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 TM 55-1905-221-14-1
4-27. RAMP HOISTING ASSEMBLY (Continued).
LOCATION/ITEM
ACTION
REMARKS
SERVICE (Cont)
19. Counter-
a. Disconnect cable from winch to
balance Valve
remove load from system.
b. Install 3,000 psi (20,685 kPa)
pressure gage with shutoff
valve, in system at tee
fitting or port in counter-
balance valve.
c.
Place control valve in
position for lowering ramp.
d. Adjust knob on top of counter-
balance or valve until system
pressure is 3,000 psi (20,685
kPa.). A pilot pressure of
3,000 psi (20,685 kPa) will
open the counterbalance valve
and allow the ramp to be
lowered.
e. Using clean cloth and cleaning
solvent remove all foreign
matter from exterior of the
counterbalance valve.
4-96
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