Ryobi SS -- RY34440 Trimmer User Manual


 
12 — English
MAINTENANCE
ADJUSTING VALVE-TO-ROCKER ARM
CLEARANCE
See Figures 25 - 27.
Inspect the valve-to-rocker arm clearance after every
25 hours of operation. This should be done in a clean, dust-
free environment.
NOTE: This procedure requires partial disassembly of the
engine. If you are unsure if you are qualified to perform this
operation, take the unit to an authorized service center.
Stop the engine and disconnect the spark plug wire. Allow
the engine to cool completely before proceeding.
Remove the screw from the top engine cover. Remove
engine cover and set aside.
Using a Torx screwdriver, remove the screw from the
rocker arm cover. Remove the cover and set aside.
Align rocker arms by pulling the recoil starter grip just until
the deep hole in the belt pulley is located at the bottom
as shown in figure 24.
Place the feeler gauge under each rocker arm and mea-
sure the gap as shown in figure 25. The gap should be
between .0045 in. and .005 in. for both rocker arms.
NOTE: Use a standard automotive .005 in. feeler gauge.
The feeler gauge should slide between the rocker arm
and valve stem with a slight amount of resistance but
without binding.
If the valve clearance is not .005 in., the clearance should
be adjusted as follows:
 While holding a wrench on the flats of the adjusting nut
with one hand, loosen the retaining nut with a second
wrench as shown in figure 26.
 Rotate the adjusting nut until it touches the feeler gauge.
Once the gap setting is correct, hold the wrench on
the flats of the adjusting nut and retighten the retaining
nut securely.
Adjust the second rocker arm, if necessary.
Replace the rocker arm cover and screw; tighten
securely.
Replace the top engine cover and screw; tighten
securely.
WARNING:
Ensure all engine cover and all engine parts are completely
and properly reassembled before starting engine. Failure
to correctly reassemble engine may result in serious injury
or property damage.
STORING THE PRODUCT
Clean all foreign material from the product. Store idle unit
indoors in a dry, well-ventilated area that is inaccessible
to children. Keep away from corrosive agents such as
garden chemicals and de-icing salts.
Abide by all ISO and local regulations for the safe storage
and handling of gasoline.
When storing 1 month or longer:
Drain all fuel from tank into a container approved for
gasoline. Run engine until it stops.