Centrifugal Clutch; Changing The Clutch Spring; Changing The Worm Gear; Checking Wear - Husqvarna 181 Workshop Manual

Centrifugal Clutch
Removal
Fit the piston stop No. 5025033-01 into the spark plug hole. Remove the
clutch centre by means of combination tool No. 50 15375-01. NOTE! Left-
hand threads. Lift off clutch centre and clutch drum. Do not lose the washer
placed behind the drum.
A
,;:,
Changing the clutch spring
b
The clutch spring should be exchanged if it has been overheated (blue
coloured) or broken. It is easily exchanged with pliers No. 5025049-01.
When fitting the new spring, check that its ends connect in the centre of a
clutch shoe. Do not overstretch the spring!
1
Changing the worm gear
The worm gear of the oil pump drive is easily removed from the clutch drum.
It has four dogs which fit into four corresponding grooves in the clutch drum.
When fitting a new gear, put it in the clutch drum and check that it fits exactly
into the grooves of the drum. Then fit the drum with gear on to the crankshaft.
Do not forget the washer behind the worm gear!
Checking wear
Check the wear of the clutch centre and the clutch shoes. There should be at
least 1 mm left on the friction surface of the shoes.
All the shoes have to be exchanged on the same occasion.
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