22
Maintenance Procedures
XL-FW10028UM-en-US Rev B · 2021-08-04 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF,
and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc.
Figure 50
2. If the fifth wheel is locked, pull the
release handle to unlock the fifth
wheel. If equipped with a manual
secondary lock, first pull the secondary
release handle and hook on the top
plate casting.
3. Use the lock tester to couple and
uncouple the fifth wheel two to
three (2-3) times to help “seat”
the yoke. (Refer to Document No.
XL-FW10082ST-en-US, available on
the internet at www.safholland.us,
which contains specific lock tester
instructions).
4. With the locks closed around the lock
tester, position the adjustment nut
on the yoke shaft so that it is slightly
compressing the rubber washer,
making it difficult to turn by hand
(Figure 49)
.
5. Turn the adjustment nut one (1) additional
turn clockwise to further compress the
rubber washer
(Figure 50)
.
IMPORTANT:
Over-compressing the
rubber washer with
additional turns will take
the fifth wheel out of
proper alignment and
degrade the performance
of the fifth wheel.
6. Repeat the coupling and uncoupling
process with the lock tester at least
twice to help
“seat” the yoke.
7. Confirm that the rubber washer
cannot be turned by hand. If it can,
repeat the adjustment procedures.
8. Remove the lock tester from the
fifth wheel.
Figure 49
IMPORTANT:
Before using the fifth
wheel, visually inspect
all components of the
fifth wheel for proper
operation while coupling
and uncoupling the fifth
wheel with the lock tester.
Failure to repair an
improperly operating
fifth wheel could result in
tractor-trailer separation
which, if not avoided,
could result in death or
serious injury.
ADJUSTMENT NUT
ROTATE CLOCKWISE ONE (1) ADDITIONAL TURN
YOKE SHAFT
RUBBER WASHER
DIFFICULT TO TURN BY HAND
