Husqvarna 1153136-26 User Manual

Page of 36
GENERAL SAFETY PRECAUTIONS
English
 –
 15
1153136-26 Rev.1 2009-12-29
445e, 450e
Release the knob by folding it out. (30)
Turn the knob anti clockwise to loosen the bar cover. 
(31)
Adjust the tension on the chain by turning the wheel 
down (+) for tighter tension and up (-) to loosen the 
tension. (32)
Tighten the bar clutch by turning the knob clockwise. 
(33)
Fold the knob back in to lock the tensioning. (34)
Lubricating cutting equipment
Chain oil
Chain oil must demonstrate good adhesion to the chain 
and also maintain its flow characteristics regardless of 
whether it is warm summer or cold winter weather.
As a chain saw manufacturer we have developed an 
optimal chain oil which, with its vegetable oil base, is also 
biodegradable. We recommend the use of our own oil for 
both maximum chain life and to minimise environmental 
damage. If our own chain oil is not available, standard 
chain oil is recommended.
Never use waste oil!  Using waste oil can be dangerous 
to you and damage the machine and environment.
Filling with chain oil
All our chain saws have an automatic chain lubrication 
system. On some models the oil flow is also 
adjustable.
The saw chain oil tank and the fuel tank are designed 
so that the fuel runs out before the saw chain oil.
However, this safety feature requires that you use the 
right sort of chain oil (if the oil is too thin it will run out 
before the fuel), and that you adjust the carburetor as 
recommended (a lean mixture may mean that the fuel 
lasts longer than the oil) and that you also use the 
recommended cutting equipment (a bar that is too 
long will use more chain oil).
Checking chain lubrication
Check the chain lubrication each time you refuel. See 
instructions under the heading Lubricating the bar tip 
sprocket.
Aim the tip of the bar at a light coloured surface about 
20 cm (8 inches) away. After 1 minute running at 3/4 
throttle you should see a distinct line of oil on the light 
surface.
If the chain lubrication is not working:
Check that the oil channel in the bar is not obstructed. 
Clean if necessary. (35)
Check that the groove in the edge of the bar is clean. 
Clean if necessary. (36)
Check that the bar tip sprocket turns freely and that 
the lubricating hole in the tip sprocket is not blocked. 
Clean and lubricate if necessary. (37)
If the chain lubrication system is still not working after 
carrying out the above checks and associated measures 
you should contact your service agent.
Chain drive sprocket
The clutch drum is fitted with one of the following drive 
sprockets:
A   Spur sprocket (the chain sprocket is welded on the 
drum)
B   Rim sprocket (replaceable) (38)
Regularly check the degree of wear on the drive sprocket. 
Replace if wear is excessive. Replace the drive sprocket 
whenever you replace the chain.
Needle bearing lubrication
Both versions of sprockets have a needle bearing on the 
drive shaft, which has to be greased regularly (once a 
week). CAUTION! Use a high-quality bearing grease or 
engine oil.
See instructions under the heading Maintenance, Needle 
bearing lubrication.
Checking wear on cutting equipment
Check the chain daily for:
Visible cracks in rivets and links.
Whether the chain is stiff.
Whether rivets and links are badly worn.
Replace the saw chain if it exhibits any of the points 
above.
!
WARNING! Poor lubrication of cutting 
equipment may cause the chain to snap, 
which could lead to serious, even fatal 
injuries.
IMPORTANT! When using vegetable based saw chain 
oil, dismantle and clean the groove in the bar and saw 
chain before long-term storage. Otherwise there is a risk 
of the saw chain oil oxidizing, which will result in the saw 
chain becoming stiff and the bar tip sprocket jamming.