Husqvarna 418 EL Operator's Manual page 110

Tension the chain as tightly as possible, but not so tight
that you cannot pull it round freely by hand. (26)
• Release the knob by folding it out until it snaps open.
• Turn the knob anti clockwise to loosen the drive
sprocket cover.
• Adjust the tension on the chain by turning the chain
tensioner wheel down (+) for tighter tension and up (-
) to loosen the tension. (A-B)
• Tighten the bar clutch by turning the knob clockwise.
• Fold the knob back in to lock the tensioning.
Lubricating cutting equipment
WARNING! Poor lubrication of cutting
!
equipment may cause the chain to snap,
which could lead to serious, even fatal
injuries.
Chain oil
Chain oil must demonstrate good adhesion to the chain
and also maintain its flow characteristics regardless of
whether it is warm summer or cold winter weather.
Never use waste oil! Using waste oil can be dangerous
to you and damage the machine and environment.
Filling with chain oil
• All our chain saws have an automatic chain lubrication
system. On some models the oil flow is also
adjustable. (27)
• A full reservoir is sufficient for 15 minutes of steady
use.
• Never use waste oil. This results in damage to the oil
pump, the bar and the chain.
• It is important to use oil of the right grade (suitable
viscosity range) to suit the air temperature.
• In temperatures below 0°C (32°F) some oils become
too viscous. This can overload the oil pump and result
in damage to the oil pump components.
• Contact your service agent when choosing chain oil.
Checking chain lubrication
Aim the tip of the bar at a light coloured surface about 20
cm (8 inches) away. After 1 minute running at full throttle
you should see a distinct line of oil on the light surface.
(28)
If the chain lubrication is not working:
• Check that the oil channel in the bar is not obstructed.
Clean if necessary. (29)
• Check that the groove in the edge of the bar is clean.
Clean if necessary. (30)
• Check that the bar tip sprocket turns freely and that
the lubricating hole in the tip sprocket is not blocked.
Clean and lubricate if necessary. (31)
110 – English
GENERAL SAFETY PRECAUTIONS
If the chain lubrication system is still not working after
carrying out the above checks and associated measures
you should contact your service agent.
Chain drive sprocket
The drive system is fitted with a drive sprocket. (32)
Regularly check the degree of wear on the drive sprocket.
Replace if wear is excessive.
Checking wear on cutting equipment
Check the chain daily for:
• Visible cracks in rivets and links.
• Whether the chain is stiff.
• Whether rivets and links are badly worn.
Replace the saw chain if it exhibits any of the points
above.
We recommend you compare the existing chain with a
new chain to decide how badly the existing chain is worn.
When the length of the cutting teeth has worn down to
only 4 mm the chain must be replaced.
Guide bar
Check regularly:
• Whether there are burrs on the edges of the bar.
Remove these with a file if necessary. (33)
• Whether the groove in the bar has become badly
worn. Replace the bar if necessary.
• Whether the tip of the bar is uneven or badly worn. If
a hollow forms on the underside of the bar tip this is
due to running with a slack chain. (34)
• To prolong the life of the bar you should turn it over
daily. (35)