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 180 of 790
TM 5--2350--378--24&P
0011 00--9
EJECTOR CREEPS -- Continued
0011 00
Figure 6. HDC Control Box
SOLENOID VALVE V20 TEST
Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 6, item 5)
on the HDC control box.
Start engine and leave it running.
Wait until transducer T13 hydraulic pressure on the HDC display (Figure 6, item 1) is
greater than 2,000 psi (13789.51 kPa).
Us
ingLINEUPorLINEDOWNbutton(F
igure6,item3),se
lectV12ontheHDCd
isp
lay
(Figure 6, item 2). Close V12 on the HDC display (Figure 6, item 2), by selecting the
CHANGE POSITION button (Figure 6, item 4) on the HDC control box.
Allow hydraulic pressure to stabilize for thirty seconds, then time the pressure loss for
one minute at pressure transducer T13 as indicated on HDC display (Figure 6, item 1).
If pressure loss is greater than 100 psi (690 kPa) per minute, solenoid valve V20 is
leaking.
Stop engine and relieve hydraulic pressure.
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