31
Repair Information
– Series 2 Variable Displacement Pump
Figure 31
Next, remove the rear bear-
ing shims from the end
cover. Make sure not to
misplace these shims, as
they are used to adjust the
main pump shaft bearing
end play or preload. (see
Figure 30)
Do not remove the two In-
ternal Pressure Override
passage plugs located in
the end cover as shown
here. However, if the unit
you are working on has the
Internal Pressure Override
option and you are going
to change the pump input
rotation, these two plugs must be removed and installed into
the other two passage ports. (see Figure 31)
Remove the two hollow
dowels from the pump
housing. (see Figure 32)
Using an O-ring pick or
similar tool, remove the
sealing O-rings and backup
rings from the pump hous-
ing. Only units with the
optional Internal Pressure
Override option incorpo-
rated the additional O-rings
and backup rings as shown
here. (see Figure 33)
NOTE: Like in the pump end cover, when ever the pump input
rotating is changed, the two passage plugs located in the pump
housing must also be removed and installed into the other two
ports.
Next, remove the bearing plate
and two dowel pins from the
cylinder barrel. NOTE: If a
small screwdriver or similar
tool is used to pry the bearing
plate from the cylinder barrel,
extreme caution must be used
not to scratch or damage the
cylinder barrel’s or bearing
plates lapped surfaces. (see
Figure 34)
Shown here are both the valve
and bi-metal bearing plates.
The bearing plates are inter-
changeable with the same se-
ries plates used on the series
one transmissions. The valve
plates are also interchangeable
with the same series plates
used on the series one tandem
pumps. The bearing plates are bidirectional and the valve plates are
unidirectional. (see Figure 35)
Next , remove the hold-down
springs. (see Figure 36)
NOTE: Earlier units did not use
washers.
Install a low clearance split type
bearing puller under the rear
bearing. You can use the same
size and type of puller that was
used on the EATON Series 0 or
ball guide transmissions. (see
Figure 37) NOTE: IF you do
not have a low clearance puller,
please see the special tool sec-
tion located on page 57 in the back of this manual for the dimensions
required to make a low clearance puller.
Install the puller on the split
type bearing puller. Do not re-
move the rear bearing at this
time. Use the puller handle to
remove the pump shaft,
swashplate and rotating group
from the pump housing. (see
Figure 38)
Figure 36
Figure 30
Figure 33
Figure 32
Figure 34
Figure 34
Figure 35
Figure 37
Figure 38