Ryobi RY40007 Manuel D'utilisation page 166

Proper chain tension is critical to the performance
of your chain saw. Always check chain tension
before using the saw and periodically until the
work is complete.
A cold chain is correctly tensioned when there is
no slack on the underside of the guide bar. The
chain should be snug, but still able to be turned
by hand without binding.
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:
 Make sure the bar mounting nuts are loosened
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 nuts 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 chain cover screw slightly,
then turn the chain tensioning screw 1/4 turn
counterclockwise. Lift up the tip of the guide bar,
retighten the chain cover screw securely, then
verify the chain will now rotate without binding.
NOTE: New chains tend to stretch; check the
chain tension frequently and tension as required.
NOTICE:
A chain tensioned while warm may be too tight
upon cooling. Check the "cold tension" before
next use to avoid possible injury.
MAINTENANCE
CHECK FOR WEAR
TOP PLATE
RIVET HOLE
CHAIN MAINTENANCE
See Figures 35 - 37.
Remove the battery pack and make sure the
chain has stopped before you do any work on
the saw to avoid accidental starting and pos-
sible serious personal injury.
27 - English
RAKER CLEARANCE
.025 in.
OR DAMAGE
DRIVE SPROCKET
CUTTING
CORNER
HEEL
GULLET
WARNING:
Fig. 35
Fig. 36
SIDE PLATE
DEPTH GAUGE
TOE
Fig. 37