MWO-5-2350-262-35-4

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

A--1

APPENDIX A

M9 ACE HDC

MWO CHECK--OUT PROCEDURE

PURPOSE:

The purpose of the M9 ACE HDC MWO Check--out Procedure is to ensure that the installation of the HDC has

been completed correctly, and that the vehicle and the HDC function properly.

ASSUMPTIONS:

1. Vehicle relief valve settings have previously been adjusted in accordance with TM--5--2350--262--20--3, using a

GS--5 pressure gage, with a tolerance of +/-- 100 psi.

2. The accuracy of the HDC is +/-- 100 psi.

3. During the Product Acceptance Testing, values within +/-- 200 psi are considered within specification.

4. Other vehicle operational characteristics meet the specifications of TM--5--2350--262--20--3.

PROCEDURE:

The tests shall be conducted in accordance with this procedure. The HDC system is considered fully operational

when it has passed all of the tests.

WARNING

Before performing any troubleshooting in bowl, move the ejector forward and disconnect

the ejector cylinder from the hydraulic system by pulling the handle down on ball valve

V23, located in the rear of the bowl area, just below the main control valve bank. Failure

to comply may result in severe injury or death to personnel.

1. Exercise vehicle functions:

a) Confirm that the three HDC manual valves are in the OPEN position. (Handles must be vertical.)

b) Start engine.

c) Vehicle must rise up and level out normally when the engine is started.

d) Confirm that ejector extends and retracts.

e) Confirm that apron moves up and down.

Confirm that left suspension moves up and down.

g) Confirm that right suspension moves up and down.

h) Confirm that the left and right bump stops extend when the vehicle is placed in SPRUNG mode, and

retract when the vehicle is placed in UNSPRUNG mode.

Confirm that winch pays out and pays in.

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