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 265 of 319

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Track adjustment is provided by hydraulic pressure from the compensating pump and controlled by

electric current tapped at the UNSPRUNG switch.

In the SPRUNG or UNSPRUNG mode, hydraulic pressure is

delivered to the track adjuster manifold from line nine (9) and returned through line seven (7) at the left manifold.

WARNING

High pressure is present in the M9 hydraulic system.

Do not disconnect any hydraulic

system component unless hydraulic system pressure has been relieved.

Ensure each

hydraulic control lever is moved several times through all positions and hydraulic tank

dipstick is slowly loosened to relieve pressure.

Failure to comply may result in severe

injury or death to personnel.

NOTE

Use these procedures to troubleshoot either left or right track adjuster cylinder.

The

hydraulic valves are equipped with manual operators which can be used to check the

hydraulic portion of the system.

If everything functions by the manual hydraulic

operators, the problem will be in the electric circuit (refer to TM 5-2350-262-20-1).

HIGH-PRESSURE

CIRCUIT

RETURN

SUPPLY

COMPONENTS:

1.

COMPENSATING PUMP

2.

HIGH-PRESSURE FILTER

3.

MAIN ACCUMULATOR

4.

RETURN LINE FILTER

5.

DIRECTIONAL CONTROL

VALVE BANK

6.

HYDRAULIC RESERVOIR

7.

MANIFOLD, LEFT HAND

8.

TRACK ADJUSTING MANIFOLD

ASSEMBLY

9.

TRACK ADJUSTING CYLINDERS

18

TRACK (LEFT OR RIGHT) WILL NOT TIGHTEN OR LOOSEN, SEMI-AUTOMATIC

TRACK

ADJUSTER (NEW PRODUCTION)

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TM 5-2350-262-20-3