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 422 of 790

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

0018 00--9

REAR OF VEHICLE RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE -- Continued

0018 00

Figure 5. HDC Control Box

ACTUATOR PORT 11 PRESSURE TEST

Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 5,

item 5) on the HDC control box.

Using LINE UP or LINE DOWN button (Figure 5, item 3) on the HDC control box, select

V8 on the HDC display (Figure 5, item 2). Using the CHANGE POSITION button

(Figure 5, item 4), close V8 on the HDC display (Figure 5, item 2).

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

Observe transducer T--12 hydraulic pressure on the HDC display (Figure 5, item 1).

Using LINE UP or LINE DOWN button (Figure 5, item 3) on the HDC control box, select

V8 on the HDC display (Figure 5, item 2). Using the CHANGE POSITION button

(Figure 5, item 4), open V8 on the HDC display (Figure 5, item 2).

Stop engine; relieve hydraulic pressure.