CDL Combination Vehicles TestDriving Combination Vehicles SafelyMedium
During a pre-trip inspection of a combination vehicle, a driver notices that the glad hands are corroded and show signs of air leakage. What is the immediate action the driver should take?
- AReplace the glad hand gaskets or the glad hands themselves before driving.
- BProceed with the trip, but monitor the air pressure gauges closely.
- CTighten the glad hand connections with a wrench to stop the leaks.
- DApply grease to the glad hands to seal the leaks temporarily.
Show answer & explanationAnswer & explanation
Correct answer: A. Replace the glad hand gaskets or the glad hands themselves before driving.
Corroded glad hands or leaking gaskets can lead to a loss of air pressure in the trailer's braking system, which is a critical safety hazard. They must be repaired or replaced before the vehicle is operated.
Why the other options are wrong
- B. Operating with air leaks in the braking system is extremely dangerous and illegal.
- C. Glad hands are not designed to be tightened with a wrench; attempting to do so can cause further damage or not resolve the leak.
- D. Grease is not a permanent seal and will not stop air leaks effectively; it's a temporary, unsafe fix.
Glad Hand Air Leaks
Air leaks from corroded glad hands or worn gaskets can compromise the trailer's air brake system and must be repaired immediately.
- Glad hands connect air lines between tractor and trailer.
- Leaks lead to loss of air pressure, affecting braking.
- Repair involves replacing gaskets or glad hands.
Memory trick: Glad hands leaking? Gasket's breaking! Fix it now, no faking!