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4.4- chain tension adjustment
1. To ensure chain rotates freely, rotate the saw chain by glove-protected hand so that the chain fits
the sprocket (d) and the guide bar (2).
2. Turn the tensioning knob (15) clockwise by hand until the saw chain is correctly tensioned.
Do not tension the chain too tightly.
Note: The saw chain has proper tension when:
When cold, it should be possible to lift the chain in the middle of the guide bar by approx 5 mm.
When warm, the saw chain will expand and slacken and there is a danger of it jumping off the rail /
groove (i) altogether. Re-tension if deemed necessary.
If the saw chain is re-tensioned when hot, it must be loosened again when the sawing work has been
completed. Otherwise, the contraction which takes place as the chain cools would result in
excessively high tension.
A new saw chain requires a running-in period of approx. 5 minutes.
Chain lubrication is very important at this period.
After running-in, check chain tension and re-tension if necessary
4.5- Chain Tension Control
Control the chain tension regularly because new chains lengthen during use.
When in COLD STATE: the saw chain must adhere to lower side of the guide bar, but it must be able
to be pulled by gloved hand.
When reached OPERATING TEMPERATURE: the saw chain lengthens and it slacks.
Parts of the saw chain must not rise from the notch on the lower side of the guide bar – saw
chain could jump out. Tighten the saw chain more.
4.6- Guide bar
The guide bar (2) is subjected to important wear particularly at its tip and lower part.
To avoid one-sided wear or uneven wear of the guide bar, turn it at every chain sharpening or change.
4.7- Sprocket
The sprocket (d) is also subjected to rapid wear.
If deep wear marks appear on the teeth, replace the drive gear sprocket.
A worn-out sprocket will shorten the lifespan of the chain.
The sprocket should be changed by a specialist or authorized service centre, to avoid any hazard.
4.8- Chain guard (protective sheath)
Upon completion of your task, place the chain guard sheath (16) on the chain and guide chain.
Place chain guard whenever transporting the chainsaw from one location to another.
4.9- Filling the oil tank (Fig.5)
Clean the oil filler cap (4) and its circumference before opening it,
so as to avoid impurities getting inside the tank.
Fill in the tank (through the opening).
Screw the oil tank cap (4) and wipe away any oil spills.
In order to lubricate the saw chain sufficiently, there must be enough
saw chain oil in the tank at all times. The oil level can be checked
through the viewing window / oil level gauge (14).
The oil level may not be below "MIN".
Fig.5
Note: Never use the chainsaw when the oil level falls below the "MIN." mark.
It is recommended to top up with oil when only approx. 5 mm of oil is visible at the lower rim of the
oil gauge (14).
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