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When the tractor is not coupled to a trailer, what should be done with its air lines and gladhands?
- A.Let them hang loose and drag behind the tractor
- B.Leave the gladhands open to the air to dry out
- C.Coil them on the exhaust stack to keep them warm
- D.Connect them to the dummy couplers (dead-end couplers) or to each other as designed, so dirt and water stay out and the lines are secured
Correct answer
D. Connect them to the dummy couplers (dead-end couplers) or to each other as designed, so dirt and water stay out and the lines are secured
Why
Open gladhands collect road grit and moisture that later enter the brake valves, and loose lines chafe or snag. Stowing them on their dummy couplers protects the whole air system.
Manual topic: Combination Vehicles - Air Lines and Gladhands · From the Combination Vehicles practice bank (CV-241).