Husqvarna K 760 Workshop Manual page 49

15
C
A
B
575 96 20-01
49
CUTTING HEAD
Blade shaft housing
The bearing housing carries dual ball bearings for the blade's drive shaft. The
belt pulley with retarder is located on the opposite side.
The bearing housing is unchanged, and the design of the bearing and axle
has been significantly improved in order to provide a distinct position for the
shaft in axial direction. The risk of incorrect fitting is now minimal.
However, the new design needs a new special tool, 575 96 20-01, to ensure
there is no risk of the belt pulley or bearings being damaged when replacing.
The assembly principle is to first install a bearing in the bearing housing.
The next bearing is then fitted along with the axle.
Blade shaft, bearings
The blade shaft has a fixed machined spacer which the bearings' inner rings
must be in contact with after assembly in the bearing housing. The bearing's
inner rings are press-fitted against the shaft and the outer rings are press-fitted
against the bearing housing.
It is very important not to expose the bearing to clamping forces between
the inner and outer rings during assembly. With the help of special tools and
assembly methods described here, the bearings are fitted without any risk of
the forces damaging the ball bearings.
506 37 61-02
Dismantling
Push or knock out the bearing
unit.
Remove the bearings from
the axle
Bearing replacement
Tools
To replace the blade shaft bearings you need tool kit
575 96 20-01 if the bearing replacement is made by
hydraulic press. The tools are used for both dismantling
and assembly.
If the hydraulic press is missing, the bearings can be
replaced in the manner described below, in which case tool
kit 506 37 61-02 is required.
Dismantling
Turn the dismantling support A with
shoulder up and put the bearing housing
on the device.
Put the triangle in the tool kit
506 37 61-02 or assembly support B in
kit 575 96 20-01 on top of the bearing.
Press or knock out the bearing unit as
far as possible. Then extend with a
suitable tool socket to push out the
complete bearing unit fully from the
housing.
Remove the bearings from the
axle
Remove the bearings using a universal
puller.