ADAPTER-DRIVER 8F4678 - Caterpillar

Illustration 1 g02419938
Schematic of the "Oscillating Axle Function" circuit connections.The Machine ECM will control the "Oscillating Axle" function based on the operator input from the "Oscillating Axle" button that is located on the "Soft Switch Panel (SSP)". The status of the button is communicated to the ECM on the CAN B Data Link.When the axle is LOCKED, the ECM will send a command to the SSP to illuminate the LED indicator above the "Oscillating Axle" button.When a request to UNLOCK the axle brake is received by the ECM, the Oscillating Axle Solenoid is energized. This condition will result in the oscillating axle brake cylinders being retracted allowing the axle to oscillate. When the solenoid is not energized, the oscillating axle brake cylinders will extend in order to LOCK the axle.During machine operation, if the oscillating axle LOCK is unlocked and the left armrest is RAISED, the ECM will de-energize the solenoid locking the axle. When the left armrest is returned to the DOWN position, the ECM energizes the solenoid unlocking the oscillating axle brake. If the axle is UNLOCKED and the service brakes are LOCKED during machine operation, the ECM will de-energize the solenoid locking the axle. If the operator presses the SSP button to LOCK the axle when the service brakes are LOCKED, the ECM will keep the axle LOCKED when the service brakes are released.If the signal from the "SSP Oscillating Axle" button is unknown, the axle will be LOCKED. If there is a diagnostic code for the "Armrest Position" switch or the "Service Brake Pedal Limit" switch, the axle will be LOCKED.