Jonsered 2141 - Manual (Page 32)

32
– English
MAINTENANCE
Cooling system
To obtain the lowest possible running temperature the saw is
equipped with a cooling system.
The cooling system
consists of:
1. Air intake on the starter
unit.
2. Air guide plate.
3. Fan blades on the
flywheel.
4. Cooling fins on the
cylinder.
5. Cylinder cowling
(supplies cold air over
the cylinder).
Clean the cooling system with a brush once a week, more often
in demanding conditions. A dirty or blocked cooling system
results in the saw overheating which causes damage to
piston and cylinder.
NOTE! The cooling system of chain saws that are fitted with a
catalytic converter must be cleaned daily. This is particularly
important on saws with catalytic converters, because the
higher working temperature of the exhaust demands efficient
cooling of the engine and the catalytic converter unit.
Centrifugal cleaning ”Turbo”
Centrifugal cleaning means
the following:
All air to the carburettor is
carried through the starter.
Dirt and dust is centrifuged
away by the cooling fan.
IMPORTANT! In order to
keep the function of the
centrifugal cleaning, a
continous maintenance and
care must be made.
• Clean the air intake to the
starter, the fan wings of the
flywheel, the space around
the flywheel, inlet pipe and
carburettor space.
Winter use
During winter time, snow and cold weather can cause running
problems, such as:
• Too low engine temperature.
• Icing of the air filter and freezing of the carburettor.
Therefore some special measures are required:
• Partly reduce the air inlet of the starter and by doing that
increase the engine temperature.
• Preheat the intake air to the carburettor by using the heat from
the cylinder.
Temperature 0°C (32°F) or
colder:
The cylinder cover is made so
it can be adjusted for running in
cold weather. Open the winter
flap so that preheated air from
the cylinder can pass into the
carburettor area preventing for
instance icing of the air filter.
For temperatures below -5°C
(23°F) and/or in snow
conditions there is also:
• a special cover (A) for the
starter housing,
• a winter plug (B) for the air
intake that is fitted as shown.
These reduce the air flow and
prevent large amounts of snow
from being sucked into the
carburettor chamber. NOTE!
When the winter plug is fitted
the winter flap must be open.
IMPORTANT! If the temperature rises above -5°C (23°F) or 0°C
(32°F) respectively the saw MUST be restored to its normal
settings. Otherwise there is a risk of overheating, which can
cause severe engine damage.
IMPORTANT! Any maintenance other than that described in this
manual must be carried out by your servicing dealer.
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The oil pump is adjustable.
Adjustments are made by
turning the screw using a
screwdriver or combination
spanner. The saw is supplied
from the factory with the screw
set to position 2. Turning the
screw clockwise will reduce
the oil flow and turning the
screw anti-clockwise will
increase the oil flow.
Adjustment of the oil pump
– +
1
2
3
WARNING! The engine must not be running
when making adjustments.
!
Recommended settings:
Bar 13"-15": Position 1
Bar 15"-18": Position 2
Bar 18"-20": Position 3
1
2
5
4
3
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