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 145 of 319

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TM 5-2350-262-20-3

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COMPONENTS:

1. BUMP STOP CYLINDER

2. NO. 1 ACTUATOR, RIGHT HAND

3. NO. 2 ACTUATOR, RIGHT HAND

4. MAIN HYDRAULIC PUMP

5. RETURN LINE FILTER

6. MAIN ACCUMULATOR

7. HIGH-PRESSURE FILTERS

8. DIRECTIONAL CONTROL

VALVE BANK

9. SPRUNG/UNSPRUNG VALVE

10. HYDRAULIC RESERVOIR

11. COMPENSATING PUMP

12. MAIN MANIFOLD, RIGHT HAND

13. CHECK VALVE

SPRUNG mode provides for a smooth ride up to 30 mph (48 km/h) and is used for over the road marches and

parking of the vehicle.

Hydraulic pressure is supplied to front actuators through line 9.

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 front of vehicle.

FRONT SUSPENSION RAISE/LOWER CIRCUIT

HIGH-PRESSURE

CIRCUIT

RETURN

SUPPLY

8

FRONT CORNER (LEFT OR RIGHT) RAISES IN UNSPRUNG, BUT NOT SPRUNG MODE