Table 3-6. Unit Troubleshooting Table. -- Continued
Test or Inspection
HUB HOT OR BRAKES LOCKED AND WILL NOT DISENGAGE. -- CONTINUED
Ensure that brake pedal (3) is not sticking in depressed position.
If foot brake pedal (3) is sticking, replace foot treadle valve (4) (Para 8-9).
Check air lines for leakage or damage. Use a soap solution (Item 56, Appendix C) to check for leakage at
connections (watch for bubbles).
Replace all damaged lines (Para 15-8) and tighten any loose connections.
Using a soap solution (Item 56, Appendix C), check the air line between front and rear axle quick release
valves for damage or leaks.
Replace damaged air lines (Para 15-8) and tighten loose connections.
Check air system for proper operation.
If faulty treadle valve (4) is found, replace foot treadle valve (Para 8-9).
Check S-cam (5) for sticking and/or proper operation.