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 106 of 790

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

0007 00--13

ALL HYDRAULIC FUNCTIONS INOPERATIVE -- Continued

0007 00

Figure 9. HDC Control Box

HYDRAULIC PRESSURE AT PORT 13R CHECK

Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 9, item 5)

on the HDC control box.

Using LINE UP or LINE DOWN button (Figure 9, item 3), select V1 on the HDC display

(Figure 9, item 2). Close V1 on the HDC display (Figure 9, item 2) by selecting the

CHANGE POSITION button (Figure 9, item 4) on the HDC control box.

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

EJECTOR CONTROL lever in BACK. Read transducer T--3 pressure on the HDC

display (Figure 9, item 1). If hydraulic pressure is not within limits, continue with the

following step.

While assistant is still holding EJECTOR CONTROL lever in BACK, have assistant move

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

on the HDC display (Figure 9, item 1). If hydraulic pressure is not within limits, main

relief valve 13R requires adjustment.

Release EJECTOR CONTROL and right--hand SUSPENSION CONTROL levers.

Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 9, item 5)

on the HDC control box.