TM 5-2350-378-23&P
0025
Table 4.
Possible Symptoms Of Failed HDC System Components - Continued.
HDC SYSTEM
POSSIBLE CONSEQUENCES
Solenoid Valve V12 - Shutoff valve - Suspension relief
SPRUNG MODE:
valve port 9
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
SPRUNG MODE:
valve, main accumulator
Inability to charge main accumulator.
Delayed response in suspension adjustment if
compensating pump cannot keep up with
system demand.
Cannot supply hydraulic fluid to, or return fluid
Solenoid Valve V14 - Shutoff valve - Winch control valve
from, winch motor.
Cannot pay out or pay in winch.
Solenoid Valve V15 - Shutoff valve - Right hand
UNSPRUNG MODE-RAISE:
suspension raise/lower relief
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
UNSPRUNG MODE-RAISE:
suspension raise/lower relief
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.
0025-30
03/15/2011Rel(1.8)root(maintwp)wpno(M10001)
