Service/Spare Parts Manual
Series V14
MSG30-5510-M1/UK
10
Parker Hannifin
Pump & Motor Division Europe
Trollhättan, Sweden
Controls and gauge ports
Controls
The following controls satisfy most application require-
ments:
• AC (automatic pressure compensator)
• AH (automatic pressure compensator with hydraulic
override)
• EO and HO (two position controls)
• EP and HP (proportional controls)
All controls utilize a servo piston that connects to the
valve segment (refer to the illustration on page 4).
The built-in four-way servo valve determinesthe posi-
tion of the servo piston and, in turn,the displacement.
The displacement angle (between output shaft and cy-
linder barrel) ranges from 35° (max) to 6.5° (min).
Servo supply pressure is obtained from the pressuri-
zed, main port through the corres-ponding, built-in
shuttle valve.
The respons time (i.e. from max-to-min or from min-to-
max displacement) is determined by restrictors in the
servo valve supply and return lines; refer to the sche-
matics.
10
Parker Hannifin
Pump and Motor Division
Trollhättan, Sweden
Service Manual
Series V14
Bulletin HY30-5510-M1/UK
Controls
- general information
AC control description
1.
AC control cover
2.
Servo valve spool
3.
Modulating spring
4.
Threshold spring
5.
Feedback arm
6.
Threshold adjustment screw
7.
Seal nut
8*.
Two-part threshold seal
9.
End cover (max displ.)
10.
Control module housing
11.
Max displ. limiting screw/bushing
12.
Set screws
13.
Connecting arm
14.
Setting piston
15.
Min displ. limiting screw/bushing
16.
End cover (min displ.)
E.
Restrictor location, servo supply
V14_AC_section.eps
Leif A./01-03-12
123456
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910
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12
13
14
15
16
E
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
E
AC control module cross section (as seen from motor
intermediate housing / control module interface).
The following controls satisfy most application
requirements:
• AC (automatic pressure compensator)
• AH (automatic pressure compensator with
hydraulic override)
• EO and HO (two position controls)
• EP and HP (proportional controls)
All controls utilize a servo piston that con-
nects to the valve segment (refer to the illus-
tration on page 4).
The built-in four-way servo valve determines
the position of the servo piston and, in turn,
the displacement.
The displacement angle (between output
shaft and cylinder barrel) ranges from 35°
(max) to 6.5° (min).
Servo supply pressure is obtained from the
pressurized, main port through the corres-
ponding, built-in shuttle valve.
The respons time (i.e. from max-to-min or
from min-to-max displacement) is determined
by restrictors in the servo valve supply and
return lines; refer to the schematics.
*
Yellow seal cap is factory mounted. Red seal cap is available as spare part, part no. 3797065.
AC control description
1.
AC control cover
2.
Servo valve spool
3.
Modulating spring
4.
Threshold spring
5.
Feedback arm
6.
Threshold adjustment screw
7.
Seal nut
8*. Two-part threshold seal
9.
End cover (max displ.)
10. Control module housing
AC control module cross section (as seen from motor intermediate
housing / control module interface).
*Yellow seal cap is factory mounted. Red seal cap is
available as spare part, part no. 3797065.
11. Max displ. limiting screw/bushing
12. Set screws
13. Connecting arm
14. Setting piston
15. Min displ. limiting screw/bushing
16. End cover (min displ.)
E.
Restrictor location, servo supply
