TM-9-2350-238-20-1

HULL AND RELATED COMPONENTS RECOVERY VEHICLE, FULL TRACKED: LIGHT, ARMORED, M578

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL

MAY 1994

TM-9-2350-238-20-1 - Page 1311 of 1364

TM 9-2350-238-20-1

F-25. SPADE HYDRAULIC SUBSYSTEM.

Functional Description.

a.

The hydraulic fluid power for the

operation of the spade (spade cylinders) is

supplied by the 8 gpm pump of the hydrau-

lic power subsystem. The spade hydraulic

subsystem controls the power for raising or

lowering the spade.

b.

Moving the handle of the directional

control valve (6) in the LOWER position

directs hydraulic fluid to retract hydraulic

cylinders (1). The relief valves (2 and 5)

protect the subsystem when external

forces on the spade create excessive pres-

sure, Pressure over 2100 psi (14,480 kPa)

is relieved to the other side of the hydraulic

cylinders (1). Moving the handle of the

directional control valve (6) in the RAISE

position has the same effect as in the

LOWER position except that the hydraulic

fluid is routed to extend the hydraulic

cylinder (1), raising the spade.

F-47