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

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
46
PUMP DISASSEMBLY NOTES
1. Identify the pump from information on the data tag. Figure 1
2. Drain uid from housing. Fluid drained from pump should be disposed of
properly.
3. Mount pump in xture to prevent movement while removing main housing
bolts
4. Remove bolts holding the compensator assembly on the pump housing.
Additional uid may drain out of the passages when the compensator is
removed. Set compensator aside for later disassembly and inspection
5. Remove the bolts attaching the port block to the main housing.
Figure 1 Pump Data Tag
A. Pump disassembly for inspection should be limited to the following cases:
a) Malfunction or oil leakage resulting from damage or wear and tear.
b) Trouble-shooting procedures previously listed do not solve the problem.
Caution: Spring assemblies in the pump are normally set under high
compression and bodily injury may occur if caution is not taken during
disassembly.
B. For rotation change or shaft conversion, disassembly should be done only as
far as necessary to complete conversion.
C. Disassembly and reassembly should be performed in a clean environment.
D. It is usually not necessary to replace spring (20) tted in cylinder barrel. Do
not replace the spring unless absolutely necessary.
E. After disassembly, the internal parts should be coated with a lm of clean oil
and protected from dirt and moisture.
F. It is recommended that the length of the protruding portion of the compensa-
tor adjusting screws, be measured and noted, as this information will prove
useful during assembly.
G. Care must be taken to avoid dropping, damaging or contaminating the ma-
chined parts and the control valve.
H. For complete overhaul, all o-rings and seals should be discarded and re-
placed.
060, 075, 100, 140 Pump Maintenance
PUMP DISASSEMBLY PROCEDURE