuator part numbers:

7W1454, 7W1455, 7W6122, 7W6652 and 7W6653

When an EG3P Actuator Assembly is replaced and it will not function, reverse the polarity of the wires to the actuator. The most convenient location to reverse the polarity is at the terminal strip in the engine mounted junction box. See Illustration 2. Reverse the wires connected to terminals 33 and 34 in the junction box. This will insure that the polarity of the diode (if used) is not reversed.


Illustration 1. Woodward EG3P Actuator Assembly.


Illustration 2. Location of terminal strip in the engine mounted junction box.

Special Instruction Form SEHS8629 has additional information about this subject.

Caterpillar Information System:

1986/05/05 New Publication Lists Service Manual Modules for Caterpillar Earthmoving And Engine Service Manuals{0374,0375}
1986/04/21 Use Care When Removing Oil Pan And 9N3167 Plate{1302}
1986/04/21 New Conversion Groups Available To Convert From Hydramechanical Governors To Woodward PSG Governors{1289}
1986/04/21 New Wire Assemblies And Spark Plug Insulators Improve Service Life Of Ignition System{1558,1555,1552,1408}
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1986/04/21 Correct Position Of The Bleed Hole In The Fuel Line Adapter{1252}
1986/04/21 Three Element Speed Switch Replaces Dual Element Speed Switch{7418,7411,7410,7421}
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1986/04/21 Silicone Rubber Hoses Available For Engine Oil Cooler Water Lines{1378,1380}
1986/04/21 New Alternators Are Self-Energizing And Have Built-In Regulators{1405}
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1986/04/07 New Index Lists Engine Special Instructions By SMCS Code{1000,0374}
1986/05/05 Portable Hydraulic Pump Group Available{0600}
1986/05/05 FT Tooling Prints Available For Bushing Installation In Governor Housing{0600,1287}
1986/05/05 Service Reminders For 3400 Family Of Diesel Engines{1204,1214,1331}
1986/05/05 Special Editions of Service Magazine And How To Find Them{0374}
1986/05/12 Top Shaft Wear Sleeve For 7241 Marine Transmissions Can Be Used On 7231 Marine Transmissions{3306}
1986/05/12 Cylinder Liner Seat Insert Available{1217,1200}
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1986/05/12 Identification Of Crankshafts For Marine Society Approval{1202}
1986/05/12 Bolt And Washer Added To Engine Air Lines Group To Help Retain Pipes{1058,1060,1050}
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1986/05/12 New 8T5334 Surface Temperature Thermocouple Probe Available{0776,0600}
1986/05/19 How To Use SIRS (Service Information Retrieval System) On Microfiche{0374}
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