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 116 of 790

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

0007 00--23

ALL HYDRAULIC FUNCTIONS INOPERATIVE -- Continued

0007 00

Figure 18. HDC Control Box

Figure 19. DCV Bank

Figure 20. Main Pump Relief Valve 13L

13L MAIN PUMP RELIEF VALVE ADJUSTMENT -- CONTINUED

Loosen jam nut (Figure 20, item 2). Read transducer T--4 hydraulic pressure on the

HDC display (Figure 18, item 1). As assistant moves left--hand SUSPENSION

CONTROL lever to RAISE and EJECTOR CONTROL lever to BACK. Rotate valve

(Figure 20, item 1) clockwise to increase pressure; counterclockwise to decrease

pressure.

When transducer T--4 pressure indicates 3,950--4,050 psi (27,235--27,925 kPa), tighten

jam nut (Figure 20, item 2).

Verify pressure is now within limits by having assistant move left--hand SUSPENSION

CONTROL lever to RAISE and hold EJECTOR CONTROL lever to BACK. Read

transducer T--4 hydraulic pressure on the HDC display (Figure 18, item 11).

Stop engine; relieve hydraulic pressure.

Manually open ejector inhibit ball valve V23 (Figure 19, item 1) on the DCV bank. Using

LINE UP or LINE DOWN button (Figure 18, item 13), select V1 on the HDC display

(Figure 18, item 12). Open V1 on the HDC display (Figure 18, item 12) by selecting the

CHANGE POSITION button (Figure 18, item 14) on the HDC control box.