Service/Spare Parts Manual
Series V14
MSG30-5510-M1/UK
11
Parker Hannifin
Pump & Motor Division Europe
Trollhättan, Sweden
Parker Hannifin
Pump & Motor Division Europe
Trollhättan, Sweden
Controls and gauge ports
AC control function
Refer to the illustration below left:
When pressure in port A (or B) increases, the servo val-
ve spool is pushed to the right, directing flow to the right
hand setting chamber - the setting spool moves to the
left; displacement and output torque increases. At the
same time, the shaft speed decreases correspondingly
(at a constant pump flow to the motor).
Refer to the illustration below right:
When pressure in port A (or B) decreases, the servo val-
ve spool moves to the left, directing flow to the left hand
setting chamber - the setting spool moves to the right;
displacement and output torque decreases.
At the same time, the shaft speed increasescorrespon-
dingly (at a constant pump flow tothe motor).
11
Parker Hannifin
Pump and Motor Division
Trollhättan, Sweden
Service Manual
Series V14
Bulletin HY30-5510-M1/UK
AC control function
Refer to the illustration below left:
When pressure in port A (or B) increases,
the servo valve spool is pushed to the
right, directing flow to the right hand setting
chamber - the setting spool moves to the
left; displacement and output torque in-
creases. At the same time, the shaft speed
decreases correspondingly (at a constant
pump flow to the motor).
Refer to the illustration below right:
When pressure in port A (or B) decreases,
the servo valve spool moves to the left, di-
recting flow to the left hand setting chamber
- the setting spool moves to the right; dis-
placement and output torque decreases.
At the same time, the shaft speed increases
correspondingly (at a constant pump flow to
the motor).
AC control function (displ. increase at increasing
pressure).
AC control function (displ. decrease at decreasing
pressure).
V14_AC_function_1.eps ny
Leif A./01-04-03
6,5
35
Max
A
B
E
D
C
Min
V14_AC_function_2.eps ny
Leif A./01-04-003
6,5
35
Max
Min
A
B
E
D
C
V14_AC_module.eps
Leif A./01-03-12
A
B
C
D
O-ring groove
Facing motor housing
A
B
C
D
O-ring
Facing motor
AC port and restrictor locations
Port connections and restrictor posi-
tions
(AC control)
A.
Port A connection
B.
Port B connection
C.
Restrictor position, min-to-max
servo pressure (M5)
D.
Restrictor location, max-to-min
servo pressure (M5)
E.
Restrictor location, servo supply
(refer to cross section page 10)
AC control function (displ. increase at increasing
pressure).
AC control function (displ. decrease at decreasing
pressure).
AC port and restrictor locations
Port connections and restrictor
positions ’(AC control)
A.
Port A connection
B.
Port B connection
C.
Restrictor position, min-to-max
servo pressure (M5)
D.
Restrictor location, max-to-min
servo pressure (M5)
E.
Restrictor location, servo supply
(refer to cross section page 10)
Facing motor
O-ring
B
A
C
D
