Husqvarna 131RB Workshop Manual page 60

8.14.2 To clean and examine the crankshaft and
crankcase
The crankshaft can not be repaired, it must be replaced
if it is worn or damaged.
1. Examine the large end of the connecting rod.
Replace the crankshaft if you see scratch marks,
discoloration on the sides or damaged needle
holders.
2. Examine the small end of the connecting rod.
Replace the crankshaft if you see scratch marks or
discoloration in the bearing track.
3. Examine the bearing. Make sure the connecting rod
does not have radial play. Make sure the connecting
rod have axial play. Axial play is necessary for
lubrication of the bearing.
8.14.3 To assemble the crankshaft and crankcase
1. Attach the bearing.
60 - Repair instructions
a) Put the bearing in the crankcase and the
crankcase cover.
b) Use a hot air gun to increase the temperature of
the crankcase and crankcase cover to 110°C.
c) Use a hammer and an applicable punch to hit
the bearings into position.
d) Make sure that the bearings is against the
shoulder in the bearing seat.
2. Attach the sealing rings.
a) Attach the sealing rings in the crankcase and the
crankcase cover with an applicable punch.
b) Turn the sealing rings so the abraded edge
faces inwards.
c) The sealing ring on the flywheel side must be 5
mm below the edge of the bearing seating. Make
sure the sealing ring levels with the crankcase
on the starter side.
3. Attach the crankshaft.
a) Lubricate the stub axle with some oil and
carefully move the crankshaft (E) into the
bearing in the crankcase (G).
b) Make sure that the 2 guide bushings (H) are in
position in the crankcase.
627 - 002 - 23.04.2018