Hydraulic Motor/Pump
Series V14
EP control function
(solenoid current increasing)
Refer to the illustration below left:
At an increasing current (above the threshold
value), the solenoid spool pushes left on the
servo valve spool, and flow is directed to the
left hand setting chamber - the setting spool
moves to the right and the displacement
decreases.
This means, that the shaft speed increases
while the output torque decreases correspon-
dingly (at a constant pump flow and system
pressure).
HP control function
(decreasing pilot pressure)
Refer to the illustration below right:
When the pilot pressure decreases, the pilot
piston retracts, the servo valve spool moves
to the right and flow is directed to the right
hand setting chamber - the setting spool
moves to the left and the displacement
increases.
The shaft speed now decreases and the
available output torque increases corres-
pondingly (at a constant pump flow and
system pressure).
6,5
35
Max
Min
E
D
C
A
B
Solenoid
E
D
C
6,5
35
Max
Min
A
B
Pilot
port X5
EP control function (displ. decrease at increasing
current).
HP control function (displ. increase at decreasing
pilot pressure).
EO/EP/HO/HP port and restrictor
locations
Port connections and restrictor
positions
(EP control)
A.
Port A connection
B.
Port B connection
C.
Restrictor position, max-to-min
servo pressure
D.
Restrictor position, min-to-max
servo pressure
E.
Restrictor location, servo supply
(refer to cross section page 12)
A
B
O-ring groove
C
D
Facing motor housing
A
D
C
B
O-ring
Facing motor
14
