Fifth Wheel Instructions 325
Connect the air brake lines and the electri-
cal power cord. Make sure that any slack in
the lines is supported so that the brake lines
do not become entangled. Set the trailer
brakes by pulling out the Trailer Supply
control on the dashboard.
W5000713
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 8 in.
(200 mm) behind the pivot point as the
tractor backs under the trailer. Raise or
lower the trailer landing gear as required to
obtain this position.
WARNING
Attempting to couple with the trailer at
an improper height could result in a
false or improper couple and cause dam-
age to the tractor, fifth wheel and trailer,
and possible personal injury.
Back under the trailer, keeping 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.
As an initial check, pull forward to test the
completeness of the coupling.
W9000237
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