TM 5-3805-281-24-1
Theory of Operation
PROPEL MOTOR FAST SPEED OPERATION
A VALVE
B ROTARY
PLATE
GROUP
SERVO
TO MOTOR
D PISTON
CASE DRAIN
H
CHAMBER
"A"
I
G
FROM
SPRING
J MOTOR
PORT
C LINK
F
D SERVO
SPOOL
PISTON
K
FROM PROPEL
ORIFICE
SPEED CHANGE
E
SOLENOID
VALVE
M SUPPLY OIL
L CHAMBER
N PILOT OIL
"B"
O RETURN OIL
T102855
P FAST SPEED
9025
05
88
increases rotary group turning speed that increases
In fast speed propel, the pilot oil (N) control signal from
propel speed.
the propel speed change solenoid valve (K) is higher
than spring force and spool (F) is pushed up. The oil in
NOTE: For operation of propel speed change solenoid
chamber "B" is routed to return through motor case
valve, see Proportional Solenoid Valve
drain (H). Supply oil (M) from the motor port (J) is
Operation in this group. For circuit operation,
applied to chamber "A", servo piston (D) moves down
see Propel Motor Speed Change Circuit
to reduce rotary group (B) swash angle. With reduced
Operation in this group.
swash angle the piston stroke is reduced which
CED,TX08227,3100
1922APR981/1
