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WARNINg:
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Check that the switch is in the STOP "0" position
before you work on the saw.
Use only a low-kickback chain on this saw. This fast-
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cutting chain provides kickback reduction when properly
maintained.
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For smooth and fast cutting, maintain the chain properly.
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The chain requires sharpening when the wood chips are
small and powdery, the chain must be forced through the
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wood during cutting, or the chain cuts to one side. During
maintenance of the chain, consider the following:
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Improper filing angle of the side plate can increase
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the risk of severe kickback.
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Raker (depth gauge) clearance.
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- Too low increases the potential for kickback.
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- Not low enough decreases cutting ability.
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If the cutter teeth hit hard objects such as nails and
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stones, or are abraded by mud or sand on the wood,
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have an authorised service centre sharpen the chain.
Note: Inspect the drive sprocket for wear or damage
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when replacing the chain. If signs of wear or damage are
present in the areas indicated, have the drive sprocket
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replaced by an authorised service centre.
NOTE: If you do not fully understand the correct
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procedure for sharpening the chain after reading the
instructions that follow, have the saw chain sharpened
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by an authorised service centre or replace with a
recommended low-kickback chain.
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SHARPENINg THE CuTTERS
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See Figures 48 - 51.
Be careful to file all cutters to the specified angles and
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to the same length, as fast cutting can only be obtained
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when all cutters are uniform.
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WARNINg:
The saw chain is very sharp. Always wear
protective gloves when performing maintenance
to the chain to prevent serious personal injury.
Tension the chain prior to sharpening. Refer to
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Adjusting The Chain Tension.
Use a 5/32 in. (4 mm) diameter round file and holder.
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Do all of your filing at the midpoint of the bar.
Keep the file level with the top plate of the tooth. Do
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not let the file dip or rock.
Using light but firm pressure. Stroke towards the front
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corner of the tooth.
Lift the file away from the chain tooth on each return
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stroke.
Put a few firm strokes on every tooth. File all left
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hand cutters in one direction. Then move to the other
side and file the right hand cutters in the opposite
direction.
Remove filings from the file with a wire brush.
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FI
HU CS RU
FI
HU CS RU
FI
HU CS RU
English
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HU CS RU
CAuTION:
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HU CS RU
A dull or improperly sharpened chain can cause
excessive engine speed during cutting, which may result
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HU CS RU
in severe engine damage.
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WARNINg:
Improper chain sharpening increases the
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potential of kickback.
WARNINg:
NO
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Failure to replace or repair a damaged chain can
cause serious injury.
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TOP PLATE FILINg ANgLE
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See Figure 52.
HU
CORRECT 30° – file holders are marked with guide
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marks to align file properly to produce correct top
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plate angle.
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LESS THAN 30° – for cross cutting.
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MORE THAN 30° – feathered edge dulls quickly.
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SIdE PLATE ANgLE
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See Figure 53.
CORRECT 80° – Produced automatically if you use
■
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HU CS
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the correct diameter file in the file holder.
HOOK – "Grabs" and dulls quickly; increases the
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HU CS
RU RO
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potential of KICKBACK. Results from using a file with
a diameter too small or a file held too low.
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HU CS
RU RO
BACKWARD SLOPE – Needs too much feed
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HU CS
RU RO
pressure; causes excessive wear to the bar and
chain. Results from using a file with a diameter too
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RU RO
large or file held too high.
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RU RO
MAINTAININg dEPTH gAugE
clEarancE
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See Figure 54 - 56.
Maintain the depth gauge at a clearance of .025 in.
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Use a depth gauge tool for checking the depth gauge
clearances.
Every time the chain is filed, check the depth gauge
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clearance.
Use a flat file and a depth gauge jointer to lower
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all gauges uniformly. Use a .025 in. depth gauge
jointer. After lowering each depth gauge, restore
original shape by rounding the front. Be careful not to
damage adjoining drive links with the edge of the file.
Depth gauges must be adjusted with the flat file in the
■
same direction the adjoining cutter was filed with the
round file. Use care not to contact cutter face with flat
file when adjusting depth gauges.
MAINTAININg THE guIdE BAR
See Figure 57.
WARNINg:
Make sure the chain has stopped before you do
any work on the saw.
42
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