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„ A warm chain is correctly tensioned when the flats on the
tie straps hang approximately .050 inches out of the bar
groove. The tip of the combination wrench provided is
approximately this size and can be used to help determine
if a warm chain is correctly tensioned.
If adjustment is needed:
„ Loosen the bar mounting nut to finger tight.
„ Raise the tip of the guide bar and continue to hold up
until the end of this procedure.
„ Turn the chain tensioning screw clockwise until the flats
on the tie straps of the chain contact the bar, making sure
the drive links are seated inside the bar groove.
„ Retighten the bar mounting nut securely.
„ Release the tip of the guide bar and verify the chain is now
correctly tensioned using the guidelines above.
NOTE: If the chain is too tight and will not rotate, loosen
the bar mounting nut slightly, then turn the chain tension-
ing screw 1/4 turn counterclockwise. Lift up the tip of the
guide bar, retighten the bar mounting nuts securely, then
verify the chain will now rotate without binding.
NOTE: New chains tend to stretch; check the chain tension
frequently and adjust as needed.
NOTICE:
A chain tensioned while warm may be too tight upon
cooling. Check the "cold tension" before next use to
avoid possible injury.
CHAIN MAINTENANCE
See Figures 33 - 35.
WARNING:
Remove the battery pack and make sure the chain has
stopped before you do any work on the saw to avoid
accidental starting and possible serious personal injury.
Use only low-kickback chain on this saw. This fast-cutting
chain will provide kickback reduction when properly main-
tained.
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, consider the following:
„ Improper filing angle of the side plate can increase the
risk of a severe kickback.
„ Raker (depth gauge) clearance.
• Too low increases the potential for kickback.
• Not low enough decreases cutting ability.
MAINTENANCE
„ 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 indicated, have the drive sprocket replaced by
a RYOBI Service dealer.
HOW TO SHARPEN THE CUTTERS
See Figures 36 - 37.
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.
WARNING:
The saw chain is very sharp, always wear protective
gloves when performing maintenance to the chain to
prevent serious personal injury.
„ Properly tension the chain prior to sharpening. Refer
to Adjusting the Chain Tension section earlier in this
manual. Do all of your filing at the mid-point 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.
„ 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. Oc-
casionally remove filings from the file with a wire brush.
WARNING:
Improper chain sharpening increases the potential of
kickback, which can result in serious personal injury.
WARNING:
Failure to replace or repair damaged chain can cause
serious injury.
NOTICE:
A dull or improperly sharpened chain can cause excessive
motor speed during cutting which may result in severe
motor damage.
16 - English
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