EBARA EFQT8 - Manual (Page 30)

EBARA Fluid Handling 29
Press the inboard oil seal (18) from the bearing
housing.
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.
Inspect 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 (18) 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.
The bearings may be heated to ease
installation. Na 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.
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.
NOTE
Position the inboard bearing (4) on the shaft
as indicated by the following illustration
BALL LOADING
GROOVE POSITIONED
TOWARD IMPELLER
LOADING
GROOVE
BALL LOADING
GROOVE POSITIONED
AWAY FROM IMPELLER
DIRECTION OF
THRUST
DIRECTION OF
THRUST
INSTALLATION OF MRC/SKF 5300M OR
FAFNIR 530W SERIES BEARINGS
(OPEN OR ENCLOSED IMPELLERS)
INSTALLATION OF NEW DEPARTURE OR
BCA/FEDERAL MOGAL 5300W SERIES BEARINGS
(OPEN OR ENCLOSED IMPELLERS)
LOADING
GROOVE
Figure 4. Inboard Bearing Positioning