Hydraulic connections
Figure 28. The interface of the motor
hydraulics.
Figure 29. The hydraulic connections.
All hydraulic connections of the motor are on the shaft mating surface.
• WORKING LINE PORTS (A and B)
The working lines, aka the feed and return lines of the motor are the high pressure
lines meant for running the motor.
• CASE DRAIN LINE PORT (C)
The case drain line is the return line from the housing cavity.
• PILOT LINE PORT (F or Y)
The pilot line is meant for controlling the 2-speed or freewheeling valve of the
motor (see
2-speed valve : 2N0R / 2N0L
on page 21 and
Freewheeling valve :
FW10 / FW20
on page 22).
External freewheeling valve
The external freewheeling valve is used for disengaging the motor during motion (see
Mechanical freewheeling
on page 19).
The freewheeling valve should be normally open, so that the motor will disengage
when the control system is off.
When the motor is disengaged the case drain port (C) should be connected as directly
as possible to the working line ports A and B.
There are multiple possibilities for the external freewheeling valve. Some examples of
these possibilities are described in this chapter.
4.2
4.3
System Design
Product Manual
29
