•
Verify that the handle is fully
retracted as shown in
10. Release the tractor parking brakes.
Test for kingpin lockup by slowly inching the
tractor forward, pulling the trailer against the
chocks.
11. After lockup is completed, connect the tractor-to-
trailer air system lines and the electrical cable to
the trailer. Take care to prevent dirt or foreign
material from entering the air system lines.
NOTICE
Always make sure the connection hanger keeps
the trailer air hoses and electrical cables
positioned so that they do not rub on anything.
Rubbing may wear through hoses or cables,
resulting in air leaks, or exposed or broken wires,
potentially affecting trailer brake or electrical
systems.
12. Charge the air brake system with air, checking
that the air connections do not leak.
WARNING
Incorrect fifth wheel lock adjustment could cause
the trailer to disconnect, possibly resulting in
serious personal injury or death.
13. With the trailer wheels chocked and the brakes
set, check for clearance between the kingpin and
the fifth wheel jaws by moving the tractor forward
and backward against the locked kingpin. If slack
is present, uncouple the trailer and have the fifth
wheel inspected and adjusted by a certified
technician.
Jost Fifth Wheel Coupling
1.
Chock the front and rear of the trailer tires to
prevent the trailer from moving.
2.
Tilt the fifth wheel ramps down.
3.
Unlock the fifth wheel jaws.
Lift the release handle up into the wide slot and
then pull the release handle out while moving it
forward as shown in
Lock the handle
into the open position on the notch provided.
4.
Back the vehicle close to the trailer, centering the
kingpin on the fifth wheel throat as shown in
f311350
08/24/2021
A
A. Verify the nut and washer are snug against the fifth
wheel
Fig. 14.14, Nut and Washer Snug Against Locked
Holland FW35
f311403
11/12/2021
1
2
1.
Lock Completely Closed Around Kingpin
2.
Lock Retainer Securing Lock
Fig. 14.15, Holland FWAL Lock Closed Around Kingpin
f311401
11/15/2021
1
3
2
1.
Handle
2.
Locking Plate Rear Notch (behind top of bracket)
3.
Locking Plate Front Notch (behind arm of bracket)
Fig. 14.16, Holland FWAL Handle Fully Retracted
Fifth Wheels
14.6
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