Bort BBK-2018 - Tensioning the Chain; Lubricating Cutting Equipment

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However,thissafetyfeaturerequiresthatyouusethe
right sort of chain oil (if the oil is too thin it will run out
before the fuel), and that you adjust the carburetor as
recommended (a lean mixture may mean that the fuel
lasts longer than the oil) and that you also use the rec-
ommended cutting equipment (a bar that is too long will
use more chain oil).
Checking chain lubrication
● Check the chain lubrication each time you refuel.
See instructions under the heading Lubricating the
bar tip sprocket.
Aim the tip of the bar at a light coloured surface about
20 cm (8 inches) away. After 1 minute running at 3/4
throttle you should see a distinct line of oil on the light
surface.
If the chain lubrication is not working:
● Checkthattheoilchannelinthebarisnotobstruct-
ed.
Clean if necessary.
● Checkthatthegrooveintheedgeofthebarisclean.
Clean if necessary.
● 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.
If the chain lubrication system is still not working after
carrying out the above checks and associated meas-
ures you should contact your service agent.
Chain drive sprocket
TheclutchdrumisttedwithaSpursprocket(thechain
sprocket is welded on the drum).
Regularly check the degree of wear on the drive
sprocket.
Replace if wear is excessive. Replace the drive sprock-
et whenever you replace the chain.
Checking wear on cutting equipment
Check the chain daily for:
● Visiblecracksinrivetsandlinks.
● Whetherthechainissti󰀨.
● 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.
Bar
Check regularly:
● Whether there are burrs on the edges of the bar.
Removethesewithaleifnecessary.
● Whether the groove in the bar has become badly
worn.
Replace the bar if necessary.
ADJUSTMENT OF DEPTH GAUGE SETTING
● Thecuttingteethshouldbenewlysharpenedbefore
adjusting the depth gauge setting. We recommend
that you adjust the depth gauge setting every third
time you sharpen the cutting teeth.
NOTE! This recommendation assumes that
the length of the cutting teeth is not reduced
excessively.
● Youwillneedaatleandadepthgaugetool.We
recommend that you use our depth gauge tool to
acheive the correct depth gauge setting and bevel
for the depth gauge.
● Placethedepthgaugetooloverthechain.Detailed
information regarding the use of the depth gauge
tool, will be found on the package for the depth
gaugetool. Usethe atleto leo󰀨 thetip ofthe
depth gauge that protrudes through the depth gauge
tool.Thedepthgaugesettingiscorrectwhenyouno
longerfeelresistanceasyoudrawthelealongthe
depth gauge tool.
TENSIONING THE CHAIN
WARNING!Aslack chainmay jumpo󰀨 and
cause serious or even fatal injury.
WARNING! Always wear approved protective
gloves.Evenanon-movingchaincancause
serious cuts to yourself or persons you bump
into with an exposed chain.
Themoreyouuseachainthelongeritbecomes.Itis
therefore important to adjust the chain regularly to take
up the slack.
Check the chain tension every time you refuel.
NOTE!Anewchainhasarunning-in period
during which you should check the tension
more frequently.
LUBRICATING CUTTING EQUIPMENT
WARNING!Poorlubricationofcuttingequip-
ment 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owcharacteristicsregardlessof
whether it is warm summer or cold winter weather.
Filling with chain oil
● All our chain saws have an automatic chain lubri-
cationsystem.Onsomemodelstheoilowisalso
adjustable.
● The saw chain oil tank and the fuel tank are de-
signed so that the fuel runs out before the saw chain
oil.