Husqvarna 250PS - Manual (Page 11)

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11
SAFETY INSTRUCTIONS
WARNING!
Defective cutting equipment can increase
the risk for accidents.
Check regularly the degree
of wear on the drive wheel.
Change if it is irregularly
worn.
The chain drive wheel
should be changed each
time the chain is changed.
B. Chain drive wheel
1. Check that the oil
channel in the bar is not
obstructed. Clean if
necessary.
2. Check that the groove in
the edge of the bar is
clean. Clean if necessary.
3. Check that the bar tip
sprocket turns freely.
If the chain lubrication
system is still not
working after carrying
out the above measures
you should contact your
service agent.
B. Procedure if the lubrication does not
function:
Checking wear on cutting equipment
A. Saw chain
Check the saw chain daily
for:
• Visible cracks in rivets
and links.
• Whether the chain is
stiff.
• Whether rivets and links
are badly worn.
Use a new chain to
compare the wear on the
old one.
When the length of the
cutting teeth has worn
down to only 4 mm the
chain must be replaced.
C. Guide bar
Check regularly:
• Whether there are burrs
on the edges of the bar.
Remove these with a file
if necessary.
• 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 one side of the bar tip
this is due to a slack
chain.
• To prolong the life of the
bar you should turn it
over daily.
min 4 mm
(0,16")
!