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 144 of 790

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

APRON WILL NOT RAISE -- Continued

0009 00

Figure 6. Apron Control Pressure Relief Valve

Figure 7. DCV Bank

Figure 8. HDC Control Box

CIRCUIT 19 RELIEF VALVE ADJUSTMENT -- CONTINUED

Stop engine and relieve hydraulic pressure.

Manually close ejector inhibit ball valve V23 (Figure 8, item 1) on the DCV bank.

Using LINE UP or LINE DOWN button (Figure 7, item 3), select V1 on the HDC display

(Figure 7, item 2). Close V1 on the HDC display (Figure 7, item 2) by selecting the

CHANGE POSITION button (Figure 7, item 4) on the HDC control box. Select V17 on

the HDC display (Figure 7, item 2). Close V17 on the HDC display (Figure 7, item 2) by

selecting the CHANGE POSITION button (Figure 7, item 4) on the HDC control box.

Have assistant start engine and hold APRON CONTROL lever to UP position.

Loosen jam nut (Figure 6, item 1) on apron control pressure relief valve. Read transduc-

er T--1 hydraulic pressure on the HDC display (Figure 7, item 1). Have assistant hold

APRON CONTROL lever in UP position. Rotate valve adjustment (Figure 6, item 2)

clockwise to increase pressure, counterclockwise to decrease pressure, until hydraulic

pressure is a minimum of 3,500 psi (24,131 kPa).

Continued on page 0009 00--13.

0009 00--11/12 blank