7
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.
Operation Instructions
Figure 8
Figure 6
Figure 5
3. Tilt the ramps of the fifth wheel
downward
(Figure 5)
.
4. Ensure that the locks are open.
If the locks are closed:
a.
Manual Release:
If equipped with
a manual secondary lock, first pull
the secondary release handle and hook
on the top plate casting
(Figure 6)
.
Pull the release handle completely
out
(Figure 7).
b.
Air Release:
Set the tractor parking
brake and pull the fifth wheel release
valve until the locking mechanism
opens and locks in place. Release
the pull valve. Release the tractor
parking brake.
5. Visually inspect the fifth wheel throat
to ensure that the locks are completely
open and ready to accept the kingpin
(Figure 7)
.
6. If the locks are NOT completely open
(Figure 7)
, check the following:
a. Nut and washer at the front of the
fifth wheel are NOT snug against
the fifth wheel.
b. Release handle is in the extended
“open” position.
If both of these conditions exist, you will
still be able to couple the fifth wheel
even though the lock jaws appear
closed. The movement of the kingpin
into the fifth wheel lock jaws will allow
them to open and successfully couple.
If either of the above conditions DO
NOT exist, repeat Steps 4-6.
7. Inspect the leading edge of the trailer
bolster/skid plate. It MUST be free of
any square or sharp edges
(Figure 8)
.
TILT DOWNWARD
Figure 8
Figure 6
Figure 5
CHAMFERED (PREFERRED)
OR LARGE RADIUSED
LEADING EDGE
2"
MIN
20°
Figure 7
LOCKS ARE
OPEN
LOCKS ARE
CLOSED
