Parker P1 Series - 018, 028, 045 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
34
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.
For rotation change or shaft conversion, disassembly should be done only as far
as necessary to complete conversion.
Disassembly and reassembly should be performed in a clean environment.
Caution: Spring assemblies in the pump are normally set under high
compression and bodily injury may occur if caution is not taken during
disassembly.
It is usually not necessary to replace spring (20) fitted in cylinder barrel. Do not
replace the spring unless absolutely necessary.
After disassembly, the internal parts should be coated with a film of clean oil and
protected from dirt and moisture.
It is recommended that the length of the protruding portion of the compensator
adjusting screws, on the control 38 be measured and noted as this information
will prove useful during assembly.
Care must be taken to avoid dropping, damaging or contaminating the machined
parts and the control valve.
For complete overhaul, all o-rings and seals should be discarded and
replaced.
1. Identify the pump from information on the data tag. Figure 1
Figure 1
018, 028, 045 Pump Maintenance
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.
For rotation change or shaft conversion, disassembly should be done only as far
as necessary to complete conversion.
Disassembly and reassembly should be performed in a clean environment.
Caution: Spring assemblies in the pump are normally set under high
compression and bodily injury may occur if caution is not taken during
disassembly.
It is usually not necessary to replace spring (20) fitted in cylinder barrel. Do not
replace the spring unless absolutely necessary.
After disassembly, the internal parts should be coated with a film of clean oil and
protected from dirt and moisture.
It is recommended that the length of the protruding portion of the compensator
adjusting screws, on the control 40 be measured and noted as this information
will prove useful during assembly.
Care must be taken to avoid dropping, damaging or contaminating the machined
parts and the control valve.
For complete overhaul, all o-rings and seals should be discarded and replaced.
1. Identify the pump from information on the data tag. Figure 1
Figure 1
PUMP DISASSEMBLY