Gear Housing - Bearing Replacement - Husqvarna DM 230 Workshop Manual

7 GEAR HOUSING – BEARING REPLACEMENT
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12
Bearings
The lower bearing of the spindle shaft is forced fitted to the gear housing and
on the shaft. Circlips on the shaft secure the position.
It is easiest and best to replace the bearing using a hydraulic press. If this is
unavailable, you can remove and fit with a low force fit by utilising differences
in temperature.
Important
!
Be careful not to scratch the shaft where the seals make contact, immediately
above the bearing and the shaft end by the gear box cover.
Bearing replacement
– spindle bearings
Removing outer circlip
Pull out the spindle shaft
The adjoining arrangement is an
excellent way of pulling the
spindle shaft out together with
the bearing.
Removing inner circlip
Pull the shaft out of the bearing
Using the adjoining solution, the bearing can be removed without the risk of
damaging the shaft. Use smooth jaws in the vice and attach the shaft using
light pressure ensuring it can slide along the jaws. Pull the shaft out of the
bearing.
Reassembly
If the bearing is forced in place there is a major risk of damage to the shaft
next to the bearing – see above "Important". We recommend the following
method: Heat the ball bearing to around 100 °C.
If possible cool the shaft in a cold store or with cooling spray prior to
assembly. The bearing can then be pushed in place without using force.
Fit inner circlip.
Oil seal
The oil seal is removed and fitted from the outside of the gear housing. A 34
mm socket is usually suitable as a tool. Lubricate the oil seal when assembling
and knock it in level with the inside of the gear housing.
Fitting the spindle shaft
The spindle shaft can normally
be fitted to the gear housing
without force if the shaft has
been cooled and the bearing seat
in the gear housing has been
heated.
Bearing replacement –
spindle bearings
Removing outer circlip
Remove the circlip using circlip pliers.
Pull out the spindle shaft
The adjoining arrangement is an excell-
lent way of pulling the spindle shaft out
together with the bearing.
Attach the gear housing in the vice
using soft jaws and a little pressure. Tape
on a flat steel bar, e.g. a cold chisel on
the opposite side. Put the puller claws at
the spindle shaft's wrench flat and pull
out the shaft with the puller.
Removing inner circlip
Remove the ball bearing's inner circlip.
Fitting the spindle shaft
Cool the ball bearing using cooling
spray or place the shaft in a cold store.
Heat the bearing seat on the gear housing
to around 100 °C. The spindle shaft can
then normally be fitted in the gear