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 460 of 790

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

0020 00--9

WINCH AND RIGHT--HAND WHEEL CONTROL INOPERATIVE -- Continued

0020 00

MAIN RELIEF VALVE ADJUSTMENT -- CONTINUED

Disable ejector by manually closing the ejector inhibit ball valve V23 (Figure 7, item 1)

on the DCV bank. 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.

Loosen jam nut (Figure 6, item 2) on main relief valve 13L.

Have assistant start engine and simultaneously hold EJECTOR CONTROL lever in

BACK while holding left--hand SUSPENSION CONTROL lever is RAISE.

While observing transducer T--4 hydraulic pressure on the HDC display (Figure 8, item

1); rotate adjusting screw (Figure 6, item 1) clockwise to increase hydraulic pressure,

counterclockwise to decrease hydraulic pressure until desired pressure is obtained;

tighten jam nut.

Figure 6. Main Relief Valve 13L

Stop engine; relieve hydraulic pressure.

Manually open the ejector inhibit ball valve V23 (Figure 7, item 1) on the DCV bank.

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.

Figure 7. DCV Bank

Figure 8. HDC Control Box