Parker P1 Series - 060, 075, 100, 140 Assembly

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
50
For major overhauls, all plugs should be removed, and the seals replaced. Prior to
assembly, all parts should be thoroughly cleaned. Assembly should be performed
in a clean work environment.
Do not use bearing grease during installation. Grease does not dissolve in hy-
draulic oil and may plug orices or lters in the system. Clean petroleum jelly is
preferred to lubricate o-rings and seals, and to adhere parts for assembly.
NOTE: For fluids other than petroleum based hydraulic oil, insure that pe-
troleum jelly is compatible with the fluid. If not compatible, another product
should be used instead.
Inspect all bearing surfaces and seal areas to insure that they are free from nicks,
dings, scratches, and rust.
1. Using installation tool T2, press the front bearing cup into the bottom of the
housing. Make sure the cup is seated rmly against the bottom of the hous-
ing.
2. Turn housing over. Using installation tool T1, press the shaft seal in the seal
bore. Install the snap ring into the groove in the seal housing bore.
3. Using installation tool T5, press the rear bearing cup into the port block.
Insure that the cup is seated rmly against the bottom of the housing.
4. Install the front bearing cone and shaft into the housing.
5. Install the rear bearing cone on the shaft.
6. Install the port block onto the housing using housing bolts and tighten to 27
± 1.3 Nm (20 ± 1 ft. lb.).
7. Position the pump so shaft end is up.
8. Lay a parallel bar on the pump pilot.
9. Press down on the shaft and rotate it 3-5 times then measure the height of
the shaft end to the parallel bar using dial calipers or a dial indicator.
10. Grasp the shaft and pull it up and rotate it 3-5 times. Measure the height of
the shaft end to the parallel bar. Note: if the shaft slips or falls, the steps must
be repeated to get an accurate measurement. Figure 3
11. Subtract the larger from the smaller to get the differential gap.
12. Repeat the procedure three times. Once recorded, take the average of the
three measurements.
13. With the average, use chart 2 to determine the correct shim to install in the
pump.
14. Rebuild the pump with the shaft bearings, and selected shim. Check end
play, then disassemble port block and continue with pump assembly.
060, 075, 100, 140 Pump Maintenance
PUMP ASSEMBLY PROCEDURE