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16 – English
MAINTENANCE
Cleaning
External cleaning
• Clean the machine daily by rinsing it with clean water after
the work is finished.
Cooling air intake
• Clean the cooling air intake when needed.
Spark plug
• If the machine is low on power, difficult to start or runs
poorly at idle speed: always check the spark plug first
before taking other steps.
• Ensure that the spark plug cap and ignition lead are
undamaged to a
void the risk of electric shock.
• If the spark plug is dirty, clean it and at the same time
chec
k that the electrode gap is 0.5 mm. Replace if
necessary.
These factors cause deposits on the spark plug electrodes,
which ma
y result in operating problems and starting
difficulties.
• An incorrect fuel mixture (too much or incorrect type of
oil).
• A dirty air filter.
Functional inspection
General inspection
• Check that nuts and screws are tight.
Blades
Replacing the blades
The blades have integrated belt pulley halves and are to be
changed in pairs.
• Loosen the bar nuts one turn anticlockwise.
• Screw the belt adjuster a few turns anticlockwise.
• This will position the drive belt in a more favourable
position with regard to assemb
ling the new blades. The
drive belt is not clamped so easily.
• Dismantle the old blades by loosening the centre nut.
• Check the drive belt for wear. See instructions under the
heading "Belt dr
ive".
• Position the blades on each side of the cutting arm. Make
sure that the holes f
or both guide pins in the drive belt
halves are aligned so that they correspond with the holes
in the washer, and the nut too. Now fit the bolt and washer
unit with guide pins.
• Tighten the drive belt. See instructions under the heading
"Belt dr
ive".
NOTICE! A dirty or blocked air intake results in the machine
o
verheating which causes damage to the piston and
cylinder.
NOTICE! Always use the recommended spark plug type!
Use of the wrong spark plug can damage the piston/
cylinder.
NOTICE! It is very important that the blades rotate when the
nut is tightened. This is to ensure that the belt is not
clamped between the integrated drive belt halves on the
blades when the blades/drive belt are pulled together with
the nut. Ideally this is done alternately, i.e. tighten a little,
rotate a little and repeat until the blades are secured.