Checking, Maintaining And Servicing Chain Saw Safety Equipment - Husqvarna 334T Operator's Manual

High speed jet H
• The high speed jet H affects the power and speed of
the machine. If the high speed jet is set too lean
(screwed in too far) it will cause the machine to over-
rev and damage the engine. Turn the high speed jet H
anticlockwise until it stops. If the engine runs
unevenly, turn the high speed jet clockwise until the
engine runs evenly.
• The high speed jet H is correctly adjusted when the
machine burbles slightly. If the machine "screams",
the setting is too lean. If the muffler emits a lot of
smoke and the machine burbles a lot, the setting is too
rich. Turn the high speed jet H clockwise to achieve a
setting that sounds right.
CAUTION! To adjust the carburettor correctly you
should contact a mechanic with access to a rev counter.
Correctly adjusted carburettor
When the carburettor is correctly adjusted the machine
accelerates without hesitation and burbles 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. If the L and H-jets
are set too rich it will lead to acceleration problems or too
low a working speed.
Checking, maintaining and
servicing chain saw safety
equipment
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.
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.
30 – English
MAINTENANCE
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 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