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What should you do if the fifth wheel release handle is very hard to pull during uncoupling?
- A.Check that pressure is off the jaws by gently backing against the kingpin, rather than forcing the handle
- B.Stand in front of the drive tires and pull with both hands and your body weight
- C.Use a long pipe for leverage and force it
- D.Drive forward and back quickly to shake it loose
Correct answer
A. Check that pressure is off the jaws by gently backing against the kingpin, rather than forcing the handle
Why
A jammed handle usually means the kingpin is loaded hard against the jaws. Relieving that pressure the correct way frees the handle without breaking the mechanism or injuring you.
Manual topic: Combination Vehicles - Uncoupling · From the Combination Vehicles practice bank (CV-048).