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 240 of 790

TM 5--2350--378--24&P

0013 00--15

FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE --

Continued

0013 00

MAIN RELIEF VALVE PRESSURE TEST

Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 8,

item 5) on the HDC control box.

Using LINE UP or LINE DOWN button (Figure 8, item 3), select V1 on the HDC display

(Figure 8, item 2). Close V1 on the HDC display (Figure 8, item 2) by selecting the

CHANGE POSITION button (Figure 8, item 4) on the HDC control box.

Have assistant start engine and move ejector forward.

Move SPRUNG/UNSPRUNG lever to SPRUNG and move EJECTOR CONTROL lever

to BACK. Read transducer T--3 hydraulic pressure on the HDC display (Figure 8,

item 1).

While simultaneously holding EJECTOR CONTROL lever in BACK, have assistant

move right--hand SUSPENSION CONTROL lever to RAISE. Read transducer T--3

hydraulic pressure on the HDC display (Figure 8, item 1).

Using LINE UP or LINE DOWN button (Figure 8, item 3), select V1 on the HDC display

(Figure 8, item 2). Open V1 on the HDC display (Figure 8, item 2) by selecting the

CHANGE POSITION button (Figure 8, item 4) on the HDC control box.

Stop engine and relieve hydraulic pressure.

Figure 8. HDC Control Box