TM 5-3805-280-24-1
Theory of Operation
PROPORTIONAL SOLENOID VALVE MANIFOLD OPERATION
E TO SWING MOTOR PARK
BRAKE RELEASE VALVE
FROM PILOT D
SHUT-OFF VALVE
F TO REAR PUMP CONTROL
VALVE
G TO HYDRAULIC
FROM PROPEL
OIL TANK
FLOW CONTROL C
VALVE
H TO SYSTEM RELIEF
VALVE POWER
TO FRONT PUMP
BOOST PORT
CONTROL VALVE
B
P POWER BOOST
O PROPEL SPEED CHANGE
TO PROPEL
I MOTOR SPEED
CHANGE VALVE
K FROM BUCKET FLOW
CONTROL VALVE
TO ARM
J TO PUMP REGULATORS
REGENERATIVE L
9025
SPEED SENSING PORT
05
VALVE
M
ARM
26
N
FROM PILOT
SHUT-OFF A
REGENERATIVE
SPEED
VALVE
SENSING
E
H
L
F
B
I
J
PH
PI
PG
PE
SD
SC
SI
SG
N
M
O
P
PD
A
G
PE
D
DP
DE
DD
DS
Q PILOT OIL
C
K
R RETURN OR
PRESSURE
S SOLENOID VALVE MANIFOLD
FREE OIL
T109045
Continued on next page
TX,9025,GG2609
1920MAY981/2
6-25
