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613GC OPERATOR’S MANUAL
19
MAINTENANCE
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. Then apply a liberal amount of grease.
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.
DRIVE SPROCKET
The drive sprocket (rim sprocket) is a wear item and should be
replaced every 2-3 diamond chains.
The needle bearing inside the splined adapter should be greased
regularly and should be replaced with each new clutch cup.
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 w/ splined adapter is a wear item that needs
replacement after 3 to 5 rim sprockets have been used.
• Inspect the rim 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.
IMPORTANT
IMPORTANT
IMPORTANT
Figure 2
Splined
Adapter
Clutch
Cu
p
Rim
Sprocket
Chain
Tensioner
Figure 1