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Why should automatic slack adjusters not be manually readjusted again and again in normal service?
- A.Automatic adjusters never need any inspection
- B.Manual adjustment makes automatic adjusters pump more air
- C.Repeated manual adjustment can hide a mechanical problem, and an automatic adjuster that keeps going out of adjustment needs diagnosis and repair
- D.Automatic adjusters are adjusted only by changing tire pressure
Correct answer
C. Repeated manual adjustment can hide a mechanical problem, and an automatic adjuster that keeps going out of adjustment needs diagnosis and repair
Why
An automatic adjuster is designed to maintain stroke as linings wear, so a brake that will not stay adjusted has worn hardware, a faulty adjuster, or another defect. Turning it back by hand treats the symptom while the cause keeps damaging the brake.
Manual topic: Air Brakes - Slack Adjusters · From the Air Brakes practice bank (AB-162).