Ryobi RY5020 Manuel D'utilisation page 36

replace every 125 hours or more frequently, if
necessary.
NOTICE:
Allow engine to cool before removing spark
plug. Removing spark plug from a hot engine
can cause serious damage to the chain saw.
 Loosen the spark plug by turning it counter-
clockwise with the combination wrench pro-
vided or other appropriate socket wrench.
 Remove the spark plug.
 Hand thread the new spark plug, turning it
clockwise. Tighten securely with wrench.
NOTE: Be careful not to cross-thread the spark
plug. Cross-threading will seriously damage the
cylinder.
CLEANING THE EXHAUST PORT,
MUFFLER, AND SPARK ARRESTOR
NOTICE:
This product is equipped with a spark arrestor
that has been evaluated by the USDA Forest
Service; however, product users must comply
with Federal, State, and local fire prevention
regulations. Check with appropriate authori-
ties. Contact customer service or a qualified
service center to purchase a replacement spark
arrestor.
NOTE: Depending on the type of fuel used, the
type and amount of lubricant used, and/or your
operating conditions, the exhaust port, muffler, and/
or spark arrestor screen may become blocked with
carbon deposits. If you notice a power loss with
your gas powered tool, you may need to remove
these deposits to restore performance. We highly
recommend that only qualified service technicians
perform this service.
The spark arrestor must be cleaned or replaced
every 50 hours or yearly to ensure proper per-
formance of your product. Spark arrestors may
be in different locations depending on the model
purchased. Please contact your nearest service
dealer for the location of the spark arrestor for
your model.
MAINTENANCE
CHAIN CATCHER
CLEAN THE CHAIN BRAKE
Never run the chain saw without a muffler
equipped with a spark arrestor in place. Failure
to do so could result in a fire that could cause
serious personal injury.
INSPECTING AND CLEANING CHAIN
BRAKE
See Figures 69 - 70.
 Remove the clutch cover and clean the chain
brake components. Check wear on the brake
band and replace if worn or deformed. The band
thickness should not be less than 0.024 in., or
worn halfway through.
 Always keep the chain brake mechanism clean
and lightly brush the linkage.
Page 36 — English
BRAKE BAND
CLUTCH
COVER
WARNING:
Fig. 69
LUBRICATE THE CHAIN
BRAKE LINKAGE
Fig. 70