© 2011 ICS, Blount Inc.
F/N 70944 May 2011
TITLE
633GC / 633F4 OPERATOR’S MANUAL
10
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.
Guide Bar and Diamond Chain Installation
SET-UP
Air Powered Chain Saw
CORRECT CHAIN TENSION
All chains have a tendency to stretch when
used. Diamond chains stretch more than
wood cutting chains because of the abra-
sive materials they are cutting.
If the chain is too tight, much of the saw’s
power goes to turning the chain rather
than into the cut. In extreme over-tight-
ened cases, the saw may not be able to
turn the chain at all. In addition, damage
CHAIN TOO LOOSE
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 damage drive links.
When a chain stretches to a point where
the drive links are hanging approximately
1/2 in (12mm) to 3/4 in (18mm) below
the bar, it is time to replace the chain even
if there seems to be usable segment left.
The chain typically determines life rather
than the segments wear.
STEP 7
Continue to lift up on the nose of the guide
bar and firmly tighten the side cover nut.
NOTE: To prevent chain tensioner
breakage, be sure the side cover nut is
tightened to approximately 20-25 ft-lbs
STEP 8
Attach to water source with pressure not
less than 20 psi.
Never attempt to shorten chain by
removing links. This is not an option for
extending tool life.
7
THE FOLLOWING SYMBOLS AND DEFINITIONS ARE FOUND THROUGHOUT THIS
MANUAL AND ARE DESIGNED TO MAKE YOU AWARE OF POTENTIAL HAZARDS OR
UNSAFE PRACTICES.
A potentially hazardous situation exists which, if not
avoided, could result in death or serious injury.
A potentially hazardous situation exists which, if not
avoided, may result in minor or moderate injury or
property damage.
A potentially hazardous situation exists which, if not
avoided, may result in product or property damage.
THE FOLLOWING SYMBOLS & LABELS MAY BE FOUND IN THIS MANUAL OR ON THE TOOL.
Read the operator’s manual carefully and understand the
contents before you use this equipment.
Always wear a protective helmet
WARNING
CAUTION
IMPORTANT
Always wear protective glasses or full face protection
Always wear hearing protection
Always use ground fault protection
Always wear breathing protection
Symbols & Labels
