TM 5-3805-280-24-1
Theory of Operation
PROPORTIONAL SOLENOID VALVE OPERATION
SOLENOID
A
VALVE MANIFOLD
ARM
REGENERATIVE
B
SPEED SENSING
C
I
L
J
PROPEL SPEED CHANGE
POWER
D
E
F
BOOST
SPOOL
F
M
K
ADJUSTING
SCREW
J
L
9025
M
05
DE-ENERGIZED
G
I
28
SOLENOID
I
PRESSURE EQUALS
L
H
J
MAGNETIC FORCE
F
M
K
L
TO VALVE
PILOT OIL
O
PILOT OIL FROM
FUNCTION
J
M
PILOT SHUT-OFF
TO
VALVE
REDUCED PILOT
P
HYDRAULIC
OIL
OIL TANK
ENERGIZED
RETURN OIL
N
Q
T109046
PROPORTIONAL SOLENOID VALVE
R
Continued on next page
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