Maintenance - Scheppach MFH4200-4BP Translation Of Original Instruction Manual

• 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 chainsaws.
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
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

INJURY WARNING: Always wear protective
gloves when working on or around cutting tools.
Before performing any maintenance or cleaning
work, always turn off the engine and pull out the
spark boot
1. Do not spray the unit with water. It damages the
engine.
2. Clean the unit with a cloth, hand brush, etc.
3. Use a moist piece of cloth to clean the plastic
parts. Do not use any cleaning agents, solvents, or
sharp objects.
4. During the course of work, wet grass and weed
wraps around the drive shaft below the cutting
guard for technical reasons. Remove this, other-
wise the engine will overheat because of too much
friction. Fig. 45
Regular checks
Keep in mind that following specifications relate to
normal usage. Owing to circumstances (longer pe-
riods of daily work, severe dust exposure, etc.), the
specified intervals will become correspondingly
shorter.
• Before starting work, after tank filling, after impact
or dropping:
Check the cutting tools for secure seating, general
visual check for cracks and damage.
Immediately replace damaged or blunt cutting
tools, even in the event of minor hairline cracks.
Sharpen cutting tools (also when required).
• Weekly inspection:
Lubrication of gear (also, if necessary).
• If necessary:
Retighten accessible fastening screws and nuts.
You will avoid excessive wear and tear and dam-
ages of the tool, when you follow the instructions
in this manual.
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