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Instruments and Controls 105
Suspension Level
CAUTION
The vehicle must never be driven with
the air springs deflated. Damage to air
suspension parts will occur if springs are
not inflated properly.
Tractors with rear air suspension have a
control for deflating the air springs. Use this
when uncoupling from trailers. See page
276 for correct operation when uncoupling.
The switch has a safety latch to prevent ac-
cidental engagement. Depress the latch and
press in the bottom part of the switch to
deflate the air springs. A telltale in the in-
strument cluster will light up when the
switch is in the “on” position.
W3001341
Sliding Fifth Wheel
The release must never be operated
while the vehicle is operating on the
road. Fifth wheel position adjustment
must only be done when stationary.
Damage to the fifth wheel, trailer king-
pin and slider may occur if not operated
properly and may lead to an accident,
causing serious personal injury or death.
Tractors with a sliding fifth wheel mount-
ing have an air operated release as standard
equipment. The sliding fifth wheel is used
for distributing loads more favorably be-
tween the front and rear axles to comply
with varying state and provincial laws. See
page 280 for correct operation.
Depress the latch and press in the bottom
part of the switch to release the slider locks.
W3001346