MWO-5-2350-262-35-4

ARMORED COMBAT EARTHMOVER (ACE), M9

MODIFICATION WORK ORDER

MWO-5-2350-262-35-4

  MWO-5-2350-262-35-4 - Page 170 of 207

MWO 5--2350--262--35--4
A--5
APPENDIX A
M9 ACE HDC
MWO CHECK--OUT PROCEDURE -- CONTINUED
d)
Have the vehicle operator move the right SUSPENSION CONTROL lever to LOWER. Verify that the
right suspension does NOT lower, and that Transducer T1 reads greater than 3500 psi. (This indicates
that valve V5 has redirected flow from the suspension to transducer T1, which will now read the value of
the system relief valves.)
12. Valve V9 and V10 check:
a)
Push the RESET VALVES button on the control box, and verify all the valves are set to the power OFF
setting and are in the default position. Reference Table A--1.
b)
Have the vehicle operator place the vehicle in SPRUNG mode.
c)
Verify that the bump stops are extended.
d)
Use the LINE UP and LINE DOWN buttons to select valve V9. Press CHANGE POSITION to close
valve V9.
e)
Use the LINE UP and LINE DOWN buttons to select valve V10. Press CHANGE POSITION to close
valve V10.
f)
Have the vehicle operator place the vehicle in the UNSPRUNG mode.
g)
Verify that the bump stops are still extended. (This indicates that V9 and V10 are closed, preventing
operation of the bump stops.)
h)
Push the RESET VALVES button on the control box, and verify all the valves are set to the power OFF
setting and are in the default position. Reference Table A--1.
i)
Verify that the bump stops are now retracted. (This verifies that V9 and V10 have opened.)
13. Valve V11 check:
a)
Push the RESET VALVES button on the control box, and verify all the valves are set to the power OFF
setting and are in the default position. Reference Table A--1.
b)
Have the vehicle operator place the vehicle in SPRUNG mode.
c)
Use the LINE UP and LINE DOWN buttons to select valve V11. Press CHANGE POSITION to close
valve V11.
d)
Verify that transducer T1 reads less than 500 psig.
e)
Have the vehicle operator place the vehicle in UNSPRUNG mode.
f)
Have the vehicle operator move the left SUSPENSION CONTROL lever to LOWER.
g)
Verify that transducer T1 reads greater than 3000 psig. (This indicates that V11 has directed flow from
the suspension to transducer T1, which now reads the system relief valve pressure setting.)
14. Reserved


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