953C, 963C and 973C Track-Type Loaders Transmission Electronic Control System Caterpillar

Before the ECM is replaced, ensure that replacement is absolutely necessary. The ECM is seldom the cause of a fault. Always check that power is available to the ECM. Battery voltage is required between contacts D-1 and D-2 of the machine harness connector for the ECM. Continue ONLY if all other attempts to isolate the problem have failed.

1. Turn the disconnect switch and the key start switch to the OFF position. Disconnect the machine harness from the ECM.

2. Remove the ECM.

3. Make sure that the replacement ECM is the correct part number.

4. Connect the machine harness to the ECM.

5. Install the replacement ECM.

6. Cycle power to the ECM twice before using the ECM. This establishes ECM memory in the Caterpillar Monitoring System machine code and options code.

7. Perform system calibrations.

• Right and left pedal calibration

• Center pedal calibration

• Speed/Direction Lever calibration

• Minimum track speed calibration

• Track speed synchronization calibration

• Maximum track speed calibration

Note: Performance will be affected if ANY of the calibration procedures are omitted. Perform all of the calibration procedures.