English – 25
MAINTENANCE
Air filter
The air filter should be
cleaned regularly removing
dust and dirt to avoid:
• carburettor malfunction
• starting problems
• reduced engine power
• unnecessary wear to
engine parts
• abnormal fuel
consumption
Clean the filter after every
25 hours or more regularly
if operating conditions are
exceptionally dusty.
Cleaning the air filter
Dismantle the air filter
cover and remove the air
filter. Wash in clean, warm
soapy water. Ensure that the
filter is dry before refitting.
An air filter used for a long
period of time can never be
cleaned completely.
Therefore it is necessary to
replace the filter from time
to time with a new filter. A
damaged air filter must
always be replaced.
Cooling system
To maintain as low an
operating temperature as
possible the engine is
equipped with a cooling
system. The cooling system
consists of:
1. An air intake on the
starter unit.
2. Cooling fins on the
flywheel.
3. Cooling fins on the
cylinder
4. Cylinder cover (leads cold
air onto the cylinder).
Clean the cooling system
using a brush at least once a
week, in difficult conditions
more often. A dirty or
blocked cooling system leads
to the engine overheating
resulting in damage to the
cylinder and piston.
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2
3
4
RS51
RS51
RS
GR
GR41/50
RS44
GR41/50
RS44
Angle gear
The angle gear is filled
with a sufficient quantity
of grease at the factory.
However, before using the
machine you should check
that the angle gear is filled
to 3/4 with grease. Use
JONSERED special grease.
Normally, the grease does
not need to be changed
except when the angle gear
is repaired.
Muffler
NOTE! Some mufflers are fitted with a catalytic converter. See
“Technical data” to see whether you clearing saw is fitted with a
catalytic converter.
The muffler is designed to
dampen the noise level and
to direct the exhaust fumes
away from the user. The
exhaust fumes are hot and
can contain sparks, which
can result in fire if the
exhaust fumes are directed
towards a dry and
inflammable material. Some
mufflers are equipped with a
special spark arrest screen. If
your machine is fitted with
this type of screen it should
be cleaned regularly. This is
done using a wire brush. On
mufflers without a catalytic
converter the screen should
be cleaned weekly, or
replaced if necessary. On
mufflers fitted with a
catalytic converter the
screen should be checked
and cleaned monthly. If the
screen is damaged it should
be replaced. If the screen is frequently blocked, this can be a
sign that the function of the catalytic converter is impaired.
Contact your dealer to inspect the muffler. A blocked screen
will cause the engine to overheat resulting in damage to the
cylinder and piston. Also see under “Maintenance”.
NOTE! Never use a machine with a defective muffler.
RS51
GR41/50
RS44
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