Scheppach MPT3400-4PGE Originalanleitung Seite 37

10. Maintenance
INJURY 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)
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, 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 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 damages of the
tool, when you follow the instructions in this manual.
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 (~25°). File in one direction only.
plug.
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!
Lubricate angle transmission
Lubricate with lithium-based grease. Remove the screw
and put in the grease, turning the shaft manually until
grease emerges, then replace the screw.
Attention! Fill only a small amount of grease. Do not
overfill.
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.
• Wash the filter element in warm soap water, rinse and
allow drying naturally.
Important: Never clean the air filter with petrol or
inflammable solvents.
In order not to shorten the service life of the engine, a
damaged air filter must be replaced at once.
GB 37