TROUBLESHOOTING PROCEDURES - FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE IN SPRUNG
OR UNSPRUNG MODE
Tools and Special Tools
Vehicle MASTER power OFF (TM 5-2350-262-10)
Tool Kit, General Mechanic's: Automotive
Vehicle on jack stands (TM 5-2350-262-20)
Parts Kit, Hydraulic (WP 0054, Table 1, Item 3)
Construction Equipment Repairer, 91L (Two)
FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE IN SPRUNG OR UNSPRUNG MODE
· 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.
· In SPRUNG mode, hydraulic pressure is delivered to front actuator through line 9. In
UNSPRUNG mode, hydraulic pressure to raise front corner of vehicle is delivered through
· Use these procedures to troubleshoot either left or right front of vehicle.