Quantcast BOOM EXTEND CYLINDER SLOW OR DOES NOT EXTEND OR RETRACT - continued - TM-10-3930-673-20-10876

 

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BOOM EXTEND CYLINDER SLOW OR DOES NOT EXTEND OR RETRACT - continued - TM-10-3930-673-20-10875
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TM-10-3930-673-20-1 All Terrain Lifter Army System (ATLAS) 10 000 lb Capacity Manual
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BOOM EXTEND CYLINDER SLOW OR DOES NOT EXTEND OR RETRACT - continued - TM-10-3930-673-20-10877
TM 10-3930-673-20-1
6. BOOM EXTEND CYLINDER SLOW OR DOES NOT EXTEND OR RETRACT (CONT).
4
KNOWN INFO
TEST OPTIONS
Hydraulic oil OK.
Pressure test.
Is hydraulic oil flow rate at
Extend cylinder hydraulic hoses
STE/ICE-R #51.
large section of tandem gear
OK.
REASON FOR QUESTION
Extend cylinder hose connections
pump at 41.3 to 55.2 gpm
If hydraulic oil flow rate is not at
OK.
(156 to 209 Lpm)?
41.3 to 55.2 gpm (156 to 209
POSSIBLE PROBLEMS
Lpm), tandem gear pump faulty.
Tandem gear pump faulty.
Main control valve faulty.
Hydraulic joystick control valve
faulty.
Extend cylinder 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
Extend cylinder hydraulic hoses
STE/ICE-R #51.
main control valve at 3050 +/-
OK.
REASON FOR QUESTION
Extend cylinder hose connections
50 psi (21029.75 +/- 345 kPa)?
If hydraulic oil pressure is not at
OK.
3050 +/- 50 psi (21029.75 +/- 345
Tandem gear pump OK.
kPa), main control valve faulty.
POSSIBLE PROBLEMS
Main control valve faulty.
Hydraulic joystick control valve
faulty.
Extend cylinder faulty.
Replace faulty main
NO
control valve
(Para 18-5).
YES
2-818
Change 1

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