KNOWN INFO
REASON FOR QUESTION
YES
NO
TEST OPTIONS
Repair or replace upper main
valve assembly (para 16-83).
2.
h7. M1089 LH 30K WINCH DOES NOT OPERATE (CONT)
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.
M1089 linear directional
control valve OK.
POSSIBLE PROBLEMS
Faulty upper main valve
assembly.
Faulty LH 30K winch
assembly.
Faulty pressure relief valve
assembly.
Is pressure between
2,950-3,050 PSI
(20,340-21,030 kPa) at
output of upper main valve
assembly?
If pressure is not between
2,950-3,050 PSI
(20,340-21,030 kPa), upper
main valve assembly is faulty.
TM 9-2320-366-34-1
2-1008.2 Change 1
