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 112 of 790

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

0007 00--19

ALL HYDRAULIC FUNCTIONS INOPERATIVE -- Continued

0007 00

Figure 15. HDC Control Box

HYDRAULIC PRESSURE AT PORT 13L CHECK

Stop engine and relieve hydraulic pressure.

Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 15,

item 5) on the HDC control box.

Using LINE UP or LINE DOWN button (Figure 15, item 3), select V1 on the HDC display

(Figure 15, item 2). Close V1 on the HDC display (Figure 15, item 2) by selecting the

CHANGE POSITION button (Figure 15, item 4) on the HDC control box.

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

hold EJECTOR CONTROL lever to BACK. Read tranducer T--4 hydraulic pressure on

the HDC display (Figure 15, item 1). If hydraulic pressure is not within limits, continue

with the following step.

While still holding EJECTOR CONTROL lever in BACK, have assistant move left--hand

SUSPENSION CONTROL lever to RAISE. Read transducer T--4 hydraulic pressure on

the HDC display (Figure 15, item 1). If pressure is not within limits, main relief valve 13L

requires adjustment.

Release EJECTOR and SUSPENSION CONTROL levers.

Stop engine; relieve hydraulic pressure.