EBARA EFQT3 - Manual (Page 30)

EBARA Fluid Handling 30
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 250º 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.
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 (18).
Slide the shaft and assembled bearings into
the bearing housing until the retaining ring
on the outboard bearing seats against the
bearing housing.
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 (9) into the
bearing cap (15) with the lip positioned as
shown in figure 2. Replace the bearing cap
gasket (21), and secure the bearing cap with
the hardware (13 and 14). Be careful not to
damage the oil seal lip on the shaft keyway.
Lubricate the bearing housing as indicated in
LUBRICATION.
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.
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 and
replace as necessary.
Most cleaning solvents are toxic and
flammable. Use them only in a well-
ventilated area free form excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent containers.
Clean the bearings thoroughly in fresh
cleaning solvent. Dry the bearings with
filtered compressed air and coat with
light oil.
Bearings must be kept free of all dirt and
foreign material. Failure to do so will greatly
shorten bearing life. DO NOT spin dry
bearings. This may scratch the balls or races
and cause premature bearing failure.
Rotate the bearings by hand to check for
roughness or binding and inspect the
bearings balls. If rotation is rough or the
bearing balls are discolored, replace the
bearings.
The bearing tolerances provide a tight press
fit onto the shaft and a snug slip fit into the
bearing housing. Replace the bearings,
shaft, or bearing housing if the proper
bearing fit is not achieved.
If bearing replacement is required, remove
the outboard bearing retaining ring (18), and
use a bearing puller to remove the bearings
from the shaft.
Press the inboard oil seal (7) from the
bearing housing.
CAUTION!
WARNING!
CAUTION!
CAUTION!
CAUTION!