TM 5-3895-383-24
Pump Control
SMCS Code: 5653
Solenoid Valve
Illustration 24
Servo
(1) Springs. (2) Solenoid. (3) Valve spool. (4) Solenoid.
The control valve is attached to the vibratory pump. The valve
is a three-position solenoid. The valve is a four-way directional
control valve. The solenoid control valve directs oil to the
servo circuit of the vibratory pump.
When current is supplied to either solenoid (2) or (4), the
solenoid moves the valve spool (3). The controlled oil passes
across the valve spool (3). The oil exits the passage to the
hydraulic servo.
When the vibratory circuit is not activated, current flow to the
solenoid (2) or (4) is interrupted. The force of the springs (1)
moves the valve spool (3) to the center position. The force of
each spring (1) is identical. The springs (1) balance each
other. The springs also maintain the center position of the
valve spool (3).
11-28
