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 282 of 790

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

0014 00--11

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

Continued

0014 00

Figure 6. HDC Control Box

FRONT ACTUATOR PRESSURE TEST

Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 6,

item 5) on the HDC control box.

For front left: Using LINE UP or LINE DOWN button (Figure 6, item 3), select V3 on the

HDC display (Figure 6, item 2). Close V3 on the HDC display (Figure 6, item 2) by

selecting the CHANGE POSITION button (Figure 6, item 4) on the HDC control box.

Have assistant start engine and move the SPRUNG/UNSPRUNG lever to the

UNSPRUNG mode. Read transducer T--10 hydraulic pressure on the HDC display

(Figure 6, item 1).

Using LINE UP or LINE DOWN button (Figure 6, item 3), select V3 on the HDC display

(Figure 6, item 2). Open V3 on the HDC display (Figure 6, item 2) by selecting the

CHANGE POSITION button (Figure 6, item 4) on the HDC control box.

For front right: Using LINE UP or LINE DOWN button (Figure 6, item 3), select V2 on

the HDC display (Figure 6, item 2). Close V2 on the HDC display (Figure 6, item 2), by

selecting the CHANGE POSITION button (Figure 6, item 4) on the HDC control box.

Have assistant keep SPRUNG/UNSPRUNG lever in the UNSPRUNG mode. Read

transducer T--11 hydraulic pressure on the HDC display (Figure 6, item 1).

Using LINE UP or LINE DOWN button (Figure 6, item 3), select V2 on the HDC display

(Figure 6, item 2). Open V2 on the HDC display (Figure 6, item 2) by selecting the

CHANGE POSITION button (Figure 6, item 4) on the HDC control box.

Stop engine; relieve hydraulic pressure.