Gear Housing - Bearing Replacement - Husqvarna DMS 240 Workshop Manual

7 GEAR HOUSING – BEARING REPLACEMENT
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Bearings
Both bottom bearings are press-fitted in the gear
housing and on the shaft. A retaining ring in the gear
housing secures the position of the bearings. Radial
seals for water distribution to the drill are located at the
bottom of the gear housing.
When removing the spindle shaft, the bearings are
subject to major axial forces which may damage them.
The recommendation is to replace bearings when the
shaft is removed. The radial seals should always be
replaced in connection with bearing replacement.
Removal
Remove the outer sealing ring
The seal rings are pressed in from each side of the gear
housing. Remove the upper seal.
Remove the circlip
The large circlip, which locks the bearings in place, is
removed using a large circlip pliers.
Remove the bearings
Both bearings for the spindle shaft are pressed out in
the direction towards the gear housing. The easiest way
to remove is by using a hydraulic press.
Put a tool sleeve, 22mm usually fits, on the bearing of
the inner ring, (pushed past the radial seal). Press down
the bearings from the gear housing.
Heating around the bearing seat, about 100 °C/200 °F,
reduces the press force considerably.
Bearings
Both bearings are identical and symmetrical.
Preferably replace the bearings once they are removed.
Alternatively, a careful check should be made that the
bearings are not damaged during removal.
Remove the inner sealing ring
The inner sealing ring is accessible when the bearings
have been removed. Skew a mandrel facing the ring and
knock around to remove it.
The sealing rings will be damaged during removal
and must always be replaced with new ones.