Bulletin 947070-B
THE OILGEAR COMPANY
23
ASSEMBLY
During reassembly, torque fasteners and
plugs to specifications in Table 6. Refer to
Table 6, Fasteners and Plugs Torque.
See Figures 11, 12 and 13. Follow the disassembly
procedures in reverse for re-assembling the pump.
During assembly, install new gaskets, seals and
O-rings. Apply a thin film of CLEAN grease or
hydraulic fluid to sealing components to ease
assembly. If a new rotating group is used, lubricate
thoroughly with CLEAN hydraulic fluid. Apply fluid
generously to all wear surfaces.
CONTROL GROUP
If used,
1. Install control piston (19) into control cylinder
bore.
2. Install control piston spring (20) into control
piston.
3. Install spring side of control end plugs (17) into
housing with O-ring (18) installed. Start with
one to two turns.
4. If used, assemble the maximum volume stop
components.
5. Complete installation of control end plugs:
torque piston side plug and then torque plugs
to 350 ft•lbs (475 N•m).
SWASHBLOCK GROUP
If removed,
1. Press new driveshaft seal (24) flush and flat
into pump housing.
2. Working through the bore for the housing cover
(33), insert the saddle bearing (30) in the pump
housing so the integral pintle engages the hole
in the housing.
3. Place the control pin (31) in the swashblock
(29) in a position to engage the slot in the
control piston. Again, reaching through the
bore for the housing cover, insert the pin into
the control piston slot. Make sure the raised
surface of the swashblock is received by the
indented surface of the saddle bearing as you
push the swashblock (29) against the saddle
bearing. Visually, be sure the holes (to receive
the driveshaft) are aligned with the center of the
hole in the pump housing for the driveshaft.
4. Place housing cover (33) with O-ring (32) in place
and secure with socket head cap screws (34).
DRIVESHAFT GROUP
1. Place seal retainer (25) in its bore.
2. Lubricate the driveshaft assembly (21) and the
shaft seal (24).
3. Insert the driveshaft assembly (21) through the
shaft seal (24), into the case, through the hole
in the saddle bearing and swashblock until the
front driveshaft bearing bottoms in its bore.
Lock in place with bearing retainer ring (28).
ROTATING GROUP
1. Install the hydrodynamic cylinder bearing (35)
into the pump housing. Lock in place with
cylinder bearing retainer ring (37) and socket
head cap screw (36) and lock washer (5) if
used.
The ends of retaining ring must be in the
groove machined in housing (1).
See Figure 9.
2. Place the cylinder barrel (38), wear surface
down, on a clean cloth.
3. Place the shoe retainer spring (42) in the
center of the barrel with the fulcrum ball (41) on
top of it.
4.
Insert the identified pistons (39) into their
corresponding identified holes of the shoe
retainer plate (40). As a unit, fit the pistons into
their corresponding, identified bores in the
cylinder barrel. DO NOT FORCE. If everything
is aligned properly, the pistons will fit smoothly.
The rotating group weight 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.
The rotating group can now be carefully installed
over the tail of the driveshaft (21) and into the
pump housing (1).
NOTE
NOTE
!
WARNING