TM 9--2350--292--20--1
0093 00--6
MAIN WINCH FAILS TO RELEASE -- CONTINUED
0093 00
CONTINUED FROM STEP I
no
yes
1. Attempt to payout main winch and record
pressures at main winch ports PMO and PMI.
2. Shut down hydraulics and main engine
(TM 9--2350--292--10).
Is pressure at port PMO 385--470 psi and is pressure at
port PMI 50 psi or less?
Notify Direct Support Maintenance
I
3. Place main winch selector valve in the full
payout position and attempt to payout winch.
4. Record pressures at inhaul test port and
crossport relief valve manifold test port of
main winch.
J
Is pressure at crossport relief valve test port 1100 psi or
higher and is pressure at inhaul test port 250 psi or less?
FORWARD
no
yes
Go to WP 0091 00 Step E.
1. Disconnect main winch quick--disconnects at main
winch manifold.
2. Remove plug from port LS of hoist and main winch
directional control valve assembly.
3. Disconnect hose and adapter from port LS1 of hoist
and main winch directional control valve assembly.
Install hose and adapter in port LS and plug port LS1.
4. Start main engine, energize hydraulics, and set engine
speed to 1800 rpm (TM 9--2350--292--10).
5. Place main winch control lever in the payout position
and record pressures at ports MS and X1.
6. Shut down hydraulics and main engine
(TM 9--2350--292--10).
Are both pressure readings 4100--4300 psi?
K
no
yes
Replace hoist and main winch direc-
tional control valve assembly (WP
0556 00). Verify fault is corrected.
WARNING
Notify Direct
Support
Maintenance.
END OF TASK
