Maintenance - Scheppach MFH3300-4P Traduction Du Manuel D'origine

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
plug.
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, otherwise the engine
will overheat because of too much friction.
Regular checks
Keep in mind that following specifications relate to normal usage.
Owing to circumstances (longer periods of daily work, severe dust
exposure, etc.), the specified intervals will become correspondingly
shorter.
• Before start of work and after refueling
Check if cutting tools are seated securely, general view
inspection, sharpen cutting blade (also, if necessary).
• Weekly inspection:
Lubrication of gear (also, if necessary).
• If necessary:
Retighten accessible fastening screws and nuts. You
will avoid excessive wear and tear and damages of the
tool, when you follow the instructions in this manual.
The user is responsible for all damages caused by non-
compliance with instructions in this manual. This also
applies to non-authorized modifications of the tool, use of
non-authorized spare parts, accessories, working tools,
unrelated and not intended use, secondary damages
due to use of faulty components.
Wear Parts
Even when used in the intended way, some components
are subject to normal wear. They have to be replaced
depending on the kind of duration of usage. These parts
include, among others, the cutting tool and the retaining
disk.
Replacing the line spool/cutting line Fig. 24-29
1. Pull off the line guard cap from the line spool (5) by
forcefully pressing between the retaining plates.
2. Remove the spool with line remaining and the
compression spring.
3. Remove the used up spool.
4. Take the new line spool and pull out 10 cm at both
lines each.
5. Now, place the line spool (5) on the tapered spring,
and guide both lines each through the round metal
lugs at the line spool housing.
6. Then place the spool cover on the new line spool (5).
Turn it so that the plates of the spool cover are pushed
with the springs in the line spool housing.
7. Now, press the spool cover together with the line
spool, until it engages in the line spool housing.
8. The knife (A) in the protective hood (18) shortens the
trimming line to the correct length, when the engine
starts again.
Grinding the safety hood blade
The safety hood blade can become blunt over time.
• When you notice this, undo the screw holding the
safety hood blade on the safety hood.
• Clamp the blade in a vise.
• Sharpen the blade with a flat file and make sure that
the angle of the cutting edge is not altered in the
process. File in one direction only.
Replacing and resharpening the cutting blade at the
end of the mowing season always resharpen the cutting
blade or, if required, replace the cutting blade with a new
one.
Unbalanced blades will cause the brush cutter to vibrate
violently-risk of accident!
Change and clean the spark plug Fig. 30-31
Check the spark plug air gap at least once a year or
when the engine starts poorly. The correct gap between
ignition flag and ignition contact is 0.25"/0.63 mm.
• Wait until the engine has cooled down completely.
• Pull the spark plug cap off the spark plug, and use the
supplied spark plug wrench to remove the spark plug
by turning.
• When the electrode is severely worn out or reveals a
strong incrustation, the spark plug must be replaced
with an equivalent plug.
• A strong incrustation of the spark plug can be caused
by: Amount of oil is too high in the gasoline mix, poor
oil quality, old gasoline mix, or plugged up air filter.
• Screw the spark plug by hand completely into the
thread. (Avoid jamming it)
• Use the supplied spark plug wrench to tighten the
spark plug.
• When using a torque wrench, the tightening torque is
12-15 Nm.
• Plug the spark plug socket correctly on the plug.
Clean the air filter Fig. 32-35
Soiled air filters reduce the engine power by supplying
too little air to the carburetor. Dust and pollen plug up
the pores of the filter made of foamed plastic. Regular
checks are therefore essential.
• Unclip the air filter cover and remove the sponge filter
element.
• To avoid objects falling into the air tank, replace the air
filter cover.
GB 33