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Husqvarna 439 Manual

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36 – English
MAINTENANCE
Maintenance schedule
The following is a list of the maintenance steps that must be performed on the machine. Most of the items are described
in the Maintenance section.
Daily maintenance Weekly maintenance Monthly maintenance
Clean the outside of the machine. Check the cooling system weekly.
Check the brake band on the chain
brake for wear. Replace when less
than 0.6 mm (0,024 inch) remains at
the most worn point.
Check that the components of the
throttle trigger work safely. (Throttle
lockout and throttle trigger.)
Check the starter, starter cord and
return spring.
Check the clutch centre, clutch drum
and clutch spring for wear.
Clean the chain brake and check that
it operates safely. Make sure that the
chain catcher is undamaged, and
replace it if necessary.
Check that the vibration damping
elements are not damaged.
Clean the spark plug. Check that the
electrode gap is 0.65 mm.
The bar should be turned daily for
more even wear. Check the
lubrication hole in the bar, to be sure it
is not clogged. Clean the bar groove.
If the bar has a sprocket tip, this
should be lubricated.
Lubricate the clutch drum bearing. Clean the outside of the carburettor.
Check that the bar and chain are
getting sufficient oil.
File off any burrs from the edges of
the bar.
Check the fuel filter and the fuel hose.
Replace if necessary.
Check the saw chain with regard to
visible cracks in the rivets and links,
whether the saw chain is stiff or
whether the rivets and links are
abnormally worn. Replace if
necessary.
Clean the carburettor compartment.
Empty the fuel tank and clean the
inside.
Sharpen the chain and check its
tension and condition. Check the drive
sprocket for excessive wear and
replace if necessary.
Clean the air filter. Replace if
necessary.
Empty the oil tank and clean the
inside.
Clean the starter units air intake. Check all cables and connections.
Check that nuts and screws are tight.
Clean or replace the spark arrestor
mesh on the muffler.
Check that the stop switch works
correctly.
Check that there are no fuel leaks
from the engine, tank or fuel lines.
Check that the chain does not rotate
when the engine is idling.
H1156898-39,439,west,R1.fm Page 36 Monday, March 24, 2014 1:43 PM
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