Figure 5-7
Figure 5-8
Figure 5-6
Figure 5-5
Figure 5-4
Page 512
CHART 1
P2
Inside Diameter
1"
Outside Diameter
2"
When installing or removing bearings
from the shaft, the use of an arbor
press is strongly recommended.
To disassemble the pedestal:
Refer to Figure 5-3 for reference to
the numbered parts in the procedures
below.
1. Remove the fl inger (#21) located in
the pump end of the bearing pedestal
(#3).
2. Using a snap ring plier, remove snap
ring (#4).
3. Open the jaws of the vice approxi-
mately 2-1/4".
4. Place the pedestal, pump side down,
on the jaws. Refer to Figure 5-4.
5. Using a plastic or wooden
mallet, gently tap on the end of the
shaft until it slides out of the frame.
Both bearings should come out with
the shaft. Do not use a metal ham-
mer, severe damage to the shaft will
occur.
6. Using the arbor press, remove the
two (2) bearings from the shaft. Refer
to Figure 5-5. If the inner race is well
supported during this operation, no
damage will be done to the bearings.
If an arbor press is not available, a
bench vise may be substituted using
the following instructions.
1. Remove the pedestal and
close the jaws to approxi-mately 1-
1/8".
2. Place the shaft with either
bearing resting on top of the jaws
and gently tap on the end of the
shaft until the bearing is removed.
Refer to Figure 5-6.
3. Repeat step 2 to remove the other
bearing. Good support used on
the inner races will prevent bearing
damage.
5C Inspection of Components
Thoroughly clean all parts. All compo-
nents should be examined for wear and
corrosion. Replace any parts showing
visible wear.
Check to be certain that a press fi t still
exists between the shaft and the bear-
ings. New bearings
New bearings, or at least cleaned
and regreased bearings, are recom-
mended.
Check the shaft for galling, pitting,
and corrosion. Surface corrosion on
the pump portion of the shaft must be
removed so the seals will slide freely
during assembly. The shaft diameter
should be no smaller than .002" below
the nominal fractional seal sizes.
Remove any nicks or burrs which may
have occurred during disassembly.
Reclean parts as necessary.
5D Reassembly
All parts should be visually inspected
and cleaned or replaced as outlined
in 5C above. It is recommended that
the bearings be replaced anytime the
bearing pedestal is disassembled for
service.
1. Using an arbor press, install the
bearings on the shaft prior to install-
ing the shaft into the pedestal. A
steel “donut” with the proper inside
diameter and outside diameter,
Refer to Chart 1, should be used
between the arbor face plate and
the lower bearing to insure proper
installation and to prevent bearing
damage. The bearings must seat
against the shoulder for proper align-
ment. Refer to Figure 5-7. *Also
refer to Alternate bearing installation
procedures.
2. Place the pedestal, pump mount-
ing surface up, in a vise or suitable
fi xture and insert the bearing assem-
bly. It should be possible to install
the shaft assembly with fi rm thumb
pressure. Refer to Figure 5-8. If
more force is required, the butt end
of a hammer handle or plastic mallet
may be helpful. The shaft assembly
should never be forced or driven in.
3. Install the snap ring (#4) in
the pump end of the pedestal. Be
sure the snap ring is seated properly
in the groove. The beveled edge of
the ring should face away from the
bearing.
4. Install the fl inger over the snap ring.
The bearing pedestal is now ready
for pump and motor installation.
*Alternate bearing installation pro-
cedures.
