Bulletin 947023
THE OILGEAR COMPANY
13
ROTATING GROUP
The rotating group is 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.
On thru-shaft pumps, the tailshaft bushing
assembly
(307, 308, 309)
or a coupling will have to
be removed (a “jacking” screw can be used) before
the rotating group can be disassembled.
1. Place the pump in a horizontal position.
2. Remove the rotating group by turning shaft
(301)
slowly, while pulling the cylinder barrel
(101)
from the housing.
3.
Identify (number) each pump piston shoe
assembly
(102)
and its respective bore in the
cylinder barrel
(101)
and shoe retainer
(104)
for
easy reassembly.
4. See Figure 6. Lift out shoe retainer
(104)
with
pistons
(102)
and remove the fulcrum ball
(103)
and shoe retainer spring
(105)
.
Figure 6. Rotating Group Disassembly (5V-12015-L)
5. Remove retaining ring
(208)
and plug
(205)
and
pull the hydrodynamic bearing
(202)
from the
housing.
DRIVE SHAFT GROUP
1. Remove the drive key
(303)
, if used, and the
drive shaft bearing retainer ring
(305)
.
2. Grasp outboard end of drive shaft
(301)
and
pull it out of the pump housing.
3. Remove the shaft seal retainer
(302)
and shaft
seal
(007)
from the housing only if necessary.
SWASHBLOCK GROUP
Reach inside the case through control mounting
opening and remove the swashblock
(201)
and
saddle bearings
(204)
.
INSPECTION
Clean all parts thoroughly and allow them to dry.
Inspect all seals and O-rings for hardening,
cracking or deterioration. Replace if necessary or if
you suspect damage. Check all locating pins for
damage and springs for cracking or signs of wear.
Wear proper protective gear when using
solvents or compressed air, servicing or
maintaining the hydraulic system or the
Oilgear pump. Wear correct protective
gear, safety glasses, gloves and safety
shoes. Serious injury can result without
proper protective gear.
CONTROL GROUP
Refer to the reference material on pump controls.
Be sure to carefully check the control pin for cracks
and/or signs of fatigue. Check fit of the pin in the
swashblock. It should be a slip-fit without side-play.
Replace if necessary or if you suspect damage.
!
WARNING
104
102
103
105
101
OILG-0004
!
WARNING
