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358
OPERATION
CAUTION
Attempting to couple with the trailer at an
improper height could result in a false or
improper couple and cause damage to the
tractor, fifth wheel and trailer.
Check to see that the trailer is at the proper height for coupling. The leading edge of the
trailer plate should initially contact the fifth wheel top plate surface about 200 mm (8 in.)
behind the pivot point as the tractor backs under the trailer. Raise or lower the trailer landing
gear as required to obtain this position.
Back under the trailer, keep the trailer kingpin centered in the throat of the fifth wheel. After
picking up the trailer — STOP ? — then continue backing until the fifth wheel locks firmly
on the kingpin. Stopping helps prevent hitting the kingpin too hard.
DANGER
To ensure a positive hook-up or coupling,
these procedures should be followed in
every case. A trailer that is not connected
correctly may disconnect from the tractor
while in motion, resulting in an accident,
personal injury or death.
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