TM 5-2350-378-23&P
FIELD MAINTENANCE
TROUBLESHOOTING PROCEDURES - EJECTOR DOES NOT EXTEND OR RETRACT
INITIAL SETUP:
Tools and Special Tools
Equipment Condition
Tool Kit, General Mechanic's: Automotive
Vehicle MASTER power OFF (TM 5-2350-262-10)
Vehicle on jack stands (TM 5-2350-262-20)
(WP 0054, Table 1, Item 7)
Personnel Required
Construction Equipment Repairer, 91L (Two)
References
TM 5-2350-262-20
TROUBLESHOOTING PROCEDURE
EJECTOR DOES NOT EXTEND OR RETRACT
WARNING
High oil pressure is present in the M9 ACE hydraulic system. Do not disconnect any
hydraulic system component unless hydraulic system pressure has been relieved. After
hydraulic system has been relieved, wait at least four 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.
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.
NOTE
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 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 bow. When
ejector control valve is shifted to FORWARD position, oil is supplied from port 21 and fed to
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 ejector
cylinder.
0011-1
03/15/2011Rel(1.8)root(tswp)wpno(T00009)
