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Module 3: Coupling and Uncoupling

Uncoupling Procedure

1. Prior to uncoupling, set the trailer parking brakes. Back the tractor gently against the trailer. This will release the load on the fifth wheel locking mechanism. If the truck has an air suspension, do not dump the air before opening the fifth wheel. Doing so may cause a hard to open situation.

2. Block the trailer wheels. If poor ground conditions exist you may have to provide a base for the trailer landing gear.

3. Lower landing gear until it contacts the ground. Give extra turns to reduce load on fifth wheel. DO NOT RAISE TRAILER OFF OF THE FIFTH WHEEL.

 

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