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Page 24
MAINTENANCE
Fig. 41
Fig. 42
Fig. 43
Replace the outer guide bar plate ensuring that the bar pin
groove is at the bottom with the upper and lower edges
angled away from the guide bar.
Replace the clutch cover and bar mounting nuts.
Finger-tighten the bar mounting nuts. The bar must be
free to move for tension adjustment.
Remove all slack from the chain by turning the chain
tensioning screw 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 tension-
ing screw 1/2 turn clockwise. Repeat this process until
sag does not exist.
Hold the tip of the guide bar up and tighten the bar mount-
ing nuts securely.
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. Ensure that the chain
brake is not set.
NOTE: If chain is too tight, it will not rotate. Loosen the bar
nuts slightly and turn the tension adjuster 1/4 turn counter-
clockwise. Lift the tip of the guide bar up and retighten the
bar nuts securely. Ensure that the chain will rotate without
binding.
ADJUSTING THE CHAIN TENSION
See Figures 44 - 46.
WARNING:
Never touch or adjust the chain while the motor is run-
ning. The saw chain is very sharp. Always wear protective
gloves when performing maintenance on the chain.
Stop the engine before setting the chain tension.
Make sure the bar mounting nuts are loosened to finger
tight.
Turn the chain tensioning screw clockwise to tension the
chain.
NOTE: A cold chain is correctly tensioned when there is
no slack on the underside of the guide bar, the chain is
snug, and it can be turned by hand without binding.
Fig. 44
FLATS ON DRIVE LINKS