Jonsered BC 2255 Service Manual
20 –
English
STARTING AND STOPPING
Check before starting
•
Check the blade to ensure that no cracks have formed at
the bottom of the teeth or by the centre hole. The most
common reason why cracks are formed is that sharp
corners have been formed at the bottom of the teeth while
sharpening or that the blade has been used with dull
teeth. Discard a blade if cracks are found.
the bottom of the teeth or by the centre hole. The most
common reason why cracks are formed is that sharp
corners have been formed at the bottom of the teeth while
sharpening or that the blade has been used with dull
teeth. Discard a blade if cracks are found.
•
Check that the support flange is not cracked due to fatigue
or due to being tightened too much. Discard the support
flange if it is cracked.
or due to being tightened too much. Discard the support
flange if it is cracked.
•
Ensure the locking nut has not lost its captive force. The
nut lock should have a locking force of at least 1.5 Nm.
The tightening torque of the locking nut should be 35-50
Nm.
nut lock should have a locking force of at least 1.5 Nm.
The tightening torque of the locking nut should be 35-50
Nm.
•
Check that the blade guard is not damaged or cracked.
Replace the blade guard if it is exposed to impact or is
cracked.
Replace the blade guard if it is exposed to impact or is
cracked.
Check that the trimmer head and trimmer guard are not
damaged or cracked. Replace the trimmer head or trimmer
guard if they have been exposed to impact or are cracked.
damaged or cracked. Replace the trimmer head or trimmer
guard if they have been exposed to impact or are cracked.
•
Never use the machine without a guard nor with a
defective guard.
defective guard.
•
All covers must be correctly fitted and undamaged before
you start the machine.
you start the machine.
Starting and stopping
Cold engine
Ignition: Set the stop switch to the start position.
Choke: Set the choke control (A) in the choke position.
Primer bulb: Press the air purge diaphragm (B) repeatedly
until fuel begins to fill the diaphragm. The diaphragm need not
be completely filled.
until fuel begins to fill the diaphragm. The diaphragm need not
be completely filled.
Decompression valve (C): Press the valve to reduce the
pressure in the cylinder and make starting easier. You should
always use the decompression valve when starting the
machine. Once the machine has started the valve will
automatically return to its original setting.
pressure in the cylinder and make starting easier. You should
always use the decompression valve when starting the
machine. Once the machine has started the valve will
automatically return to its original setting.
!
WARNING! The complete clutch cover and
shaft must be fitted before the machine is
started, otherwise the clutch can come loose
and cause personal injury.
shaft must be fitted before the machine is
started, otherwise the clutch can come loose
and cause personal injury.
Always move the machine away from the
refuelling area before starting. Place the
machine on a flat surface. Ensure the cutting
attachment cannot come into contact with
any object.
refuelling area before starting. Place the
machine on a flat surface. Ensure the cutting
attachment cannot come into contact with
any object.
Make sure no unauthorised persons are in
the working area, otherwise there is a risk of
serious personal injury. The safety distance
is 15 metres.
the working area, otherwise there is a risk of
serious personal injury. The safety distance
is 15 metres.
A
B
C