Front

1. Disconnect the air line at the air compressor drier that is connected to the front fill solenoid inlet.

NOTE: If oil is present in the air lines, replace both LF and RF air shocks. Do not replace air shocks if only water is found in the air lines.

2. Disconnect the air line at the RF shock.
3. Connect NGS tester to the Data Link Connector (DLC).
4. Turn the 4WAS FRNT-FILL (front fill solenoid) solenoid ON.
5. Connect shop air line to the disconnected air line and blow out any fluid.
6. Reconnect the air line at the RF air shock.
7. Disconnect the air line at the LF air shock.
8. Turn on the following 4WAS solenoid:
- FRNT_FILL (front fill solenoid) ON.
- GATEVALVE (front gate solenoid) ON.

9. Connect shop air line to disconnected air line and blow out any fluid.
10. Reconnect the air line at the LF air shock.
11. Replace air compressor drier.
12. Reconnect air line to air compressor drier.