EBARA EFQU4 - Manual (Page 30)

EBARA Fluid Handling 29
NOTE
If a hot oil bath is used to heat the bearings, both
the oil and the container must be absolutely
clean. If the oil has been previously used, it must
be thoroughly filtered.
Heat the bearings to a uniform temperature no
higher than 250 º F (120º C), and slide the
bearings onto the shaft, one at a time, until they
are fully seated. This should be done quickly, in
one continuous motion, to prevent the bearings
from cooling and sticking on the shaft.
After the bearings have been installed and
allowed to cool, check to ensure that they have
not moved away from the shaft shoulders in
shrinking. If movement has occurred, use a
suitable sized sleeve and a press to reposition the
bearings against the shaft shoulders.
If heating the bearings is not practical, use a
suitable sized sleeve and an arbor (or hydraulic)
press to install the bearings on the shaft.
CAUTION!
When installing the bearings onto the shaft, never
press or hit against the outer race, ball, or ball
cage. Press only on the inner race.
Secure the outboard bearing on the shaft with the
bearing retaining ring (14).
Slide the shaft and assembled bearings into the
bearing housing until the retaining ring on the
outboard bearing seats against the bearing
housing.
CAUTION!
When installing the shaft and bearings into the
bearing bore, push against the outer race. Never
hit the balls or ball cage.
Press the outboard oil seal (11) into the bearing
cap (10) with the lip positioned as shown in figure
2. Replace the bearing cap gasket (09), and
secure the bearing cap with the hardware (24 and
25). Be careful not to damage the oil seal lip on
the shaft keyway.
Lubricate the bearing housing as indicated in
LUBRICATION.
Shaft and Bearing Reassembly and
installation
(Figure 2)
Clean the bearing housing, shaft and all component
parts (except the bearings) with a soft cloth soaked
in cleaning solvent. Inspect the parts for wear or
damage as necessary
.
WARNING!
Most cleaning solvents are toxic and flammable.
Use them only in a well-ventilated area free from
excessive heat, sparks, and flame. Read and
follow all precautions printed on solvent
containers.
Inspected the shaft for distortion, nicks or scratches,
or for thread damage on the impeller end. Dress
small nicks and burrs with a fine file or emery cloth.
Replace the shaft if defective.
Position the inboard oil seal (04) in the bearing
housing bore with the lip positioned as shown in
figure 2. Press the oil seal into the housing until the
face is just flush with the machined surface on the
housing.
CAUTION!
To prevent damage during removal from the shaft, it
is recommended that bearings be cleaned and
inspected in place. It is strongly recommended
that the bearings be replaced any time the shaft
and bearings are removed.
NOTE
Position the inboard bearing (06) on the shaft
with the shielded side toward the impeller end of
the shaft. Position the outboard bearing (15) on
the shaft with the integral retaining ring on the
bearing O .D. toward the drive end of the shaft.
The bearings may be heated to ease installation. An
induction heater, hot oil bath, electric oven, or hot
plate may be used to heat the bearings. Bearings
should never be heated with a direct flame or
directly on a hot plate.