ICS, Blount Inc. • 4909 SE International Way Portland, OR 97222 USA • Tel 800.321.1240 • Fax 503.653.4393
© ICS, Blount Inc. • REV 0810 • f/n 545354
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Quick Start Guide
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680GC
Page 3
(start on page 1)
Page 3
(start on page 1)
WARNING
Never start the saw without the guidebar,
diamond chain and side cover properly installed.
Failure to do so may result in serious injury.
ASSEMBLING THE SAW
(continued)
• All chains have a tendency to stretch when used. Diamond
chains stretch more than wood cutting chains because of the
abrasive materials they are cutting. If the chain is too tight, a
lot of the saw’s power goes into turning the chain rather than
into the cut. In extreme over-tightened cases, the saw may
not be able to turn the chain at all. In addition, damage can
occur to the bar nose and premature stretch may occur.
• If the chain is too loose, it could come off the bar, or it will
allow the drive sprocket to spin without turning the chain,
which can chew up drive links. When a chain stretches to a
point where the drive links are hanging approximately 1/2 in.
(12 mm) to 3/4 in. (18 mm) below the bar, it is time to tension
the chain.
• Before cutting, check for proper tension by pulling the chain
around the bar by hand. If you cannot easily pull by hand, the
chain is too tight and may be loosened slightly.
CAUTION: Be aware that guidebar rails may develop sharp
edges over time so always pull the diamond chain by the
diamond segments.
• Continue to lift up on the nose of the guidebar and rmly
tighten the side cover nuts.
NOTE: To prevent chain tensioner breakage, be sure the side
cover nuts are tightened to approximately 20 ft-lbs (27 Nm).
• Attach to water source with pressure of not less than
20 psi (1.5 bar).
7
8
9
CHAIN TOO LOOSE
CORRECT CHAIN TENSION
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