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It is advisable to fit the intake air prehea-
ting kit* if you use your saw in extremely
cold conditions (temperatures below
-10 °C /+14 °F, in powder or drifting
snow).
When fitted, the kit ensures that only
heated air is drawn in from around the
cylinder - it prevents air filter and
carburetor icing.
The rotary shutter for carburetor prehea-
ting must be fully open when the intake
air preheating kit is fitted.
If your saw is very cold (frost or ice on
machine), start the engine and keep it
at a high idle speed (with chain brake
disengaged) until it reaches normal
operating temperature.
The air filter may load up faster when
you use intake air preheating - clean it
more frequently.
In the event of engine running problems,
first check that conditions for use of
intake air preheating still apply.
* Special accessory
•
7XUQWKHEDURYHU -
every time you sharpen the chain -
and every time you replace the
chain -
this helps avoid one-sided wear,
especially at nose and underside
of the bar.
Regularly clean
oil inlet hole
oilway
bar groove.
•
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with scale on filing gauge* -
at nose of Duromatic bars -
in area used most for cutting
on Rollomatic bars.
Chain Pitch Minimum
type groove
depth
Rapid 3/8" 6.0 mm
If groove depth is less than specified:
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The drive link tangs will otherwise scrape
along the bottom of the groove -
the cutters and tie straps will not ride on
the bar rails.
* Special accessory
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2
3
1
143BA026 KN
46
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