Maintenance - Scheppach MFH5200-4P Bedienungs- Und Wartungsanleitung

Clear the work area before cutting interfering branch-
es and undergrowth. Then you create a retreat area,
far from the spot where the cut branches fall on, and
remove any obstacles there. Keep the work area
clean, remove the cut branches immediately. Pay at-
tention to your point, wind direction and the possible
direction of fall of the branches. Be prepared that
fallen branches can strike back. Place all other tools
and equipment at a safe distance from the branches
to be cut, but not in the retreat area.
Always observe 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
down unexpectedly during cutting.
You could also attend by fractured and dead branch-
es out, which is solved by the shake and fall on you.
For very thick or heavy branches you first make a
small incision below the branch before you work from
the top down to avoid chipping.
Basic cutting technique
Heavy branches break off easily when sawing. They
tear long strips of bark away from the trunk, which
damages the tree sustainably. The following section
technique can significantly reduce this risk:
• Saw the first branch about 10 cm from the trunk.
• Put in about 15 cm from the base of the top of a
further section.
• Saw until the branch breaks. The risk of injury on
the trunk is no.
• Finally, remove with a clean cut from the top of the
trunk along the remaining.
• Thus, the damage to the tree are kept as low as
possible, we recommend the interface additionally
to seal with grafting wax.
Hazards by reactive forces
Reactive forces occur during operation of the saw
chain. The forces which are applied to the wood are
against the operator. They occur when the moving
chain comes into contact with a fixed object such as
a branch or is pinched. These forces can lead to a
loss of control and injury.
Understanding the origin of these forces can help
you to avoid the scare and the loss of control. This
saw is designed to make the return effects are not as
noticeable as with traditional chain saws.
Always still keep a firm grip and a good level to main-
tain control of the tool in doubt.
The most common effects are:
• setback
• recoil,
• retreat
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Kickback
The setback can occur when the moving saw chain
meets at the upper quarter of the guide rail on a solid
object or is pinched.
The cutting force exerted on the chain from the saw,
a rotational force in the opposite direction to the
chain travel. This leads to an upward movement of
the guide rail.
Avoid kickback
The best protection is to avoid situations that lead to
setbacks.
1. Keep the position of the upper guide rail always
in mind.
2. Leave this place never come into contact with an
object. Cut anything with it. Be especially careful
near wire fences and cutting small, hard knots, in
which the chain can easily pinch.
3. Cut only one branch at a time.
Withdrawal
The withdrawal occurs when the chain on the under-
side of the bar suddenly stuck because it is jammed
or encounters a foreign object in the wood. The chain
then pulls the saw forward. The withdrawal often
happens when the chain is not running at full speed
when in contact with the wood.
Avoid withdrawal
Be aware of the forces and situations that can lead
to jamming of the chain on the underside of the bar.
Always start with running at full speed chain to cut.
Recoil
The recoil occurs when the chain on top of rail sud-
denly stuck because it is jammed or encounters a
foreign object in the wood. The chain can jerkily hold
the saw against the operator. Rebounds happen of-
ten if the top rail is used for cutting.
Avoid recoil
Be aware of the forces and situations that can lead to
jamming of the chain on top of rail.
Do not cut more than one branch at a time.
Do not tilt the rail to the side when you pull them out
of a cutting gap, since the chain could get caught
otherwise.

10. Maintenance

WARNING: Always wear protective gloves when
working on or around cutting tools. For non-use,
transport or storage always attach the transport
guard to all cutting tools. Fig. 1 (14a, 15a, 17c)