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MAINTENANCE AND CLEANING
OREGON® CHAIN SAW
MODEL CS1500-091
F/N 570773 - AC 0614
REPLACING THE DRIVE SPROCKET
Replace the drive sprocket after every
two saw chain replacements or when the
sprocket is damaged.
Wear gloves.
• Unplug the chain saw.
• Loosen the side cover release knob
slightly, but do not remove the side cover.
• Loosen the chain tensioning ring (turn it
counterclockwise) as far as it will go.
• Loosen the side cover release knob and
remove the side cover.
• Remove the bar and chain.
• Use a small flat screwdriver to pry open
and remove the e-clip, then remove the
drive sprocket and spring (Fig. ).
• Insert the new spring and drive sprocket,
and install the new e-clip (Fig. ).
• Replace the bar and chain as described
in “Replacing a Worn Saw Chain and
Sharpening Stone”.
• Tension the chain as described in
“Tensioning the Saw Chain” in the
“Preparing for Use” section of the manual.
TENSIONING THE SAW CHAIN
IMPORTANT: ONLY TENSION THE SAW
CHAIN WHEN THE CHAIN IS COOL. A HOT
CHAIN MAY CONTRACT AND DAMAGE
THE GUIDE BAR OR CHAIN AS IT COOLS.
If the chain does not touch the underside of
the bar when the chain saw is off and cool,
it should be tensioned.
Tension the chain as described in
“Tensioning the Saw Chain” in the
“Preparing for Use” section of the manual.
ADDITIONAL MAINTENANCE
INFORMATION
For further information on maintaining the
saw chain, guide bar and drive sprocket,
consult the OREGON® Maintenance and
Safety Manual at http://oregonproducts.com/
maintenance/manual.htm.
FIG. 37
FIG. 38