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 388 of 644
Table
4.
Possible Symptoms Of Failed HDC System Components - Continued.
HDC SYSTEM
POSSIBLE CONSEQUENCES
Solenoid Valve V12 - Shutoff valve - Suspension relief
valve port 9
SPRUNG MODE:
•
Inability to charge main accumulator.
•
Delayed response in suspension adjustment if
compensating pump cannot keep up with
system demand.
•
Relief valve inactive.
•
Possible hydraulic system damage if
compensating pump fails to regulate pressure.
Solenoid Valve V13 - Shutoff valve - Suspension relief
valve, main accumulator
SPRUNG MODE:
•
Inability to charge main accumulator.
•
Delayed response in suspension adjustment if
compensating pump cannot keep up with
system demand.
Solenoid Valve V14 - Shutoff valve - Winch control valve
•
Cannot supply hydraulic fluid to, or return fluid
from, winch motor.
•
Cannot pay out or pay in winch.
Solenoid Valve V15 - Shutoff valve - Right hand
suspension raise/lower relief
UNSPRUNG MODE-RAISE:
•
No hydraulic fluid supply (3) to right front
actuators 1 & 2 through right front wheel valve.
•
Right front of vehicle cannot be raised (was
raised in sprung mode and now supply is cut off
and cannot get 3500 psi [24131.65 kPa]
pressure.)
UNSPRUNG MODE-LOWER:
•
No hydraulic fluid return (3) from front actuators
1 & 2 through right front wheel valve.
•
Cannot lower right front of vehicle.
•
Cannot doze or fill load evenly.
Solenoid Valve V16 - Shutoff valve - Left hand
suspension raise/lower relief
UNSPRUNG MODE-RAISE:
•
No hydraulic fluid supply (3) to left front
actuators 1 & 2 through left front wheel valve.
•
Cannot raise left front of vehicle (was raised in
sprung mode and now supply is cut off and
cannot get 3500 psi [24131.65 kPa] pressure.)
UNSPRUNG MODE-LOWER:
•
No hydraulic fluid supply (3) from front actuators
1 & 2 through left front wheel valve.
•
Cannot lower left front of vehicle.
•
Degraded dozing or scraping capability.
TM 5-2350-378-23&P
0025
0025-30
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