TM-5-2350-262-20-3
ARMORED COMBAT EARTHMOVER (ACE), M9
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL; VOLUME 3 OF 3; HYDRAULIC TROUBLESHOOTING TEST PROCEDURES
TM-5-2350-262-20-3 - Page 184 of 319
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TM-5-2350-262-20-3
APRON CONTROL VALVE
EJECTOR CONTROL VALVE
EJECTOR CYLINDER INTERNAL LEAKAGE TEST
NOTE
Have suitable container ready to catch oil.
•
Remove pressure measuring device (1) from elbow (2) on port 21 of ejector control valve.
Cap port 21.
•
Start engine and have assistant hold EJECTOR CONTROL lever in the BACK position for
one minute.
Mark position of ejector at side of hull and continue to hold valve lever in the
BACK position for one more minute.
Check position of ejector while still holding valve
lever in the BACK position.
If ejector has moved more than 1/2 in (12 mm), the ejector
cylinder is leaking excessively.
APRON RELIEF VALVE PRESSURE TEST
WARNING
Before performing any hydraulic troubleshooting in bowl, move
ejector forward and engage the ejector lock.
Failure to comply may
result in severe injury or death to personnel.
NOTE
Have suitable container ready to catch oil.
•
Move ejector forward, engage ejector lock, stop engine, and relieve hydraulic pressure.
•
Disconnect CONT VLV-19 hose (1) from elbow (2) at port 19 of apron control valve.
Connect pressure measuring device (3) to elbow (2).
Plug hose (1).
•
Have assistant start engine and hold APRON CONTROL lever in UP position.
Read
pressure measuring device (3).
If pressure is low, adjust apron raise relief valve.
APRON RELIEF VALVE ADJUSTMENT
•
As assistant holds APRON CONTROL lever in UP position, loosen jamnut (4), and rotate
adjusting screw (5) clockwise to increase pressure; counterclockwise to decrease
pressure.
•
Tighten jamnut (4).
Stop engine; relieve hydraulic pressure.
Refer to TM 5-2350-262-20-2.
Refer to TM 5-2350-262-20-2.
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