21
Coupling and Uncoupling
Step 4.
Disconnect Air Lines, Electrical Cable and Hydraulic Lines
• Disconnect air lines from trailer. Connect air line glad hands to dummy
couplers at back of cab, or couple them together.
• Hang electrical cable with plug down to prevent moisture from entering
it.
• Hang hydraulic lines so dirt and moisture will not enter the couplers.
• Make sure lines are supported so they won’t be damaged while driving
the tractor.
Step 5.
Unlock Fifth Wheel
• Raise release handle lock.
• Pull the release handle to “open” position.
• Keep legs and feet clear of the rear tractor wheels to avoid serious injury
in case the vehicle moves.
Step 6.
Pull Tractor Partially Clear of Trailer
• Pull tractor forward until fifth wheel comes out from under the trailer.
• Stop with tractor frame under trailer (prevents trailer from falling to
ground if landing gear should collapse or sink).
Step 7.
Secure Tractor
• Apply parking brake.
• Place transmission in neutral.
Step 8.
Inspect Trailer Supports
• Make sure ground is supporting trailer.
• Make sure landing gear is not damaged.
Step 9.
Pull Tractor Clear of Trailer
• Release parking brakes.
• Check the area and drive tractor clear.
Содержание CR 108
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