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 159 of 319

TM 5-2320-262-20-3

3-124

5

6

7

8

9

10

11

12

13

1

2

3

4

HIGH-PRESSURE

CIRCUIT

RETURN

SUPPLY

In SPRUNG mode, hydraulic pressure is delivered to front actuator through line 9.

In UNSPRUNG mode,

hydraulic pressure to raise front corner of vehicle is delivered through line 3.

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

9

FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE IN SPRUNG OR UNSPRUNG MODE

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