Translation
v1-2010
E
N
GLI
SH
SERVICE INSTRUCTIONS
1. Service instructions of the saw chain and the chain blade.
Sawing takes place effortlessly when the saw chain is sharpened correctly. The well sharpened saw chain
penetrates into the wood with a little of effort. It is very uneconomical to work with a dull or damaged saw
chain. Clean and check the saw chain and make sure that there are no splits in the chain joints and that all
the chain rivets are sound. Damaged or worn out chain must be replaced with a new one.
Use only special saw chain sharpening files! Remember the correct tension of the saw chain!
The saw chain has the following chain division: t = 0.325" (pic.G1)
For checking of the division, t = distance between 3 rivets divided by 2. (pic.G2)
Constant sharpening angle
30˚
(degrees)
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The angles must be the same for all the teeth of the saw chain. If angles vary, the saw chain will
move unevenly, it will wear down more quickly and it may even break.
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As these requirements can be fulfilled only after sufficient experience, please do use filing guide!
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All the cutting teeth must be of equal length. If the teeth are of uneven lengths, also the tooth
heights are uneven and this will cause uneven rotation of the saw chain, which eventually causes
splits in the chain.
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All the teeth must be filed according to the shortest tooth. This could be time consuming, and the
best way to do the job is to get it done in a workshop by means of an electric sharpening device.
(pic.G3)
Filing of the depth regulator
- depth regulator determines the penetration depth into the wood and thus the thickness of the chip. Depth
regulation distance becomes smaller along with filing. Check the depth regulation distance by means of a
reduction diagram. If required, file with a flat or triangular file.
The distance between the depth regulator and cutting edge is = 0.65 mm. When cutting coniferous trees, it
could be 0.2 mm bigger, except when the outside temperature is below zero degrees centigrade. (pic.G4)
After sharpening:
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Clean the saw chain thoroughly, remove any stuck chips and filing dust and submerge the chain
into oil bath.
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When the saw chain is not used while:
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Clean the chain with a brush and store it in oil/paraffin oil bath.
Servicing the blade
Reverse the blade and file from its side, and clean the groove when necessary.
Replacement and tightening of the saw chain
Turn off the motor before performing maintenance work to the saw chain!
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Lower the discharge conveyor to the ground by means of a winch.
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Loosen the hex screws at the front of the saw bar cover and turn the cover open.
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To tighten the saw chain loosen the retaining nuts (pic.G5) of the saw bar and turn the tightening
bolt clockwise. (pic.G6)
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If you need to remove the saw chain, turn the tightening bolt (pic.G6) counter-clockwise until the
chain becomes loose.
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The chain should be tightened, so that it would not hang loose under the saw bar.
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Finally retighten the retaining nuts of the saw bar. (pic.G5)
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Check the chain tightness regularly.
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