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 TM 55-1905-221-14-2
RAMP HOIST RELIEF VALVE (Continued).
LOCATION/ITEM
ACTION
REMARKS
INSTALLATION
7.
Relief
a. Install relief valve (3).
Valve
b. Reconnect hoses (2 and 1).
ADJUSTMENT
8.
a. Install 3,000 psi pressure
gage, with shutoff valve,
in system at tee fitting
or port in relief valve.
b. Wrap several turns of heavy
manila rope around winch drum,
and belay running end to
prevent operation of winch.
c. Slowly open control valve
to fully open position, and
check indication on test
gage. Pressure should be
no greater than 2,000 psi.
d. Adjust pressure, if necessary,
by rotating adjusting screw
on relief valve. Turn screw
in (clockwise) to increase
pressure; turn out (counter-
clockwise) to decrease
pressure.
e. Close shutoff valve at test
gage to prevent rapid and
sudden changes from damaging
gage.
5-107
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