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CHAIN TENSION
Stop the engine before setting the chain tension. Make sure the guide
bar screw is loosened to finger tight, turn the tensioning wheel up or
down to tension the chain. A cold chain will be correctly tensioned
when there is no slack on the underside of the guide bar, the chain is
snug, but it can be turned by hand without binding.
Chain must be re-tensioned whenever the flats on the drive links hang
out of the bar groove.
During normal saw operation, the
temperature of the chain will
increase. The drive links of a
correctly tensioned warm chain will
hang approximately .050 in.
(1.25mm) out of the bar groove. Be
aware that chain tensioned while
warm, may be too tight upon
cooling. Check the "cold tension"
before next use.
NOTE: A new chain tends to stretch, check chain tension frequently
and tension as required.
CHAIN MAINTENANCE
CAUTION: Disconnect from the power supply and make sure the
chain has stopped before you do any work on the saw.
For smooth and fast cutting, chain needs to be maintained 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 cuts to one side. During maintenance of your chain
remember:
- 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 cutter teeth have hit hard objects such as nails and stones, or
have been abraded by mud or sand on the wood, have service dealer
sharpen 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 indicat-
ed, have the drive sprocket replaced by a qualified individual. Call our
customer service help line at 1-800-618-7474 for assistance.
HOW TO SHARPEN THE CUTTERS
Be careful to file all cutters to the
specified angles and to the same
length, as fast cutting can be
obtained only when all cutters are
uniform.
Wear gloves for protection.
Properly tension the chain prior to
sharpening. Refer to "Chain
Tension Section" earlier in this manual. Do all of your filing at the
midpoint of the bar.
Use a 5/32 in. diameter round file and holder.
Keep the file level with the top
plate of the tooth. Do not let the
file dip or rock. Using light but
firm pressure, stroke towards
the front corner of the tooth.
CHAIN TENSION AND MAINTENANCE
Approx. .050 (1.25mm)
Model CS34016S
Lift file away from the steel on each return stroke.
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. Occasionally
remove filing from the file
with a wire brush.
WARNING: Improper chain sharpening increases the potential of kick-
back.
WARNING: Failure to replace or repair damaged chain can cause seri-
ous injury.
WARNING: The saw chain is very sharp, always wear protective gloves
when performing maintenance to the chain.
TOP PLATE FILING ANGLE
Correct 30 degrees – File holders
are marked with guide marks to
align file properly to produce top
plate angle.
Less than 30 degrees – for cross
cutting.
More than 30 degrees – feathered edge dulls quickly.
SIDE PLATE ANGLE
Correct – 80 degrees produced
automatically if correct diameter
file is used in file holder.
Hook – "Grabs" and dulls quickly. Increases potential of kickback.
Results from using a file with a diameter too small, or file held too low.
Backward Slope – Needs too much feed pressure, causes excessive
wear to bar and chain. Results from using a file with a diameter too
large, or file held too high.
DEPTH GAUGE CLEARANCE
The depth gauge should be main-
tained at a clearance of .025 in. (0.6
mm). Use a depth gauge tool for
checking the depth gauge clearances.
Every time the chain is filed, check the
depth gauge clearance
Use a flat file and a depth gauge
jointer to lower all gauges uniformly.
Depth gauge jointers are available
in .020 in. to .035 in. (0.5 mm to 0.9
mm). Use a .025 in. (0.6 mm) 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.
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