PIN 4501211 - Caterpillar

Illustration 1.Governor Actuator(1) Actuator Solenoid.(2) Wiring harness in question.(3) Deutsch connector.(A) Location of suspected broken wires.Use a Multimeter to measure the internal resistance of the governor position sensor. The resistance values should be about 35 Ohm between the BK and the RD wire, about 35 Ohm between the BK and the BR wire, and about 70 Ohm between the RD wire and the BR wire.If you find an open circuit in one or more of these connections, this is the source of the problem. If no open is discovered at first, move or shake the wires and check if this is not an intermittent problem. There may be a bad contact.When the problem is confirmed, Caterpillar recommends that you install a new 112-7593 Governor Actuator and calibrate it. If a new governor actuator is not available, it is still possible to repair the connections for the position feedback sensor. Follow this procedure:1. Release the hydraulic pressure.2. Disconnect the hoses from the governor actuator. 3. Remove the governor from the bracket.4. Open the front of the cylinder to remove the spring.5. Open the back plug at the feedback port to gain access to the Allen bolt of the sensor and unscrew the bolt. 6. Test all three wires for continuity between the sensor connection and the Deutsch connector until you find the interrupted wire that needs to be repaired.7. After installing the governor actuator, carefully mount the wiring with the use of straps as shown in Illustration 2. Illustration 2.
Illustration 2.(B) Mount wires from actuator solenoid and rest of harness to actuator. (C) Strap all wires in one bundle. COPYRIGHT 1999 CATERPILLAR ALL RIGHTS RESERVED