© 2017 ICS®, Blount International Inc. REV072517 P/N 566594
890F4 OPERATOR MANUAL
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Maintenance
DRIVE SPROCKET
•
The drive sprocket is a wear item and
should be replaced every two to three
chains, or when the teeth become pointed
or if a groove cuts through top of tooth.
•
Inspect the sprocket for wear.
•
Inspect drive shaft for wear.
DRIVE SPROCKET ASSEMBLY
REMOVAL/INSTALLATION
•
Disconnect power cutter from the
power source
•
Remove the side cover, bar retainer plate,
guidebar and diamond chain
•
Remove snap ring from shaft
•
Slide drive sprocket off shaft
•
Slide new sprocket onto shaft
•
Replace snap ring onto shaft and assure complete engagement
in shaft groove
•
Installation of new drive sprocket is complete.
•
Reinstall guidebar, diamond chain, bar retainer plate and side cover.
•
Assure diamond chain and guidebar are in good, useable condition. Worn
or damaged guidebar and chain can damage the new drive sprocket.
Drive teeth
Snap Ring
Drive Sprocket
Snap Ring
Drive Shaft
Drive Sprocket
