h7. M1089 LH 30K WINCH DOES NOT OPERATE (CONT)
KNOWN INFO
REASON FOR QUESTION
TEST OPTIONS
Repair or replace LH 30K winch
assembly (para 16-63).
NO
YES
3.
Pressure Test or
STE/ICE-R Test #51
Hydraulic tank oil level OK.
MAIN WINCH LH FREE SPOOL
switch to OFF.
MAIN WINCH LH FREE SPOOL
switch OK.
MAIN WINCH LH FREE SPOOL
solenoid valve OK.
RH 30K winch operates.
Hydraulic tubes and fittings
OK.
LH and RH stifflegs OK.
Upper main control valve
assembly OK.
M1089 linear directional
control valve OK
POSSIBLE PROBLEMS
Faulty LH 30K winch
assembly.
Faulty pressure relief valve
assembly.
Repair or replace pressure relief
valve assembly (para 16-65).
Is pressure between
2,925-2,975 PSI
(20,168-20,512 kPa) at
30K winch relief valve?
If pressure is not between
2,925-2,975 PSI (20,168-
20,512 kPa), 30K winch relief
valve is faulty. If pressure is
2,925-2,975 PSI (20,168-
20,512 kPa), LH 30K winch
assembly is faulty.
TM 9-2320-366-34-1
2-1010 Change 1
