Gear Housing - Bearing Replacement - Husqvarna DM 650 Workshop Manual

8 GEAR HOUSING – BEARING REPLACEMENT
1
3
1
14
2
2
Tools
Dismantling
The following tools are required for removing the gear
housing's bearing:
1. Internal bearing extractor to grip behind the bearings.
2. Use a counter stay device where there is a counterhold.
3. A slide hammer is an alternative to the counter stay
device if there is no counterhold available.
Fitting
Since replacement of these bearings rarely occurs, there is
no fitting device. A suitable assembly tool can be very
easily produced using a screw of an appropriate length,
nut, washer and tape. Tape the threads ensuring the bea-
rings are held in place.
1. Fitting device for needle bearings.
2. Fitting device for ball bearings. It is important that the
washers have a large enough diameter to support the ball
bearing's outer ring when fitting. Press or knock down
the bearing in place in the gear housing.
Gear housing ball bearings
Dismantling
Remove using a counter stay device. As it is difficult to
find good support points for the counter stay device, the
easiest solution is to create a bridge with a couple of
strips of wood on the gear housing. Support the counter
stay device against these and pull up the bearing.
Fitting
Use the tools solution as shown in image 2 above. Push
or knock in the bearing.
Needle bearing
Dismantling
Remove using a counter stay device.
Fitting
Use the tool solution as shown in image 1 above. Push or
knock in the bearing.
Note that the needle bearing cover usually has different
radii, marked with arrows in the image. Fitting is easier
if the most rounded side faces inwards to the bearing
housing.