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– Reduce the tension by turning the side chain tensioner
counterclockwise until the chain can move freely along
the guide bar.
– Ensure that the drive links remain in the groove and that
the distance between the underside of the guide bar and
the chain (a) is between 0.04 in. (1 mm) and 0.08 in.
(2 mm).
► Once the chain is properly tensioned, lift the guide bar tip
and tighten the nut to secure the chain sprocket cover.
► Finally, ensure that the distance between the underside of
the guide bar and the chain (a) is between 0.04 in. (1 mm)
and 0.08 in. (2 mm).
NOTICE
Always release tension on the chain after finishing work. The
chain contracts as it cools down. If it is not slackened, it can
damage the drive shaft and bearings. Properly re-tension
the chain before using the pole pruner again.
14.5 Lubricating the Saw Chain and Guide Bar
14.5.1 Bar and Chain Lubricant
WARNING
Never operate your pole pruner without bar and chain
lubrication. If the chain runs dry, the cutting attachment will
be damaged beyond repair within a very short time. A
damaged chain may break, resulting in severe or fatal
personal injury. Always check chain lubrication and the oil
level in the tank before starting work and periodically during
work.
WARNING
Never use waste oil to lubricate your saw chain and guide
bar. Repeated contact with waste oil can cause skin cancer.
Moreover, waste oil is environmentally harmful.
Bar and chain oil lubricates and cools the rotating saw chain.
The service life of the chain and guide bar depends on the
quality of the lubricant. It is therefore essential to use only a
specially formulated chain lubricant.
30
► For automatic and reliable lubrication of the chain and
guide bar, use only an environmentally compatible quality
chain and bar lubricant. STIHL recommends using rapidly
biodegradable STIHL BioPlus.
NOTICE
Biodegradable chain oil must be resistant to aging, since it
will otherwise quickly turn to resin. This results in hard
deposits that are difficult to remove, especially in the area of
the chain drive and chain. It may even cause the oil pump to
seize.
NOTICE
Waste oil does not have the necessary lubricating properties
and is unsuitable for chain lubrication.
14.5.2 Filling the Chain Oil Tank
To fill the chain oil tank:
► Switch off the pole pruner, @ 16.2.
► Remove the battery, @ 15.2.
► Position the pole pruner on a level surface with the oil filler
cap facing upwards.
► Clean the area around the oil filler cap with a slightly
dampened cloth.
► Turn the oil filler cap counter-clockwise until it can be
removed.
► Remove the oil filler cap and fill the tank with chain oil.
► Take care not to spill chain oil while refilling the tank.
14 Assembling the Pole Pruner
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