Parker P1 Series - Page 52

Parker Hannin Corporation
Hydraulic Pump and
Power Systems Division
Marysville, Ohio USA
Bulletin HY28-2665-02/SVC/EN
Medium Pressure Axial Piston Pumps
P1/PD Maintenance
52
15. If barrel hold down spring was removed during disassembly process, install
three pins to slots in barrel spline. Petroleum jelly can be used to hold pins
in place while installing remaining parts. Place barrel on xture with pin side
down. Install backup washer and hold down spring. Compress spring in
press and install snap ring.
Caution: Make sure snap ring is properly seated in the groove prior to
removing the barel from the press.
16. Apply a light lm of oil into the piston bores. Lightly lubricate the spherical
surface of the guide ball. Install the nine pistons into the bores in the hold
down plate. Install the spherical guide ball into the hold down plate. While
holding the guide ball against the hold down plate, install the pistons into the
barrel.
Chart 3
Pump
Control and Bias
Guide Torque
060
142 ± 6.5 Nm
(105 ± 5 ft-lbs)
075
142 ± 6.5 Nm
105 ± 5 ft-lbs)
100
184 ± 8 Nm
(136 ± 6 ft-lbs)
140
203 ± 8 Nm
(170 ± 6 ft-lbs)
Locating Pin
Control Piston Guide
Bias Piston Guide
Figure 4A
Port block with
Right Hand conguration
Figure 4B
Port Block with
Left Hand conguration
17. Install the locating pin on the port block face.
18. Apply Loctite Primer 7469 to the guide threads and allow to dry. Install unlu-
bricated o-rings on the control guide and bias guide. Apply Loctite 272 to the
guide threads. For right hand rotation the control guide is installed nearest
to the dowel pin (gure 4A). For left hand rotation the bias guide is installed
nearest to the dowel pin (gure 4B). Torque the control and bias guides as
specied in Chart 3
060, 075, 100, 140 Pump Maintenance
PUMP ASSEMBLY PROCEDURE
Continued