Ryobi RY39505 - Manual (Page 12)

10 - English
MAINTENANCE
WARNING:
When servicing, use only identical replacement parts.
Use of any other parts could create a hazard or cause
product damage.
WARNING:
Always wear eye protection with side shields marked to
comply with ANSI Z87.1, along with hearing protection.
Failure to do so could result in objects being thrown into
your eyes and other possible serious injuries.
WARNING:
Before inspecting, cleaning, or servicing the machine,
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, lubricant, grease, etc.
WARNING:
Do not at any time let brake fluids, gasoline, petroleum-
based products, penetrating lubricants, etc., come in con-
tact with plastic parts. Chemicals can damage, weaken or
destroy plastic which could result in serious personal
injury.
You can often make adjustments and repairs described here.
For other repairs, have the trimmer serviced by an authorized
service dealer.
WARNING:
Blades are sharp. When handling the blade assembly,
wear non-slip, heavy-duty protective gloves. Do not place
your hand or fingers between blades or in any position
where they could get pinched or cut. NEVER touch blades
or service unit with the spark plug wire connected.
REPLACING BLADES
See Figure 7.
Periodically inspect the blades for damage and wear. Always
use the manufacturer’s specified replacement blades.

Stop the engine and disconnect the spark plug wire.
 Place the hedge trimmer upside down on a workbench
and remove the gear box cover screws.
 Remove the gear box cover and set aside.
 Remove the blade screws.
 Remove the old blade.
 Install the new blade and reinstall blade screws to secure.
Torque to 65-75 in.lbs.
 Install the gear box cover and reinstall gear box cover
screws to secure. Torque to 30-40 in.lbs.
LUBRICATING THE BLADE
See Figure 8.
For easier operation and longer blade life, lubricate the hedge
trimmer blade before and after each use.

Stop the engine and disconnect the spark plug wire.
 Lay the hedge trimmer on a flat surface. Apply light weight
machine lubricant along the edge of the top blade.
If you will be using the hedge trimmer for an extended period,
it is advisable to lubricate the blade during use.
NOTE: Do not lubricate while the hedge trimmer is running.

Stop the engine and disconnect the spark plug wire.
 Lubricate the hedge trimmer as described above.
 Reconnect the spark plug wire and resume use.