PANEL GP-INSTRUMENT-LH 5E9204 - Caterpillar

Caterpillar: Confidential Yellow
PSP FOR POTENTIOMETER SENDING INCORRECT SIGNAL TO SHUT DOWN MACHINE - PS4317 - MAILED US AND CANADA, CACO, COFA, CFEL - SEE SERVICE LETTER EXTENSION SEBE4274, DATED 04/14/90
  The information supplied in this service letter may not be valid after the termination date of this program.   Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
U-43 A-30 AU-29 E-23 1408 PS4317 This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4317" as Part Number, "7755" as Group Number, and "96" as Description Code. Although this Program can be administered either before or after a failure, it is recommended that it be administered before to prevent unnecessary downtime and lost production. Termination Date
March 31, 1990
Problem
The warning system needs to be isolated from the electronic pump control circuit to prevent the potentiometer signal voltage from indicating incorrectly that the machine needs to be shutdown.
Affected Product
Model Identification Number E200B 6KF1-50, 56, 59-65, 73, 74 EL200B 7DF71-106, 108-117, 120-132, 134, 136-152, 164, 168-173, 175, 178, 181, 183, 185, 188, 190, 192, 199-201, 227, 253
Parts Needed
1 - 995562 Harness-Alarm
Action Required
1. Shut the machine down and make sure the key switch is in the "OFF" position. 2. Remove the covers from the controller box. 3. Disconnect the wire harness from the controller and install the 995562 Harness-Alarm between the controller and the existing wire harness. 4. Start the engine and check the diagnostic L.E.D.'s on the controller. Make sure that L4, L6, and L9 are on. This is the normal pattern. L8 will light up when the automatic engine control works. 5. Turn the back-up switch