Holland Hitch XA-71-DA - Manual (Page 4)

XL-FW232-02 9
CHECKING THE OPERATION OF THE FIFTH WHEEL
continued
Check the Mounting Brackets Before
Remounting the Top Plate:
1. Inspect the brackets for cracks or damage, and
replace if necessary.
2. Check the rubber bushings for wear.
Replace if necessary.
3. Apply grease to the top bearing surface of the
mounting bracket before remounting the top plate.
4. Inspect the bracket pins (or bolts, depending on the
construction of your fifth wheel) for wear. Replace,
if necessary, using the same configuration as
was removed when the fifth wheel was disassembled.
Periodic Maintenance and Adjustment:
1. Lubricate the lock periodically by greasing through the
fittings in the lock pins.
2. Lubricate the top plate and brackets by greasing
through the two fittings on the sides of the fifth wheel.
3. For maximum service life, the fifth wheel should be
steam cleaned, inspected, and adjusted — as necessary
— every 30,000 miles (50,000 km).
For additional specific instructions, refer to
HOLLAND publication XL-FW303-XX “Fifth Wheel
Maintenance Procedures.”
Adjustment Procedure:
IMPORTANT: Adjustment must be performed with a lock
tester — using a kingpin with SAE approved dimensions —
appropriate for your fifth wheel.
1. Close the locks using the lock tester.
2. Tighten the Allen head adjustment screw in the throat
of the top plate by turning clockwise until tight.
3. Loosen the adjustment screw by turning
counterclockwise 1
1 ⁄
2
turns. The fifth wheel is
now properly adjusted.
4. Verify this adjustment by locking and unlocking
several times.
GENERAL INFORMATION
1. All fifth wheel maintenance, adjustment and
rebuilding must be performed by a qualified person
using proper tools and safe procedures. For more
information, refer to HOLLAND publication
XL-FW303, “Fifth Wheel Maintenance Procedures.”
2. Do not modify or add to the product.
3. Use only genuine HOLLAND parts.
4. Wear safety goggles during installation, removal
and rebuilding.
5. Never strike any part of the item with a steel hammer.
6. Do not weld on this product without written permis-
sion from the factory.
7. Observe standard precautions when lifting.
8. Do not deviate from these instructions. Any changes or
deviations will void all warranties, expressed or
implied, unless written consent is first obtained from
the factory.
9. Check to see that all parts included in the kit are
enclosed in the box.
10. This equipment must not be used or maintained in a
careless manner.
These products are covered by HOLLAND’S Commercial
Products Warranty. HOLLAND reserves the right,
without giving prior notice, to change specifications and
dimensions as designs are altered or improved.
4 XL-FW232-02
REBUILDING PROCEDURES
1. Before attempting to rebuild, review each trouble-
shooting hint on page 2 of this manual. You may
find that rebuilding is not necessary.
2. If rebuilding is required, check the front page of this
manual to be sure you have the correct kit for the fifth
wheel you are about to rebuild.
3. Totally disassemble and clean the top plate.
4. Inspect the top plate for cracks and a loose lock pin
hole. If the plate is cracked, or if the lock pin hole is
elongated, the top plate must be discarded.
Do not attempt to repair or
rebuild if the top plate is cracked
or distorted, or the lock pin does not fit tightly, as
the top plate may fail or the locks may malfunction.
Failure to properly install, operate, or maintain this
fifth wheel could result in tractor and trailer
separation causing death or serious injury to others.
NOTE: When rebuilding, use only Holland rebuilding
kits and replace all roll pins, cotter pins, springs, bolts,
nuts, and washers. Also, check the rebuild kit and
verify that all parts are present (refer to page 3).
Fifth Wheel Reassembly
Before starting to reassemble the fifth wheel, it will be
helpful to fabricate a helper block. It can be made from
hardwood or steel. Refer to FIGURE 1 for proper dimensions.
Primary Lock Installation
1. Install the stationary lock (6) in HOLE A in the casting,
with the large counterbore facing down (see FIGURE 2).
Install the lock washer (37) and lock nut (19) onto the
threaded end of the stationary lock. Tighten until
tight, but still allow the lock to rotate slightly, in order
to ensure alignment with the kingpin. The lock nut will
be tightened fully when adjusting the fifth wheel locks
later in this procedure.
8˝
1˝
1.5˝– 2˝
3˝
8˝
2.5˝
4.5˝
1.5˝– 2˝
FIGURE 1
XA-71-DA
XA-71-OA
19
37
6
HOLE A
FIGURE 2
7
FIGURE 3
2. Apply grease to the spring (7) and install it into the
casting. Position it as shown in FIGURE 3.
continued