Parker P1/PD Series User Manual

Parker Hannin Corporation
Hydraulic Pump and Power Systems Division
Marysville, Ohio USA
Bulletin HY28-2708-02/SVC/EN | July 2019
Medium Pressure Axial Piston Pumps
P1/PD B-mod Service Information
52
Rotation Change Procedure
(Continued)
4. Next, the housing control ow set screw (#34) will need to be relocated to
the other control ow passage as shown in Figure 12. Torque the set screw
to 70 in-lbs.
5. For the 18 & 28cc pump, the control guide (#14) and bias guide (#11) are the
same, so only the locations of the control piston (#15) and bias piston (#12)
and spring (#13) need to be swapped.
6. For the 45cc units and larger, the bias guide (#11) and control guide (#14)
are different, so remove the guides, control and bias pistons, and bias spring
and swap their locations by following Steps 14-15 of the 60-140cc assembly
procedures.
NOTE: The guides are located into the port block, so it may be difcult to
remove them without damaging the port block or the guides themselves.
7. Now the pump can be reassembled per the Assembly Procedures section.
8. Test the pump per the Test Procedure section.
Figure 12 – Housing Control Flow Plug Location
Rotation Change
CW set screw locationCW set screw locationCCW set screw location

Parker P1/PD Series Specifications

General

Brand	Parker
Model	P1/PD Series
Category	Water Pump
Language	English