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Page Title:
LEFT AND/OR RIGHT HOIST CYLINDERS DO NOT EXTEND OR RETRACT - continued |
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 TM 10-3930-673-20-1
5. LEFT AND/OR RIGHT HOIST CYLINDERS DO NOT EXTEND OR RETRACT (CONT).
2
KNOWN INFO
TEST OPTIONS
Hydraulic oil OK.
Visual inspection.
Are hydraulic hoses leading
STE/ICE-R #51.
POSSIBLE PROBLEMS
to hoist cylinders free of
REASON FOR QUESTION
Hoist cylinder hydraulic hoses
cracked, kinked, or pinched
faulty.
If any hoses are cracked, kinked,
sections?
Hoist cylinder hose connections/
or pinched, hoist cylinders will not
tubes faulty.
operate.
Tandem gear pump faulty.
Main control valve faulty.
Hydraulic joystick control valve
faulty.
Left and/or right hoist cylinders
faulty.
Replace faulty
NO
hoses
(Para 18-25).
YES
3
KNOWN INFO
TEST OPTIONS
Hydraulic oil OK.
Visual inspection.
Are hydraulic hose
Hoist cylinder hydraulic hoses OK.
STE/ICE-R #51.
connections leading to hoist
POSSIBLE PROBLEMS
REASON FOR QUESTION
cylinders tight and free of
Hoist cylinder hose connections/
If any hydraulic hose connections/
leaks? Are hydraulic tubes
tubes faulty.
tubes are leaking, hoist cylinders
undamaged and intact?
Tandem gear pump faulty.
will not operate.
Main control valve faulty.
Hydraulic joystick control valve
faulty.
Left and/or right hoist cylinders
faulty.
Tighten or replace
faulty fittings
NO
(Para 18-25).
Replace damaged
tube (Para 18-26).
YES
2-806
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