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What should you check about glad hand seals and air lines after coupling a trailer?
- A.Lines should hang low enough to touch the deck plate
- B.Seals can be missing if the couplings feel tight
- C.Seals should be in good condition, lines connected to the correct couplings without leaks, and hoses supported so they will not chafe, drag, or pull apart in turns
- D.Extra slack in lines never causes a problem
Correct answer
C. Seals should be in good condition, lines connected to the correct couplings without leaks, and hoses supported so they will not chafe, drag, or pull apart in turns
Why
A coupling that leaks or a hose that rubs through can disable trailer braking or dump supply air mid-trip. Correct routing leaves enough slack for turns without letting the lines contact moving or hot parts.
Manual topic: Air Brakes - Trailer Air Brakes · From the Air Brakes practice bank (AB-245).