TM-5-2350-378-23-P
ARMORED COMBAT EARTHMOVER (ACE), M9; HYDRAULIC DIAGNOSTIC CENTER
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
JUNE 2012
TM-5-2350-378-23-P - Page 97 of 644
FIELD MAINTENANCE
TROUBLESHOOTING PROCEDURES - APRON WILL NOT RAISE
INITIAL SETUP:
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
(WP
0054, Table 1, Item 7)
Parts Kit, Hydraulic (WP
0054, Table 1, Item 3)
Wood Blocks
Personnel Required
Construction Equipment Repairer, 91L (Two)
References
WP
0035
Equipment Condition
Vehicle MASTER power OFF (TM 5-2350-262-10)
Vehicle on jack stands (TM 5-2350-262-20)
TROUBLESHOOTING PROCEDURE
APRON WILL NOT RAISE
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.
NOTE
The apron cylinders receive oil flow from main control valve circuits 19 and 20. Relief valves
at port 19 and 20 of main control valve limit pressure to apron cylinders to 3,500 psi
(24,131 kPa).
TM 5-2350-378-23&P
0008
0008-1
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