TM-5-2350-378-23-P
ARMORED COMBAT EARTHMOVER (ACE), M9; HYDRAULIC DIAGNOSTIC CENTER
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
JUNE 2012
TM-5-2350-378-23-P - Page 390 of 644
Table
4.
Possible Symptoms Of Failed HDC System Components - Continued.
HDC SYSTEM
POSSIBLE CONSEQUENCES
Solenoid Valve V20 - Shutoff valve - Ejector cylinder
extend to main accumulator (normally closed)
STUCK OPEN:
•
Undesired compensating pressure on ejector
cylinder extend.
•
Ejector will slowly extend due to leakage.
UNSPRUNG MODE:
•
Maximum suspension pressure 2000 psi
(13789.51 kPa).
•
Vehicle cannot be fully raised.
Solenoid Valve V21 - Shutoff valve - (manual)
•
No hydraulic fluid supply to 5/15 micron filters,
suspension, apron, winch, main
ejector from
one side of main pump.
•
Main pump output is cut off on one side, no flow.
Solenoid Valve V22 - Shutoff valve - (manual)
•
No hydraulic fluid supply to main pump filters,
suspension, winch, main ejector
, apron from
one side of main pump.
•
Main pump output is cut off on one side, no flow.
Solenoid Valve V23 - Shutoff valve - (manual)
•
Cannot extend ejector cylinder or cannot retract
ejector cylinder.
•
Cannot dump load or cannot retract ejector to fill
load.
•
Cannot fold dozer blade.
END OF TASK
END OF WORK PACKAGE
TM 5-2350-378-23&P
0025
0025-32
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