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 250 of 790
TM 5--2350--378--24&P
0013 00--25
FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE --
Continued
0013 00
SUSPENSION CONTROL RELIEF VALVE ADJUSTMENT
Stop engine; relieve hydraulic pressure.
Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 12,
item 5) on the HDC control box.
NOTE
If left corner of vehicle will not raise, perform this adjustment at
relief valve 3L and actuate left--hand SUSPENSION CONTROL
lever. If right corner of vehicle will not raise, perform this
adjustment at relief valve 3R and actuate right--hand
SUSPENSION CONTROL lever.
Port 3R RELIEF VALVE: Using LINE UP or LINE DOWN button (Figure 12, item 3),
select V15 on the HDC display (Figure 12, item 2). Close V15 on the HDC display
(Figure 12, item 2) by selecting the CHANGE POSITION button (Figure 12, item 4) on
the HDC control box.
Port 3L relief valve: Repeat previous step for port 3L and close V16 instead of V15.
Start engine and have assistant move SPRUNG/UNSPRUNG lever to UNSPRUNG and
SUSPENSION CONTROL lever to RAISE. Read transducer T--1 hydraulic pressure on
the HDC display (Figure 12, item 1).
Loosen jam nut (Figure 13, item 1) and turn adjusting screw (Figure 13, item 2)
clockwise to increase pressure; counterclockwise to decrease pressure, as necessary.
Adjust pressure to within limits, and tighten jam nut (Figure 13, item 1).
Stop engine; relieve hydraulic pressure.
Port 3R relief valve: Using LINE UP or LINE DOWN button (Figure 12, item 3), select
V15 on the HDC display (Figure 12, item 2). Open V15 on the HDC display (Figure 12,
item 2) by selecting the CHANGE POSITION button (Figure 12, item 4) on the HDC
control box.
Port 3L relief valve: Repeat previous step for port 3L and open V16 instead of V15.
Figure 12. HDC Control Box
Figure 13. Suspension Control Relief
Valve Adjustment
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