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 213 of 319

TM 5-2350-262-20-3

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The rear of vehicle is raised by left and right actuators, interconnected by hydraulic circuit 8.

The SPRUNG and

UNSPRUNG circuits operate left and right rear actuators through valves and mechanical controls.

Circuit 9

operates SPRUNG mode and circuit 11 operates UNSPRUNG mode.

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.

SUSPENSION CIRCUIT

12

REAR OF VEHICLE RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE

HIGH-PRESSURE

CIRCUIT

RETURN

SUPPLY

COMPONENTS:

1. RETURN LINE FILTER

2. MAIN ACCUMULATOR

3. HIGH-PRESSURE FILTERS

4. DIRECTIONAL CONTROL VALVE

BANK

5. SPRUNG/UNSPRUNG VALVE

6. NO. 4 ACTUATOR, LEFT HAND

7. HYDRAULIC RESERVOIR

8. NO. 3 ACTUATOR, LEFT HAND

9. NO. 2 ACTUATOR, LEFT HAND

10. NO. 1 ACTUATOR, LEFT HAND

11. BUMP STOP CYLINDERS

12. COMPENSATING PUMP

13. CHECK VALVE

14. NO. 1 ACTUATOR, RIGHT HAND

15. NO. 2 ACTUATOR, RIGHT HAND

16. NO. 3 ACTUATOR, RIGHT HAND

17. MAIN HYDRAULIC PUMP

18. NO. 4 ACTUATOR, RIGHT HAND