TM-5-2350-378-24-P

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TM 5--2350--378--24&P

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INTRODUCTION TO TROUBLESHOOTING AND REPAIR OF THE M9 ACE HYDRAULIC

SYSTEM -- Continued

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HYDRAULIC SYSTEM -- CONTINUED

Hydraulic High--Pressure Filters

Two high--pressure filters located directly in front of the driver’s compartment, filter hydraulic fluid from the main

hydraulic pump while it is enroute to the directional control valve bank.

Hydraulic Reservoir

The hydraulic reservoir is located beneath the driver’s compartment and its check and fill point is located in the

driver’s compartment. It has a capacity of 32 gal. (121 L) of OE/HDO--10.

Direction Control Valve (DCV) Bank

The control valve bank is located beneath the hydraulic high--pressure filters. The control valves in the valve bank

are activated by mechanical linkages from the operator’s compartment and they, in turn, activate the hydraulic

functions of the vehicle.

Hydraulic Manifolds

Located in the hull, the manifolds route the flow of hydraulic fluid to the vehicle components.

Compensating Hydraulic Pump

Located on the front of the transfer case, the pump provides pressure at a constant 2,800--2,900 psi

(19,306--19,996 kPa) to the SPRUNG/UNSPRUNG hydraulic operation. Capacity of this variable displacement

pump is 10 gpm (38 Lpm).

Main Hydraulic Pump

A fixed displacement pump is mounted on the rear of the transfer case. The pump pulls fluid from the hydraulic

reservoir and circulates it through the hydraulic filters at 13 gpm (49 Lpm), then splits the pressure at the

directional control valves to provide pressure to both left and right suspension controls.

Figure 6. Bowl Area Major Components