Jonsered 70C 用户手册

14 – 

English

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 has a vegetable oil base. 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.

In areas where oil specifically for lubrication of saw chains is 
unavailable, ordinary EP 90 transmission oil may be used.

Never use waste oil!  This is dangerous for yourself, the 
machine and the environment.

•

All our chain saws have an automatic chain lubrication 
system. On some models the oil flow is also adjustable.

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The sizes of the chain oil tank and fuel tank have been 
chosen so that the engine will run out of fuel before 
running out of oil. This means that you should never run 
with a dry chain. 

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 carburettor as recommended 
(a weak 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). 
The above conditions also apply to chain saw models with 
an adjustable oil pump.

•

Check the chain lubrication each time you refuel. 

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.

•

Check that the groove in the edge of the bar is clean. 
Clean if necessary.

•

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.

If the chain lubrication system is still not working after carrying 
out the above checks and associated measures you should 
contact your service agent.

Lubricate the bar tip sprocket each time you refuel. Use the 
special grease gun and a good quality bearing grease.

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)

Both versions have a needle bearing on the drive shaft, which 
has to be greased regularly (once a week). CAUTION! Use 
only high quality bearing grease or engine oil.