© 2009 ICS, Blount Inc.
F/N 525746 Jan 09
TITLE
680GC OPERATOR’S MANUAL
20
MAINTENANCE
DRIVE SPROCKET
The drive sprocket (rim sprocket) is a wear item and should be
replaced every 2-3 diamond chains.
IMPORTANT
The needle bearing inside the splined adapter should be greased
regularly and should be replaced with each new clutch cup.
IMPORTANT
A rim sprocket system (Figure 2) consists of a clutch cup
w/ splined adapter and a rim sprocket. When the rim sprocket
wears out, it is the only part that needs to be replaced. The clutch
cup with splined adapter is a wear item that needs replacement
after 3 to 5 rim sprockets have been used.
• Inspect the rim sprocket for wear. Replace the rim sprocket if
the drive teeth become pointed.
• Check the drive sprocket bearing by spinning clutch cup.
Replace the bearing if it is worn out.
• The needle bearing on the drive shaft must be greased
regularly, use high quality water-resistant bearing grease.
Figure 2
Clutch
Cup
Splined
Adapter
Rim
Sprocket
CHAIN TENSIONER
The chain tensioner (Figure 1) can become clogged with concrete
slurry during cutting. After each use thoroughly flush the chain
tensioner with water and apply a liberal amount of grease.
IMPORTANT
Most Common Causes of Tensioner Damage:
• Side cover nuts are not tight enough. Side cover nuts
should be torqued to 20 ft-lbs (27Nm).
• Chain tensioning is attempted without loosening
the side cover nuts.
• Concrete debris in tensioner pocket.
Figure 1
Chain
Tensioner
Summary of Contents for 680GC
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