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 188 of 790
TM 5--2350--378--24&P
0012 00--1
EJECTOR DOES NOT EXTEND OR RETRACT
0012 00
INITIAL SETUP:
Tools and Special Tools
General Mechanic’s Tool Kit (WP 0071 00, item 7)
Personnel Required
Two 62B10
References
TM 5--2350--262--20--2
WP 0035 00
Equipment Conditions
Vehicle MASTER power OFF (TM 5--2350--262--10)
Vehicle on jack stands (TM 5--2350--262--20--1)
Ejector circuit oil is supplied by main pump outputs 13L and 13R. Oil enters main control valve through inlet ports
13L and 13R and combines at the ejector control valve section. When ejector control valve is shifted to the BACK
position, oil is supplied from port 22 and fed to rod end of ejector cylinder, which causes cylinder rod to retract,
pulling ejector back in bowl. When ejector control valve is shifted to FORWARD position, oil is supplied from port
21 and fed to the ejector head end, causing cylinder rod to extend, pushing ejector forward in bowl. Pressure in
ejector circuit is limited by main relief valves 13L and 13R to 3,950--4,050 psi (27,235--27,925 kPa) and circuit
relieve valve 21, which limits pressure to extend the ejector cylinder.
WARNING
S
High oil pressure is present in the M9 hydraulic system. Do not disconnect any hy-
draulic system component unless hydraulic system pressure has been relieved.
After hydraulic system pressure has been relieved, wait at least 4 minutes before
disconnecting any hose or fitting. Ensure each of the hydraulic control levers is
moved several times through all positions and the hydraulic tank dipstick is slowly
loosened to relieve pressure. Failure to comply may result in severe injury or death
to personnel.
S
Transmission shifting lines are pressurized. Do not disconnect lines, fittings, or
accumulator unless transmission shift control valve pressure has been relieved.
Discharge transmission shift accumulator by moving shift control lever through all
forward and reverse ranges several times, with engine off. Failure to comply may
result in severe injury to personnel.
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