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.
nDisconnect chain saw from power supply.
nRotate the chain cover lock knob counterclock- wise and remove knob.
nRemove the chain cover.
nRemove the bar and chain from the mounting surface.
nRemove the old chain from the bar.
nLay 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.
nPlace the chain drive links into the bar groove as shown.
NOTE: Make certain of direction of chain.
nPosition the chain so there is a loop at the back of the bar.
nHold the chain in position on the bar and place the loop around the sprocket.
nFit the bar flush against the mounting surface so that the bar studs are in the long slot of the bar.
Fig. 32
Fig. 33
FLATS ON DRIVE LINKS
Fig. 34
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.
nReplace the chain cover.
nReplace the chain cover lock knob; rotate knob clockwise to tighten. The bar should still be free to move for tension adjustment.
nRemove 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.
nLift the tip of the guide bar up to check for sag.
nRelease the tip of the guide bar and turn the chain tensioning knob 1/2 turn clockwise. Repeat this process until sag does not exist.
≈ .050 in. | Fig. 35 |
|
nHold 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.
Page 24 — English