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 208 of 790

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

0012 00--21

EJECTOR DOES NOT EXTEND OR RETRACT -- Continued

0012 00

Figure 14. HDC Control Box

Figure 15. DCV Bank

MAIN HYDRAULIC PUMP PRESSURE TEST -- CONTINUED

Disable ejector by manually closing the ejector inhibit ball valve V23 (Figure 15, item 2)

on the DCV bank. Using LINE UP or LINE DOWN button (Figure 14, item 3), select V1

on the HDC display (Figure 14, item 2). Close V1 on the HDC display (Figure 14, item 2)

by selecting the CHANGE POSITION button (Figure 14, item 4) on the HDC control box.

Have assistant start engine and allow engine to idle (750--800 rpm). Slowly close right

main hydraulic pressure inhibit valve V21 (Figure 15, item 1), until transducer T--3

hydraulic pressure on the HDC display (Figure 14, item 1) indicates 3,950--4,050 psi

(27,235--27,925 kPa).

Fully open right main hydraulic pressure inhibit valve V21 (Figure 15, item 1) on the DCV

bank.

Stop engine; relieve hydraulic pressure.

Enable ejector by manually opening ejector inhibit ball valve V23 (Figure 15, item 2) on

the DCV bank. Using LINE UP or LINE DOWN button (Figure 14, item 3), select V1 on

the HDC display (Figure 14, item 2). Open V1 on the HDC display (Figure 14, item 2)

by selecting the CHANGE POSITION button (Figure 14, item 4) on the HDC control box.