Thread Insert; Guide Bar Bolts - Husqvarna 455 Rancher Workshop Manual

Repairing damaged threads
A repair kit, 503 27 33-01, is available for repairing
damaged threads.
First drill out the hole using:
6.1 mm drill bit for magnesium crankcase
6.0 mm drill bit for plastic crankcase
Then screw in the thread insert using a suitable
bolt and spanner.
This type of thread insert is best suited for use
in plastic and magnesium, but not for repairing
threads in aluminium. In that case use a helicoil
insert with metric screw.
Changing the front bar bolt
1
Drain the oil tank.
2
Knock through the old guide bar bolt so that it falls
into the oil tank. (The plastic skin covering the head
will break.)
3
Remove the bolt from the oil tank.
4
Fasten a steel wire to the thread of the new bolt,
feed the steel wire into the oil tank and out through
the bolt hole in the crankcase.
5
Pull the steel wire until the bolt comes out through
its hole.
6
Pull through the bolt with its nut. Place a spacer
between the nut and crankcase.
7
Check that the square shoulder of the bolt is cor-
rectly seated in the recess in the crankcase.
8
Refi ll with chain oil.
Changing the rear bar bolt
1
Dismantle the cylinder cover, hand guard and
muffl er.
2
Knock in the bar bolt.
3
Pull a new bar bolt in place with help of a nut and
spacer like for the front bar bolt.
4
Check that the square shoulder of the bolt is cor-
rectly seated in the recess in the crankcase.
Repair instructions
39
English –