Maintenance Of The Chain Brake - Husqvarna CHAIN SAW 266 Operator's Manual

Chain brake activator "Swed-o-Matic"
The Swed-o-Matic should release the chain brake at a certain load
on the guide bar tip.
Adjusting the release power
The distance between the Swed-o-Matic release screw and the
front handle (B) determines the release power. A smaller
gap means reduced release power.
The release power can be checked as follows: Push the guide bar
tip against a spring balance, With a 15" guide bar the chain brake
should be released at a load of 10–15 kp.
The forestry worker could make a rough check on the spot as follows:
Hold the saw horizontally over a trunk, at a height of abt 35 cm. As
the saw by force of its own weight swings around the rear handle
and hits the trunk, the brake should be released.
Note that during this check the engine must not be running. If the
brake is not released, contact your service workshop.
Nut M should be tightened completely.
Maintenance of the chain brake
Clean the brake band and the mechanism. Check that the band
has at least 0.75 mm thickness on the most worn part.
Lubricate the links and supports of the brake mechanism with two-
stroke oil. Release and lock the brake repeatedly to check that the
mechanism works smoothly.
Check the chain brake function regularly. Start the saw on clear
ground making sure that the chain runs freely, Apply full throttle
and release the chain brake. The chain should immediately stop
rotating. If not, contact your service workshop.