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Maintenance Procedures
6.
Verify the proper adjustment by locking
and unlocking fifth wheel several times
with lock tester. Check that fifth wheel
is properly locked (Figure 41).
NOTE: To unlock the fifth wheel, push
down on the lock tester and
rotate the "J" hook under the
front skirt of the casting. Then
pull the lock tester handle back.
7.
Rotate lock tester from side-to-side to
ensure that lock is not overtightened.
Lock should not grip kingpin and the
tool should rotate freely (Figure 42).
8.
Disengage lock tester J-Hook from
front skirt of casting and re-check for
free play in lock by sliding lock tester
forward and backward using pin gage
to measure free play (Figure 42).
Free play should be 0.040" (1.02 mm)
minimum. If free play still exceeds
0.080" (2.03 mm) repeat procedure
and adjust one more notch.
NOTE: If there is still excessive free
play in the locks with the
adjusting pin on the last (third)
notch, then the fifth wheel
should be rebuilt using the
appropriate SAF-HOLLAND
service kit.
IMPORTANT: Before using the fifth
wheel, proper operation
MUST be verified.
Failure to verify that the
fifth wheel is operating
properly could result in
tractor-trailer separation
which, if not avoided,
could result in death or
serious injury.
19
XL-FW10055UM-en-US Rev E · 2018-02-15 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF,
Figure 41
LOCK NOTCH
BEHIND RIB
Figure 42
and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc.
LOCK COMPLETELY
CLOSED AROUND
KINGPIN
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