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 TM 9-2350-238-20-1
F-25. SPADE HYDRAULIC SUBSYSTEM.
Functional Description.
a. The hydraulic fluid power for the
protect the subsystem when external
operation of the spade (spade cylinders) is
forces on the spade create excessive pres-
sure, Pressure over 2100 psi (14,480 kPa)
supplied by the 8 gpm pump of the hydrau-
is relieved to the other side of the hydraulic
lic power subsystem. The spade hydraulic
subsystem controls the power for raising or
cylinders (1). Moving the handle of the
lowering the spade.
directional control valve (6) in the RAISE
position has the same effect as in the
LOWER position except that the hydraulic
b. Moving the handle of the directional
fluid is routed to extend the hydraulic
control valve (6) in the LOWER position
directs hydraulic fluid to retract hydraulic
cylinder (1), raising the spade.
cylinders (1). The relief valves (2 and 5)
F-47
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