User Manual

The popup will inform the operator
when to release the switch.
JOST Fifth Wheel Indication
If equipped with JOST Fifth Wheel
NOTE
The fifth wheel will not unlock unless
the
vehicle is stopped and the parking
brake is set. In this situation, a red-col-
ored popup appears, informing the op-
erator that kingpin release is not avail-
able and to set the parking brake. This
will require restarting this procedure.
5. Release the switch.
The unlock symbol on the Kingpin
Release switch will turn of
f.
6. Ease tractor forward enough for the
kingpin to clear the fifth wheel
(about 12 to 18 inches).
NOTE
Do not drive tractor free of trailer.
7. If the tractor has a rear air
suspension, deflate (dump) the
rear suspension enough so that the
fifth wheel will smoothly separate
from the trailer
.
Suspension Dump Symbol
8. Ease tractor forward, clearing the
trailer
.
9. If the rear suspension was
deflated, return rear suspension to
its normal height.
How to Release the Kingpin
Manually
CAUTION
Do not deflate the rear suspension be-
fore
unlocking the fifth wheel. Deflating
the rear suspension before unlocking
the fifth wheel could cause difficulty
during uncoupling and result in dam-
age to the fifth wheel and kingpin.
NOTE
The specific method required to oper-
ate
the fifth wheel release handle will
depend on the fifth wheel manufactur-
er and model. The operator should be
familiar with this method prior to at-
tempting this procedure.
To release the kingpin and separate tractor
from trailer
1.
Position the tractor and trailer in a
straight line on firm, level ground.
2. Set both the tractor and trailer
parking brakes.
3. Exit cab and lower the trailer
landing gear.
DRIVING - Fifth Wheel
158 Y53-6113-1A1 (11/20)
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