6
Uncoupling:
To uncouple the lock tester, pull the secondary
lock release handle (
9
) out, raise it up and
engage the handle lug with the top plate casting
(
Figure 12
). Then, pull the release handle (
16
) out
and raise it up and engage its handle lug with
the top plate casting (
Figure 13
). This will retract
the plunger (
17
) and hold it in so that the step in
the plunger is not visible in the throat area. As
the kingpin on the lock tester is pulled out
(rearward), the swinging lock (
6
) will open. As
the swinging lock opens, it will push the plunger
back slightly, causing the release handle (
16
) to
extend outward slightly. This action disengages
the release handle from its notch in the casting,
allowing the release handle to move to the
locked position. As the swinging lock (
6
) opens
past the plunger (
17
), the plunger will extend
into the throat area and become visible again.
The release handle (
16
) will move inward. As the
swinging lock (
6
) opens fully, it will contact the
retracted secondary lock (
10
), pushing the
secondary lock release handle (
9
) slightly
outward, causing its handle lug to disengage
and allowing the handle to drop slightly.
WARNING:
If the top plate assembly does not
operate properly,
DO NOT USE IT.
Review the
troubleshooting hints and rebuilding procedures
or contact your local HOLLAND representative
for assistance.
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 construction of your fifth wheel) for wear.
Replace if necessary, using the same
configuration as was removed.
Periodic Maintenance and Adjustment:
1.
Lubricate 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
FW-TE-14C “Fifth Wheel Maintenance
Procedures.”
Adjustment Procedure:
IMPORTANT:
Adjustment must be performed
with a lock tester having a kingpin to the SAE
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.
Figure 12
Figure 13
