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Excel 11790 - Operation and Maintenance; Automatic Lubrication and Chain Care; Chain Brake Function and Release; Sharpening and Starting Procedures

Excel 11790
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Checking the automatic lubrication
Before commencing work, check the automatic chain
lubrication and oil gauge. Switch on the chain saw and
hold it above the ground. Be careful not to allow the
chain saw to touch the ground. For safety reasons it is
best to keep a clearance of at least 20 cm. If you now
see growing traces of oil, the chain lubrication system is
working correctly. if there are no traces of oil at all, try
cleaning the oil outlet (Fig 2, C), the upper chain
tensioning borehole (E) and the oil duct, or contact your
Customer Service.
Chain lubricants
The service life of saw chains and guide bars depends
to a large extent on the quality of the lubricant used. Old
oil must not be used! Use only environment-friendly
chain lubricant. Store chain lubricant only in containers
which comply with the regulations.
Guide bar
The guide bar (7) is subjected to especially severe wear
and tear at the nose and the bottom. To avoid one-sided
wear and tear, turn the guide bar over every time when
you sharpen the chain.
Chain wheel
The chain wheel (16) is subjected to especially high
wear and tear. If you notice deep wear marks on the
teeth, the chain wheel must be replaced. A worn chain
wheel curtails the service life of the saw chain. Have the
chain wheel replaced by a specialist dealer or your
Customer Service.
Chain guard
The chain guard must be clipped onto the chain and
sword as soon as the sawing work has been completed
and whenever the chainsaw has to be transported.
Chain brake
In the event of kick-back, the chain brake (3) will be
actuated via the front finger guard. The front finger
guard is pushed forwards by the back of the hand and
this causes the chain brake to stop the chain saw, or
rather the motor, within 0.12 s (Fig 5, I).
Releasing the chain brake
(Fig 5)
To be able to use your chain saw again, you must
release the saw chain again. First switch off the
chainsaw. Then push the front finger guard (3) back
into the vertical position until it locks in place (Fig 5, H).
The chain brake is now fully functional again.
Sharpening the saw chain
You can have your saw chain sharpened fast and
correctly by specialist dealers, from whom you can also
obtain chain sharpening equipment to enable you to
sharpen the chain yourself. Please follow the
corresponding operating instructions.
Take care of your tools. Keep your tools sharp and
clean to enable you to work well and safely. Follow the
maintenance regulations and the
instructions for
changing tools
Starting up
Always wear safety goggles, ear muffs, protective
gloves and heavy-duty work clothes!
Use the saw only with approved extension cables with
the prescribed insulation and connections designed for
outdoor use (approved rubber-sheathed cables) which
fit the chainsaw plug. The chain saw is equipped with a
two-handed safety switch. The chainsaw works only
when one hand holds the front grip (2) and the other
hand actuates the switch on the rear grip (1) .
If the chainsaw does not run, the chain brake must be
released at the front finger guard (3). Be sure to read
the sections “Chain brake” and “ Releasing the chain
brake “ on this point.
After switching on, the chainsaw will run
immediately at high speed.
To switch off: Release either the ON/OFF switch (13)
on the rear grip or the other switch (2) on the rear grip.
The release of ON/OFF switch results the stop of the
chainsaw within 2sec., and heavy sparkling. This is
normal and safe for the proper operation of the
chainsaw.
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