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12 13
MAINTENANCE
FLATS
APPROX .050 IN. (1.25 mm)
Fig. 14
Fig. 13
WARNING:
When servicing, use only identical Ryobi replacement
parts. Use of any other parts may create a hazard or
cause product damage.
WARNING:
Always wear safety goggles or safety glasses with side
shields during power tool operation or when blowing
dust. If operation is dusty, also wear a dust mask.
WARNING:
Before inspecting, cleaning or servicing the unit (except
for carburetor adjustments), shut off engine, wait for all
moving parts to stop, and disconnect spark plug wire
and move it away from spark plug. Failure to follow
these instructions can result in serious personal injury
or property damage.
GENERAL MAINTENANCE
Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types of
commercial solvents and may be damaged by their use. Use
clean cloths to remove dirt, dust, oil, grease, etc.
WARNING:
Do not at any time let brake fluids, gasoline, petroleum-
based products, penetrating oils, etc., come in contact
with plastic parts. Chemicals can damage, weaken, or
destroy plastic, which may result in serious personal injury.
Only the parts shown on the parts list are intended to be
repaired or replaced by the customer. All other parts should
be replaced at a Ryobi Authorized Service Center.
CHAIN TENSION
See Figures 13 - 14.
WARNING:
To avoid possible serious injury, never touch or adjust the
chain while the motor is running. The saw chain is very
sharp; always wear protective gloves when performing
maintenance to the chain.
n Stop the engine before setting the chain tension. Make
sure the guide bar nut is loose to finger tight, turn the
chain tensioning screw clockwise to tension the chain.
Refer to “Replacing the Bar and Chain” for additional
information.
NOTE: A cold chain is 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.
n Chain must be re-tensioned whenever the flats on the
drive links hang out of the bar groove as shown in fig.
20.
n During normal operation, the temperature of the chain will
increase. The drive links of a correctly tensioned warm
chain will hang approximately .050 in. (1.25 mm) out of
the bar groove, as shown in fig. 14.
NOTE: New chain tends to stretch; check chain tension
frequently and tension as required.
CAUTION:
Chain tensioned while warm, may be too tight upon cool-
ing. Check the “cold tension” before next use.