TM-5-2350-378-24-P
HYDRAULIC DIAGNOSTIC CENTER (HDC) SUPPORTING ARMORED COMBAT EARTHMOVER (ACE), M9
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
TM-5-2350-378-24-P - Page 252 of 790
TM 5--2350--378--24&P
0013 00--27
FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE --
Continued
0013 00
Figure 14. HDC Control Box
NO. 1 ACTUATOR PRESSURE TEST (PORT 3)
Stop engine; relieve hydraulic pressure.
Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 14,
item 2) on the HDC control box.
NOTE
This test is performed at No. 1 actuator of front corner which will
not raise.
Start engine. Place SPRUNG/UNSPRUNG lever in SPRUNG. Move (right or left, as
applicable) SUSPENSION CONTROL lever to RAISE. Read transducer T--5 (front right
actuator) or T--6 (front left actuator) hydraulic pressure on the HDC display (Figure 14,
item 2).
Stop engine; relieve hydraulic pressure.
SOLENOID VALVE V15/V16 TEST
Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 14, item
2) on the HDC control box.
Start engine.
Wait until transducer T--1 hydraulic pressure on the HDC display (Figure 14, item 1) is
less than 500 psi (3447.379 kPa).
Move SUSPENSION CONTROL lever (left--hand or right--hand lever, as applicable) to
RAISE.
Read transducer T--1 hydraulic pressure on the HDC display (Figure 14, item 1).
Stop engine; relieve hydraulic pressure.
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