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Page 24 — English
MAINTENANCE
NOTE: When replacing the guide bar and chain,
always use the specified bar and chain listed in
the Bar and Chain Combinations section later
in this manual.
Disconnect chain saw from power supply.
Rotate the chain cover lock knob counterclock-
wise and remove knob.
Remove the chain cover.
Remove the bar and chain from the mounting
surface.
Remove the old chain from the bar.
Lay out the new saw chain in a loop and
straighten any kinks. The cutters should face
in the direction of chain rotation. If they face
backwards, turn the loop over.
Place the chain drive links into the bar groove as
shown.
NOTE: Make certain of direction of chain.
Position the chain so there is a loop at the back
of the bar.
Hold the chain in position on the bar and place
the loop around the sprocket.
Fit the bar flush against the mounting surface so
that the bar studs are in the long slot of the bar.
WARNING:
When placing the bar on the bar studs, ensure
that the chain tensioning pin is in the chain ten-
sion pin hole. Failure to properly place the chain
tensioning pin in the chain tensioning pin hole
could cause the chain to come loose, resulting
in serious personal injury.
Replace the chain cover.
Replace the chain cover lock knob; rotate knob
clockwise to tighten. The bar should still be free
to move for tension adjustment.
Remove all slack from the chain by turning the
chain tensioning knob clockwise until the chain
seats snugly against the bar with the drive links
in the bar groove.
Lift the tip of the guide bar up to check for sag.
Release the tip of the guide bar and turn the
chain tensioning knob 1/2 turn clockwise.
Repeat this process until sag does not exist.
Fig. 32
Fig. 33
Fig. 34
FLATS ON DRIVE LINKS
Fig. 35
≈ .050 in.
Hold the tip of the guide bar up and tighten the
chain cover lock knob.
The chain is correctly tensioned when there is no
sag on the underside of the guide bar, the chain
is snug, but it can be turned by hand without
binding.
NOTE: If chain is too tight, it will not rotate. Loosen
the chain cover lock knob slightly and turn the
chain tensioning knob 1/4 turn counterclockwise.
Lift the tip of the guide bar up and retighten the
chain cover lock knob. Ensure that the chain will
rotate without binding.