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 200 of 790

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

0012 00--13

EJECTOR DOES NOT EXTEND OR RETRACT -- Continued

0012 00

Figure 7. HDC Control Box

Figure 8. DCV Bank

LEFT AND RIGHT MAIN RELIEF VALVE PRESSURE CHECK -- CONTINUED

Disable ejector by manually closing the 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.

Start vehicle engine.

To test 13R circuit: With SPRUNG/UNSPRUNG control valve in SPRUNG mode, actu-

ate left SUSPENSION CONTROL valve to RAISE position. Read transducer T--3 hy-

draulic pressure on the HDC display (Figure 7, item 1).

To test 13L circuit: With SPRUNG/UNSPRUNG control valve in SPRUNG mode, actuate

right SUSPENSION CONTROL valve to RAISE position. Read transducer T--4 hydraulic

pressure on the HDC display (Figure 7, item 1).

Stop engine; relieve hydraulic pressure.