TM 5-3805-281-24-1
Theory of Operation
SWING MOTOR PARK BRAKE RELEASE VALVE OPERATION
SPRING A
PISTON B
ORIFICE AND C
CHECK VALVE
FROM
D
VALVE
MANIFOLD
()
FROM CONTROL
PARK BRAKE
F RELEASE
VALVE DIG
PILOT PRESSURE E
VALVE SPOOL
SIGNAL PASSAGE
9025
05
PISTON
DIG PILOT
C ORIFICE AND
80
PRESSURE E
B
CHECK VALVE
SIGNAL
PILOT
PASSAGE
PUMP
H
OFF
D SOLENOID
VALVE
MANIFOLD
G
F
SWING
PARK BRAKE
H
I PILOT OIL
MOTOR
RELEASE
VALVE
VALVE SPOOL
SPOOL
J RETURN OIL
T109245
K SWING MOTOR PARK BRAKE RELEASED
Continued on next page
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1904JUN981/4