Makita UC3020A Instruction Manual page 16

0.5 mm
a
a
a
min.
3 mm
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16
Cleaning the chain saw
Clean the saw regularly with a clean rag. The handles, in particular, must be
kept free of oil.
Checking the plastic housing
Carry out regular visual inspections of all parts of the housing. Should any
parts be damaged, have them repaired immediately and properly in a MAKITA
specialist repair shop.
Sharpening the saw chain
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CAUTION:
• Always withdraw the mains plug and wear safety gloves when performing
work on the saw chain.
Sharpen the saw chain when:
- Mealy sawdust is produced when damp wood is cut;
- The chain penetrates the wood with difficulty, even when heavy pressure
is applied;
- The cutting edge is obviously damaged;
- The saw pulls to the left or right in the wood. The reason for this
behaviour is uneven sharpening of the saw chain, or damage to one side
only.
Sharpen the saw chain frequently, but remove only a little material each
time.
Two or three strokes with a file are usually sufficient for routine resharpening.
When the saw chain has been resharpened several times, have it sharpened
in a MAKITA specialist repair shop.
Sharpening criteria:
- All cutters must be of equal length (dimension a). Cutters of differing
length prevent the chain from running smoothly, and may cause the chain
to break.
- Do not sharpen the chain once a minimum cutter length of 3 mm has
been reached. A new chain must then be fitted.
- The chip thickness is determined by the distance between the depth
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gauge (round nose) and the cutting edge. The best cutting results are
0.5 mm
obtained with a distance of 0.5 mm between cutting edge and depth
gauge.
WARNING:
• An excessive distance increases the risk of kick-back.
- The sharpening angle of 30 ° distance must be the same on all cutters.
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Differences in angle cause the chain to run roughly and unevenly,
accelerate wear, and lead to chain breaks.
- The side plate angle of the cutter of 80 ° is determined by the depth of
penetration of the round file. If the specified file is used properly, the
correct side plate angle is produced automatically.
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