Correctly adjusted carburettor, Chain brake and front hand guard, Maintenance – Husqvarna 55 User Manual
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English
MAINTENANCE
Correctly adjusted carburettor
When the carburettor is correctly adjusted the machine
accelerates without hesitation and 4-cycles a little at full
throttle. It is also important that the chain does not rotate at
idle. If the L-jet is set too lean it may cause starting difficulties
and poor acceleration. If the H-jet is set too lean the machine
will have less power, poor acceleration and could suffer
damage to the engine.
Checking, maintaining and servicing
chain saw safety equipment
Chain brake and front hand guard
Checking brake band wear
Brush off any wood dust, resin and dirt from the chain brake
and clutch drum. Dirt and wear can impair operation of the
brake.
Regularly check that the brake band is at least 0.6 mm thick
at its thinnest point.
Checking the front hand guard
Make sure the front hand guard is not damaged and that there
are no visible defects such as cracks.
Move the front hand guard forwards and back to make sure it
moves freely and that it is securely anchored to the clutch
cover.
Checking the inertia brake release
Place the chain saw, with the engine switched off, on a stump
or other stable surface. Release the front handle and let the
saw fall by its own weight, rotating around the rear handle
towards the stump.
When the bar hits the stump the brake should be applied.
Checking the brake trigger
Place the chain saw on firm ground and start it. Make sure the
chain does not touch the ground or any other object. See the
instructions under the heading Start and stop.
Grasp the chain saw firmly, wrapping your fingers and thumbs
around the handles.
Apply full throttle and activate the chain brake by tilting your
left wrist forward onto the front hand guard. Do not let go of
the front handle. The chain should stop immediately.
Note! All service and repair work on the machine demands
special training. This is especially true of the machine’s
safety equipment. If your machine fails any of the checks
described below we recommend that you take it to your
service workshop.