Husqvarna K1270 Workshop Manual page 72

Cutting head
19.2. BEARING REPLACEMENT
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 and axle has been designed to
provide a distinct position for the shaft in the axial
direction and to prevent the risk of incorrect fitting.
The overall assembly principle is to first install a
bearing in the bearing housing. The next bearing is
then fitted along with the axle.
BLADE SHAFT AND 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 bear-
ing's inner rings are press-fitted against the shaft
and the outer rings are press-fitted against the
bearing housing.
NOTE! 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 damag-
ing the ball bearings.
TOOLS
To replace the blade shaft bearings you need tool
kit 575 96 20-01 if the bearing replacement is
made by hydraulic press. This tool kit eliminates
the risk of damaging the belt pulley or the bearing
and is 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.
Further information, see: 4. Engine special tools on
page 11.
DISMANTLING
1. Turn the dismantling support (A) with shoulder
up and put the bearing housing on the device.
2. 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.
3. 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
72
- English
BLADE SHAFT HOUSING
BLADE SHAFT AND BEARING
BEARINGS REPLACEMENT - DISMANTLING