Parker Hannin Corporation
Hydraulic Pump and
Power Systems Division
Marysville, Ohio USA
Bulletin HY28-2665-02/SVC/EN
Medium Pressure Axial Piston Pumps
P1/PD Maintenance
38
018, 028, 045 Pump Maintenance
Chart 1
Rework Limits
Item Number Component 018 Part No 028 Part No 045 Part No Tolerances
13
Page 16 & 17
Bias Spring
03E-94430-0
78.3 mm
03E-94393-0
87.5 mm
03E-94356-0
116.4 mm
Free Height +/- 0.2mm
20
Page 16 & 17
Barrel Spring
787635
41.4 mm
03E-94387-0
39.5 mm
03E-94350-0
48.3 mm Free Height +/- 0.2mm
26
Page 16 & 17
Piston
789519
Max End Play
0.10 mm
Min Shoe
Flange
Thickness
2.97 mm
S2E-18415-0
Max End Play
0.07 mm
Min Shoe
Flange
Thickness
3.98 mm
S2E-184130-0
Max End Play
0.10 mm
Min Shoe
Flange
Thickness
4.98 mm
Measure OD in 3 places,
top, middle and bottom.
Measurement should
not vary by more than
0.01 mm
End Play between piston
and shoe should not
exceed value shown
23
Page 16 & 17
Barrel 03E-94717-0 03E-94375-0 03E-94338-0
Measure piston bore ID
in 3 places , top, middle,
bottom. Measurement
should not vary by more
than 0.01 mm.
Max material to be
removed by lapping is
.0051 mm
4
Page 28 & 30
P Max
Compensator
Spring-Outer
03E-93158-0
39 mm
Free Height : +/- 0.7mm
5
Page 28 & 30
P Max
Compensator
Spring- Inner
03E-93159-0
26 mm
Free Height : +/- 0.5mm
17
Page 28
Load Sense
Spring
03E-93825-0
14 mm
Free Height : +/- 0.4mm