SAF XL-FW307-02 User Manual
FIFTH WHEEL INSPECTIONS:
1. Inspect the fifth wheel and mounting.
• Confirm that the lube
plate inserts are in place
and firmly attached.
•Tighten loose fasteners.
• Replace missing
fasteners.
• Repair/replace missing, cracked or
otherwise damaged components.
If you have a sliding fifth wheel, make sure both
plungers are fully engaged (see page 4, Figure 4b).
2. Make sure the locks are open. To open locks,
pull release handle.
If Air Release equipped, set tractor brakes and actuate
the fifth wheel control valve to open the locks.
3. Inspect the lock jaws. If
they appear dry, apply
grease to lock jaws and
front of throat directly or
through the lube tube
grease fitting. Coupled
lock jaws and front of
throat can
be lubricated
through lube tube grease
fitting (see Holland
publication XL-FW309-XX
Maintenance Procedures).
4. Tilt the
ramps down.
TRAILER UPPER COUPLER INSPECTIONS:
1. Inspect the leading edge of the
trailer bolster/skid plate. It must be
free of any square or sharp edges.
2. Make sure that there are no bolts
or nuts extending below the
bolster/skid plate
within 8˝ of the
fifth wheel travel
path while coupling.
3. The area that is
supported by the
fifth wheel should
be free of any large
holes or gouges.
4. Any access holes that the
fifth wheel passes below
should have chamfered
and radius edges.
5. Check that any splits from
the skid plate to bolster
plate are welded
adequately and that there are
no sharp edges or abrupt
changes in elevation.
6. The upper coupler should
extend adequately rearward
to maintain full contact with
the fifth wheel during tight
turning. If it does not, at a
minimum, the rear edges
should be chamfered
and radiused.
7. Make sure that any upper
coupler residual grease is free
of heavy coarse grit.
8. Ensure that the upper coupler fifth wheel contact
surface is free of rust. Do not paint contact area!
The area can be conditioned with rust inhibitor.
9. Inspect the kingpin for excessive wear and
damage (use Holland tool TF-0110 “Kingpin
Gage”) along with bolster bow (see SAE J700).
LUBE
TUBE
LOCKS ARE OPEN
If locks are closed,
pull release
handle all the
way out.
Grease
fitting
location
TILT
DOWNWARD
XL-FW307-02 1
You must read and understand the following instructions before operating your fifth wheel.
Failure to follow all of the important operating procedures contained in these instructions may
result in a hazardous condition or cause a hazardous condition to develop.
These instructions apply to the proper operation of your fifth wheel only
. There are other important checks,
inspections, and procedures not listed here that are necessary, prudent, and/or required by law.
3500 LOWLUBE
OPERATING INSTRUCTIONS
I
NCLUDESAIRRELEASE
Keep path of fifth
wheel free of
large holes
& gouges
6˝min.
ACCESS
HOLE
NO TRANSITIONS IN ELEVATION
✔
CHAMPHERED
or RADIUSED
LEADING EDGE
6˝min.
40˝
Keep bolts and nuts
clear of this area
✔
MAKE SURE
THERE ARE NO
SHARP EDGES
FULL
CONTACT
✔
NO!
1. Make sure coupling
area is flat, level
and clear of persons
and obstacles.
2. Center kingpin with
fifth wheel.
3. Back tractor close
to trailer and STOP.
4. Chock trailer wheels.
5. Connect brake lines and light cord.
6. Support slack in lines to prevent interference.
7. Set trailer brakes.
8. Adjust trailer height so fifth wheel will lift
trailer. Trailer should contact fifth wheel 4˝- 6˝
behind fifth wheel bracket pin.
9. Slowly back into trailer.
FIFTH WHEEL
MUST LIFT
TRAILER
FIFTH WHEEL
TILTED DOWN
USE LOW
GEAR
4˝- 6˝
If you do not obtain a proper couple,
repeat the coupling sequence. Do not
use any fifth wheel that fails to operate properly.
The coupling procedure is not
complete without a visual inspection.
You must get out of the tractor and verify that the fifth
wheel is properly coupled to the kingpin as shown in
Item 11.
FIFTH WHEEL
WILL NOT LIFT
TRAILER
TRAILER
TOP
KINGPIN
➍
➎➏
➐
10. Do a pull test.
11. Get out of the tractor and visually inspect.
Be sure to complete all three inspections.
TRAILER
BRAKES
LOCKED
1
2
3
➠
NO GAP!
NUT AND WASHER SNUG
AGAINST FIFTH WHEEL
LOCKS COMPLETELY
CLOSED AROUND
KINGPIN
2 XL-FW307-02
COUPLING PROCEDURES:
➠
➠
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