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 TM 55-1905-220-14-7
3-208. DIRECTIONAL CONTROL VALVE - MAINTENANCE INSTRUCTIONS
(Continued)
(3)
Valve Spools
Each spool is constructed for a specific valve application and is dynamically and hydrostatically
balanced to prevent pressure forces from moving the spool within the bore. The spool used is a four-way type.
(4)
Methods of Control
SOLENOID - Push type solenoids are used to control movement of the spool. A manual plunger
is available in each solenoid to check spool movement during test. Push type solenoids move the spool away
from the solenoid when energized.
CAUTION
When a valve uses two solenoids, only one solenoid should be
energized at a time or damage may result.
3-3222
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