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 166 of 790
TM 5--2350--378--24&P
0010 00--13
BUMP STOPS INOPERATIVE -- Continued
0010 00
Figure 7. HDC Control Box
BUMP STOP CYLINDER LEAKAGE TEST
Stop engine; relieve hydraulic pressure.
Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 7, item 5)
on the HDC control box.
Move SPRUNG/UNSPRUNG lever to UNSPRUNG.
For left bump stop circuit; using LINE UP or LINE DOWN button (Figure 7, item 3), select
V10 on the HDC display (Figure 7, item 2). Close V10 on the HDC display (Figure 7,
item 2), by selecting the CHANGE POSITION button (Figure 7, item 4) on the HDC
control box.
For right bump stop circuit; using LINE UP or LINE DOWN button (Figure 7, item 3),
select V9 on the HDC display (Figure 7, item 2). Close V9 on the HDC display (Figure 7,
item 2), by selecting the CHANGE POSITION button (Figure 7, item 4) on the HDC
control box.
Start engine and move SPRUNG/UNSPRUNG lever to SPRUNG. Note the time it takes
for the bump stops to extend fully.
Stop engine; relieve hydraulic pressure.
Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 7, item 5)
on the HDC control box.
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