Husqvarna 439 Operator's Manual page 22

Daily maintenance
Make sure that the guide bar and
saw chain are getting sufficient oil.
Do a check of the saw chain. Refer to
To examine the cutting equipment on
page 31 .
Sharpen the saw chain and do a
check of its tension. Refer to
sharpen the saw chain on page 28 .
Do a check of the chain drive sprock-
To do a check of the spur
et. Refer to
sprocket on page 31 .
Clean the air intake on the starter.
Make sure that nuts and screws are
tightened.
Do a check of the stop switch. Refer
To do a check of the start/stop
to
switch on page 24 .
Make sure that these are no fuel
leaks from the engine, tank or fuel
lines.
Make sure that the saw chain does
not rotate when the engine is at idle
speed.
Make sure that there is no damage
on the right hand guard.
Make sure that the muffler is correct-
ly attached, has no damages and
that no parts of the muffler are miss-
ing.
Maintenance and checks of the
safety devices on the product
To do a check of the brake band
1. Use a brush to remove wood dust, resin and dirt
from the chain brake and clutch drum. Dirt and wear
can decrease the function of the brake.
2. Do a check of the brake band. The brake band must
be at a minimum of 0.6 mm/0.024 in thick at its
thinnest point.
22
Weekly maintenance
Clean or replace the air filter. Refer
To clean the air filter on page 27 .
to
Clean between the cylinder fins.
To
Monthly maintenance
Empty the fuel tank.
Empty the oil tank.
To do a check of the front hand guard and
the chain brake activation
1. Make sure that the front hand guard is not damaged
and that there are no defects, such as cracks.
2. Make sure that the front hand guard moves freely
and that it is attached safely to the clutch cover.
3. Hold the product with 2 hands above a stump or
other stable surface.
WARNING: The engine must be off.
823 - 002 - 08.11.2018