Scheppach MFH440-LI20PROS Original Bedienungsanleitung Seite 44

11.4.1 Oil supply control
Always make sure the automatic oiler system is
working properly. Ensure that the chainsaw oil tank
is always filled (21).
During sawing work, the rail and the saw chain (19)
must always be oiled sufficiently in order to reduce
friction on the chainsaw blade (20).
The chainsaw blade (20) and the saw chain (19) must
never be without oil.
If you use the saw dry or with too little oil, the cutting
performance reduces, the service life of the chain-
saw blade (20) is reduced, the saw chain (19) be-
comes blunt quicker and the rail wears a great deal
due to overheating. You can that there is too little oil
if smoke forms or the guide rail discolours.
To check the saw chain lubrication, hold the chain-
saw with the saw chain (19) over a sheet of paper
and give it full throttle for a few seconds.
The oil quantity can be checked on the paper.
The saw chain (19) must always fling a small amount
of oil. After a few seconds, a light oil trail must be
visible. Always ensure that there is enough oil in the
chainsaw oil tank (21) for saw chain lubrication.
11.4.2 Precautionary measures for the sawing
work
• Never stand directly under the branch that you want
to saw off!
• Possible risk of injury caused by falling branches
and catapulting pieces of wood. In general, it is rec-
ommended to set the pole-mounted pruner (6) at
an angle of 60° to the branch.
• Hold the device firmly with both hands during the
cutting process and always ensure that you are in a
balanced position and have secure footing.
• Never use the device with only one hand! The loss
of control of your tool can cause serious injury or
death. Never work on a ladder, a tree branch or oth-
er unstable surfaces.
• Do not saw strong branches in one cut, always in
several steps.
• Place the saw chain (19) on the branch to be cut.
• Apply light pressure to move the device, but do not
overload the engine.
• Before cutting, clear the work area of obstructive
branches and undergrowth. Then, keep the area
clean, on which branches could fall after cutting
and remove any obstacles there, if necessary.
• Always keep the work area clear, remove the cut
branches immediately.
• Pay attention to your location, the wind direction
and the possible felling direction of the branches.
• Be prepared for fallen branches to kick back.
• Place all other tools and devices at a safe distance
from the branches to be cut, but not in the with-
drawal area.
44 | GB
Always monitor the condition of the tree.
Look for rot and decay in the roots and branches. If
they are rotten inside, they can break off and fall un-
expectedly while cutting.
Also watch out for broken and dead branches that
could come loose due to the vibrations and fall on
you.
For very thick or tough branches, first make a small
cut beneath the branch before working from top to
bottom to prevent it breaking off.
Basic cutting technique
Heavy branches break off easily when sawing and
long strips of bark break off from the trunk which
causes lasting damage to the tree. You can signifi-
cantly reduce this risk with the following cutting tech-
nique:
• First saw the branch about 10 cm away from the
trunk on the underside of the branch.
• Make another cut about 15 cm to the trunk from
above.
• Keep sawing until the branch breaks off. There is
now no longer a risk of damaging the bark on the
trunk.
• Finally, remove the remaining branch stump with a
clean cut from above along the trunk.
• To keep the damage to the tree to a minimum, we
also recommend sealing the cutting area with graft-
ing wax.
Dangers from reactive forces
Reactive forces occur during the operation of the saw
chain (19). The forces that are to be applied to the
wood act against the operator. They occur when the
moving saw chain (19) comes into contact with a solid
object such as a branch or is jammed. These forces
can lead to a loss of control and injuries.
Understanding how these forces occur can help you
avoid the moment of shock and loss of control.
This saw is designed so that the kick-back effects are
not as noticeable as with conventional chainsaws.
Nevertheless, always make Container you have a
firm grip and secure footing so that you can keep con-
trol of the tool in case of doubt.
The most common effects are:
• Kick-back
• Recoil
• Kick-back
Kick-back
Kick-back can occur if the running saw chain (19)
strikes a solid object on the upper quarter of the
chainsaw blade (20) or becomes jammed.
The cutting force of the saw chain (19) exerts a ro-
tational force on the saw in the opposite direction to
the saw chain movement. This leads to an upward
movement of the chainsaw blade (20).
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