Hydraulic Motor/Pump
Series V14
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
12345678
910
11
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)
• AD (Automatic pressure compensator with
electric override and brake defeat)
• 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 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 schema-
tics.
10
