ASA-5® SLACK ADJUSTER TROUBLESHOOTING CHART (Continued)
SYMPTOMS |
| CAUSE | REMEDY | |
2. Brakes dragging— | A. | ASA‑5® slack adjuster | A. Correct the ASA‑5® slack adjuster installation. | |
apparent |
| improperly installed. Too |
| |
| close to actuator: brakes |
| ||
brakes. |
| can’t fully release. |
| |
|
|
|
| |
|
| B. Loose actuator push rod | B. Reposition components and torque to | |
|
|
| jam nut. | specification. |
|
|
|
|
|
|
| C. | Spring brakes not fully | C. Check spring brake release air pressure and |
|
|
| retracting. | repair or replace air valving as necessary. |
|
|
|
| Repair or replace spring brake. |
|
|
|
|
|
|
| D. | Broken foundation brake | D. Repair or replace as required per In Service |
|
|
| components, including | Inspection. |
|
|
| camshaft bushings. |
|
|
|
|
|
|
|
| E. | Vehicle brake torque | E. Check other brakes to ensure they are working. |
|
|
| imbalance. (More work | Check air pressure balance and threshold pres‑ |
|
|
| done by some brakes | sure (refer to Bendix publication BW‑1555). Check |
|
|
| than others, thermal | driver braking habits, e.g. use of trailer control |
|
|
| expansion of drums). | valve. Use same friction material on all axles. |
|
|
|
|
|
|
| F. | Brake drum | F. Replace or repair as required. |
|
|
| out‑of‑round, excessive |
|
|
|
| thermal expansion. |
|
|
|
|
|
|
|
| G. | Air system malfunction, | G. Inspect and correct. |
|
|
| not exhausting |
|
|
|
| completely. |
|
|
|
|
|
|
|
| H. | New lining swells during | H. Back‑off adjustment until brakes are free. |
|
|
| break‑in. |
|
|
|
|
|
|
|
|
|
|
|
10