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633GC OPERATOR’S MANUAL
10
© 2007 ICS, Blount Inc. P/N 70944 Jan 07
SET-UP
GUIDE BAR AND DIAMOND CHAIN INSTALLATION
STEP 7
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. When
a chain stretches to a point where the drive
links are hanging approximately 1/2”
(12 mm) to 3/4” (18 mm)** below the bar,
it’s time to tension the chain. See Note 2.
STEP 6
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 the chain drive links. 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.
See Note 1.
STEP 8
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 needs to be loosened a little.
See Note 3.
** As measured without pulling
downward (eg. hanging by gravity)
3/4" (18 mm)**
STEP 5
Make sure all the drive links are inside
the guide bar groove then lift the bar nose
and tension the chain by turning the screw
clockwise.