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XL-FW10009UM-en-US Rev F · 2021-06-16 · 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.
Troubleshooting
POSSIBLE CAUSE
SOLUTION
The fifth wheel lock requires adjustment
Follow the procedures contained in Section 14.
The fifth wheel cannot be adjusted further.
The fifth wheel MUST be rebuilt using the appropriate service kit.
The kingpin is loose
Repair the trailer.
The kingpin is worn.
Check the kingpin for acceptable wear with HOLLAND
Kingpin Gauge TF-0110. Replace the kingpin if necessary.
Excessive Movement between Fifth Wheel and Kingpin:
POSSIBLE CAUSE
SOLUTION
The trailer may be putting too much pressure
down on the fifth wheel.
Lessen weight on the fifth wheel by raising the trailer with the
landing gear.
The tractor is too low.
Raise the tractor suspension to the proper ride height.
Accumulated rust or grime are interfering
with the release mechanism.
Clean the mechanism and add light oil to the plunger-to-
bracket contact area. Refer to
Figures 25-27 and 29-31
.
The air cylinder tube and/or shaft may be dented,
bent, or otherwise damaged.
Replace the air cylinder using the appropriate service kit.
The air cylinder may be dry inside.
Disconnect the air line at the air cylinder and add 2-3
drops of air tool oil. Reconnect and activate air a few
times. (Refer to Section 13 in this manual.)
The air release system from the tractor is not
functioning properly.
Disconnect the air line at the air cylinder and apply shop
air at 100 to 120psig. If the slide release works properly,
check the truck system, including the air lines and control
valve. The air flow into and out of the air cylinder should
meet a “Coefficient of Velocity” (CV), or Flow Factor of
0.24 or greater (15 scfm at 100psi). To ensure proper
product performance, the exhaust flow must be full flow,
non-restrictive/non-clogging, without any component
which will act as a check valve, to ensure free flow-
through exhaust in both directions.
Difficulty in Sliding Fifth Wheel: