Ryobi RY52002 - Manual (Page 19)

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CAUTION:
Dull or improperly sharpened chain can cause excessive
engine speed during cutting which may result in severe
engine damage.
WARNING:
Improper chain sharpening increases the potential of
kickback. Failure to replace or repair damaged chain
can cause serious injury.
SPOOL REPLACEMENT
NEW PREWOUND SPOOL
See Figures 32 - 33.
If replacing string only, refer to “String Replacement” later
in this manual.
Use only
monofilament string. Use original manufacturer’s
replacement string for best performance.
n
Stop the engine and disconnect the spark plug wire. Hold
the string head and unscrew the spool retainer.
To remove the spool retainer:
n
Turn the spool retainer counterclockwise.
n Remove the empty spool from the string head. Keep the
spring attached to the spool.
n To install the new spool, make sure the two strings are
captured in the slots opposite each other on the new
spool. Make sure the ends of each string are extended
approximately 6 in. beyond each slot.
n Thread the strings into the eyelets in the string head.
Carefully push the spool into the string head (gently pull
the strings to the outside if necessary). When the spool
is positioned in the string head, grasp the strings and pull
sharply to release them from the slots in the spool.
n Push down and turn the spool counterclockwise until it no
longer turns. Hold the spool down and rotate clockwise
a small amount. Release the spool. The spool should be
locked down in the string head. If not, hold down and
rotate until locked.
n Make sure the string head and the spool retainer are
installed on the drive shaft.
MAINTENANCE
Fig. 32
SPOOL
RETAINER
Fig. 33
SPRING
SLOTS
STRING HEAD
EYELETS
SHAFT
To install the spool retainer:
n
Turn the spool retainer clockwise.
n Pull the strings again to rotate the spool into cutting
position. Push the spool retainer down while pulling on
string(s) to manually advance the string and to check for
proper assembly of the string head.