TM 5-3895-382-24Leveling Blade Control ValveLeveling Blade Control Valve.(1) Detent ball and spring. (2) Centering spring. (3) Passage to piston end of cylinder. (4) Outlet passage. (5) Passage to head end of cylinder. (6)Spool. (7) Valve body. (8) Inlet passage. (9) Relief valve.The control valve is a four-way, four-position, open centerdirectional valve. The control valve allows oil to flow to theblade cylinder as directed by the blade control lever.The operator sets the position of the control valve by movingthe blade control lever at the operators console. The fourpositions are RAISE, HOLD, LOWER and FLOAT.Spool (6) is held in the HOLD position by centering spring (2).The control valve contains detent ball and spring (1) whichholds spool (6) in place when the control valve is set in theFLOAT position.Relief valve (9) is located in the valve body (7). The reliefvalve is screw adjustable to limit maximum pressure to10 330 ± 345 kPa (1500 ± 50 psi).Oil from the steering priority valve enters valve body (7) at inletpassage (8). Passages (3) and (5) are connected to the bladecylinder. Return oil flows through outlet passage (4) to thehydraulic oil filter and second brake valve.15-6
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