Husqvarna DMS 240 Workshop Manual page 13

GEAR HOUSING – BEARING REPLACEMENT
Fitting
The mounting of the bearings, spindle shaft and
associated components can basically be performed in
two ways:
– use a hydraulic press to fit the components with a
press fit.
– use heat/cold to expand/shrink the components and
assemble without press forces. If a heat gun or freezer is
available, this method is the easiest and gentlest method
for the bearings.
Inner sealing ring
Do not forget to fit the inner radial seal from the inside
of the gear housing. Lubricate the seal ring's sealing lip
which will later be in contact with the spindle shaft.
Turn the seal with the spring side down. A suitable
tool sleeve with extender serves excellently as an installa-
tion tool. Check that the seal is placed against the stop
after installation.
Outer sealing ring
The radial seal is fitted using the same method as the
inner seal, but assembled from the outside of the gear
housing.
Note: Both radial seals will lie with their spring sides
facing each other after installation!
Spindle shaft bearings
Both bearings are fitted from the inside of the gear hou-
sing. The bearings can be fitted using a hydraulic press,
one bearing at a time. A socket with an extension serves
as a tool. It is important that you apply pressure to the
outer ring of the bearings.
The alternative method is to place the bearings in a free-
zer (put the spindle shaft in at the same time) and heat
the gear housing to about 100 °C/200 °F. The bearings
are then usually simply lowered into place without any
press force.
Fit the retaining ring
Fit the circlip using circlip pliers.
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