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