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 208 of 644
HYDRAULIC OIL OVERHEATS - Continued
STEP
7.
Check if control valve hose 19 or 20 is overheated.
CONDITION/INDICATION
Is control valve hose 19 OR 20 overheated?
DECISION
YES - Go to Step (13).
NO - Go to Step (8).
STEP
8.
Check if circuits 9 or 2 hoses at right or left No. 1 or No. 4 actuators are overheated.
a.
Start engine and allow to run for 5 minutes before testing for overheating.
b.
Feel circuit No. 2 line between HDC system aft manifold and No. 4 left actuator, and circuit No. 2 line
between aft manifold and No. 3 left actuator.
c.
Stop engine; relieve hydraulic pressure.
CONDITION/INDICATION
Are circuits 9 OR 2 hoses at right or left No. 1 or No. 4 actuators overheated?
DECISION
YES - Go to Step (26).
NO - Go to Step (9).
STEP
9.
Perform solenoid valve V18 check.
a.
Start engine and allow to run 5 minutes before testing for overheating.
b.
Feel circuit No. 2 line between HDC system aft manifold and No. 4 left actuator, and circuit No. 2 line
between aft manifold and No. 3 left actuator.
c.
Stop engine, relieve hydraulic pressure.
CONDITION/INDICATION
Is line to NO. 4 actuator noticeably hotter than line to NO. 3 actuator?
DECISION
YES - Replace solenoid valve V18 on HDC aft manifold (WP
0038).
NO - Verify problem with operator.
STEP
10.
Perform case drain leakage test to check for excessive internal leakage from compensating pump.
TM 5-2350-378-23&P
0015
0015-6
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