Autoquip COIL TRANSFER CARS - Manual (Page 28)

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LIFT UP-STOP VALVE (when used)
The up-stop valve is bolted to a mounting plate that is permanently welded near the end
of the scissors leg on the clevis end of the lift. A mechanical plunger is located on the
end of the valve which, when depressed, blocks the flow of oil until physically released.
An adjustable striker bolt is mounted to a plate that is welded to the base frame, which
is also at the clevis end of the lift. As the lift travels upward, the scissors leg and up-
stop valve assembly swings into the adjustable striker bolt until the up-stop plunger is
depressed and thereby blocking the flow of oil to the cylinders. Once blocked, any
further oil pumped from the power unit will pass over the relief back to the tank.
CAUTION!
Do not operate the power unit on relief for more than a few seconds. When
on relief, the valve will make an audible squealing sound.
The up-stop system can be adjusted to modify vertical travel by:
1. Loosen the holding nuts on either side of the adjustable striker bolt.
2. Screw the adjustable striker bolt in (to shorten travel) or out (to raise travel).
3. Retighten the holding nuts.
CAUTION!
Setting the up-stop valve for travel beyond catalogue limits will cause the lift
to fully raise against physical stops and, if the pump is allowed to continue to
run, cause irreversible damage to the lift structure.
GENERAL MAINTENANCE