MWO-5-2350-262-35-4

ARMORED COMBAT EARTHMOVER (ACE), M9

MODIFICATION WORK ORDER

MWO-5-2350-262-35-4 - Page 174 of 207

MWO 5--2350--262--35--4

APPENDIX A

M9 ACE HDC

MWO CHECK--OUT PROCEDURE -- CONTINUED

4.

Valves V1 though V20 can be opened and closed by using the LINE UP and LINE DOWN buttons to

select a valve, and then pressing the CHANGE POSITION button to open or close the valve. The

control box software allows up to four of the solenoid valves (V1--V20) may be powered ON at one time.

Pressing the RESET VALVES button returns all valves to their normal vehicle operating position (power

OFF).

5.

Valves V21 and V22 are manually operated, and are located in the bowl area, near the high pressure

filters. They can be operated from outside the bowl, while standing on top of the vehicle.

6.

Valve V23 is manually operated, and is located in the bowl area, on the front of the directional control

valve bank. It is operated while standing in the bowl. This valve is used to interrupt flow to the ejector.

It

is recommended that the engine be shut down when operating valve V23, for safety purposes.

7.

The troubleshooting instructions listed in TM 5--2350--378--24&P show how to use the HDC system to

troubleshoot the M9 ACE vehicle hydraulic system in those M9 ACE vehicles equipped with the HDC

system.

WARNING

Do not perform MWO check out procedure of the V23 valve manually unless the engine

is shut off. If the engine is running and not shut off, failure may result in serious injury or

death to personnel in the bowl.

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