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What is the job of the slack adjuster in an S-cam air brake?
- A.It stores compressed air for long descents
- B.It dries moisture from the air supply
- C.It limits the maximum tank pressure
- D.It connects the pushrod to the S-cam and provides a way to adjust brake stroke
Correct answer
D. It connects the pushrod to the S-cam and provides a way to adjust brake stroke
Why
The slack adjuster is the lever between the pushrod and the brake camshaft, and its adjustment sets pushrod stroke. Automatic slack adjusters keep that stroke in range, but drivers must still check for excessive stroke during inspections.
Manual topic: Air Brakes - Air Brake System Components · From the Air Brakes practice bank (AB-007).