© 2012 ICS, Blount International Inc. Specications are subject to change without notice. REV020212 F/N 545353
TITLE680GC OPERATOR’S MANUAL
21
MAINTENANCE
DRIVE SPROCKET INSTALLATION
• Slide the rim sprocket onto the splined adapter, either side out.
• Apply a liberal amount of grease to the needle bearing.
• Place the thin metal washer onto drive shaft. Slide the needle
bearing and clutch cup w/rim sprocket onto shaft.
• Install the clutch by turning it counter clockwise on the drive
shaft and firmly tighten. Replace the clutch slurry shield.
Installation of drive sprocket assembly is now complete.
DRIVE SPROCKET REMOVAL
• Remove the side cover, guidebar, diamond chain, and clutch
slurry shield.
• Remove the spark plug and insert the piston stop (supplied
with each saw) into the spark plug hole. Pull the starter cord
slowly until the piston stops. Use a 19 mm wrench to turn the
clutch clockwise and remove.
• Slide the clutch cup/drive sprocket assembly off the shaft.
Remove the needle bearing and inspect for heavy wear or
damage.
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