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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).
4
KNOWN INFO
TEST OPTIONS
Hydraulic oil OK.
Pressure test.
Is hydraulic oil flow rate at
Hoist cylinder hydraulic hoses OK.
STE/ICE-R #51.
tandem gear pump at 42.3 to
Hoist cylinder hose connections/
REASON FOR QUESTION
tubes OK.
55.2 gpm (160 to 209 Lpm)?
If hydraulic oil flow rate is not at
POSSIBLE PROBLEMS
42.3 to 55.2 gpm (160 to 209
Tandem gear pump faulty.
Lpm), tandem gear pump faulty.
Main control valve faulty.
Hydraulic joystick control valve
faulty.
Left and/or right hoist cylinders
faulty.
Test/replace faulty
NO
tandem gear pump
(Para 18-3).
YES
5
KNOWN INFO
TEST OPTIONS
Hydraulic oil OK.
Pressure test.
Is hydraulic oil pressure at
Hoist cylinder hydraulic hoses OK.
STE/ICE-R #51.
main control valve between
Hoist cylinder hose connections/
REASON FOR QUESTION
tubes OK.
3050 +/- 50 psi (21029.75 +/-
If hydraulic oil pressure is not at
Tandem gear pump OK.
345 kPa)?
3050 +/- 50 psi (21029.75 +/-
POSSIBLE PROBLEMS
345 kPa), main control valve
Main control valve faulty.
faulty.
Hydraulic joystick control valve
faulty.
Left and/or right hoist cylinders
faulty.
Replace faulty main
NO
control valve
(Para 18-5).
YES
2-808
Change 1
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