Milnor 72044SR2, Механические детали и сервисное обслуживание, Страница: 77 / 175

Pellerin Milnor Corporation
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tightened, work between the front and rear bearings and turn the basket by hand periodically,
while tightening the lock nut(s).
2. After tightening the bearing(s) onto the tapered shaft, check the internal clearance as pictured
in Figure 40 , by working a feeler gauge between the outer race and a roller of the outer row
then between the outer race and a roller of the inner row.
NOTE: Sometimes, when setting the bearings, all the load is taken by only one row
of rollers (although the load would quickly equalize on both rows after the machine
has run for only a few minutes). If all the load is taken by one row, you will get an er-
roneous clearance reading. It is therefore, necessary to use the feeler gauge to measure
the
clearance of both rows of rollers . With the bearing in place on the machine it is
admittedly rather difficult to get a feeler gauge back past the first row of rollers to
measure the second
but it must be done .
3. If one row of rollers is tight but the other has measurable clearance, tap lightly on the end of
the shaft nearest the tight row of rollers to cause the shaft to shift axially and equalize the roll-
er loading. Adjust the bearing tightness to achieve the internal clearance previously
calculated.
4. When the proper internal clearance has been attained, lock the nut by bending over the match-
ing tang on the lock washer, making sure that all unused tangs are bent as near the nut as pos-
sible so that they will not rub against the bearing roller cage.
NOTE:
Check each unused tab individually to insure this.
Figure 39. Tightening the Bearing Lock nut
(42" machine shown)
Figure 40. Measuring the Mounted Internal
Clearance of the Bearing (42" machine shown)
5. With the grease gun, fill the space between the bearing and the front of the housing 1/3 full of
grease.
6. Install the bearing cover plate or shaft seal holder, as appropriate. When installing the shaft
seal holder, take care not to damage the seal as it is gently pushed over the shaft. Cover the
keyway on the end of the shaft with tape to prevent the sharp corners of the keyway from cut-
ting the seal lip. Also, make sure that the seal lip does not turn over as it passes over rough
areas.
Drive Assemblies