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20
THE OILGEAR COMPANY
Bulletin 947070-B
ROTATING GROUP
The rotating group may be heavy. Be
careful not to damage cylinder wear
surface which mates against the valve
plate, bearing diameters or piston shoes.
Use proper lifting techniques and
assistance from others to prevent
personal injury.
1. Remove O-rings (13 and 14) from the pump
housing (1). Do not remove roll pins (12) unless
they are damaged.
2. Remove the rotating group by turning the
driveshaft (21) slowly, while pulling the cylinder
barrel (38) from the housing.
3.
Identify (number) each pump piston shoe
assembly (39) and its respective bore in the
cylinder barrel (38) and shoe retainer plate (40)
for easy reassembly.
4. See Figure 9. Lift out shoe retainer (40) with
pistons (39) and remove the fulcrum ball (41)
and shoe retainer spring (42).
Figure 9. Rotating Group Disassembly
-011/-014/-022
5. Remove cylinder barrel retaining ring (37) and
pull the hydrodynamic cylinder bearing (35) and
roll pins, if necessary, from the housing.
-025/-034/-046/-064/-065/-075/
-076/-098/-130
5. Remove the hydro-bearing retaining ring (37).
6. Remove socket head screw (36) and lock
washer (5).
7. Pull hydrodynamic cylinder bearing (35) from
housing.
DRIVESHAFT GROUP
1. Remove the drive key (22 or 23), if used and
the driveshaft bearing retainer ring (28).
2. Grasp outboard end of driveshaft (21) and pull
it out of the pump housing.
3. Remove shaft seal retainer (25). Remove
driveshaft seal (24) from housing ONLY if
necessary.
If the seal is removed it can not be reused.
It must be replaced.
SWASHBLOCK GROUP
1. Remove the socket head cap screws (34), the
housing cover (33) and O-ring (32).
2. Reach into the housing through the opening
and pull out the swashblock (29), along with
control pin (31).
The saddle bearing (30) is seated in the housing by
an integral pintle that engages a hole in the
housing.
3. Pull the saddle bearing (30) back (parallel to
driveshaft axis) until the pintle disengages from
the housing, then pull the saddle bearing out in
the same manner the swashblock was
removed.
!
WARNING
38
42
41
39
40
OILG0023
NOTE