SECTION V: TROUBLESHOOTING
TM 9-2350-256-20
C
D
E
F
G
Attempt operation of the hoisting boom, hoist
winch, and spade. If the hoisting boom, hoist winch,
and spade do not operate, troubleshoot main
hydraulic system and/or auxiliary hydraulic system.
If the hoisting boom, hoist winch, and spade operate
go to step B.
Visually inspect for signs of main winch mechanical
failure. If signs of mechanical failure exist, notify
Direct Support Maintenance.
If no signs of
mechanical failure exist, go to step C.
Do not attempt to loosen or tighten
hydraulic fittings or lines when system is
pressurized. Severe injury or death to
personnel may result.
Inspect for any
damaged or restricted hoses.
Replace hoses as necessary (see paragraph 11-14). If
no damaged or restricted hoses exist, go to step D.
Test for hydraulic motor failure. Remove hose No.
47 from rear of hydraulic motor (see paragraph
12-1). A large volume of oil discharged from port
when main winch control valve is engaged indicates
a faulty motor. If a faulty hydraulic motor exists,
notify Direct Support Maintenance.
If hydraulic
motor is not faulty, go to step E.
Inspect manual control and linkage (see paragraph
11-4) for disconnected, damaged, or missing parts.
Connect linkage and replace or repair missing or
damaged parts (see paragraph 11-3). If main winch
cable is not damaged and is properly attached to
drum, go to step F.
Ensure main winch cable is not damaged and is
properly attached to drum. Replace main winch
cable if required (see paragraph 11-5). If main winch
cable is not damaged and is properly attached to
drum, go to step G.
Do not attempt to loosen or tighten
hydraulic fittings or lines when system is
pressurized. Severe injury or death to
personnel may result.
Inspect hydraulic lines and fittings for leaks.
Replace leaking hydraulic lines and tighten leaking
connections (see paragraph 12-1). If leaks persist,
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