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kickback reduction when properly maintained.
For smooth and fast cutting, maintain the chain properly. The chain requires
sharpening when the wood chips are small and powdery. The chain must be
forced through the wood during cutting or the chain will cut to one side. During
maintenance of the chain, consider the following:
Improper filing angle of the side plate can increase the risk of severe kickback.
Raker (depth gauge) clearance.
Too low increases the potential for kickback.
Not low enough decreases cutting ability.
If the cutter teeth hit hard objects such as nails and stones, or are abraded
by mud or sand on the wood, have an authorised service centre sharpen the
chain.
Note:
Inspect the drive sprocket for wear or damage when replacing the chain.
If signs of wear or damage are present in the areas indicated, have the drive
sprocket replaced by an authorised service centre.
Note:
If you do not fully understand the correct procedure for sharpening the
chain after reading the instructions that follow, have the saw chain sharpened by
an authorised service centre or replace with a recommended low-kickback chain.
SHARPENING THE CUTTERS
See Figures 48-51.
Be careful to file all cutters to the specified angles and to the same length, as fast
cutting can only be obtained when all cutters are uniform.
WARNING
The saw chain is very sharp. Always wear protective gloves when performing
maintenance to the chain to prevent serious personal injury.
i.
Tension the chain prior to sharpening.
ii. Use a 5/32 in. (4 mm) diameter round file and holder. Do all of your filing at
the midpoint of the bar.
iii. Keep the file level with the top plate of the tooth. Do not let the file dip or rock.
iv. Use light but firm pressure. Stroke towards the front corner of the tooth.
v. Lift the file away from the chain tooth on each return stroke.
vi. Put a few firm strokes on every tooth. File all left hand cutters in one direction.
Then move to the other side and file the right hand cutters in the opposite
direction.
vii. Remove filings from the file with a wire brush.
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