Ryobi RY40502 - Manual (Page 24)

24 - English
 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.
 Replace the chain cover ensuring that the
adjusting pin in the chain cover is in the bar
chain tensioning pin hole and that both bar
studs are securely in their respective holes in
the chain cover.
NOTE: The adjusting pin may need to be slightly
repositioned with the chain tensioning screw
so that it is aligned with the position of the bar
chain tensioning pin hole.
 Replace the chain 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.
 Hold the tip of the guide bar up and tighten
the bar mounting 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.
NOTE: If chain is too tight, it will not rotate. Loosen
the bar nuts slightly and turn the tension adjuster
1/4 turn counterclockwise. 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 30 - 32.
WARNING:
Never touch or adjust the chain while the
motor is running. The saw chain is very sharp.
Always wear protective gloves when performing
maintenance on the chain.
 Remove the battery pack before you do any
work on the chain saw.
MAINTENANCE
Fig. 24
Fig. 25
Fig. 26
CHAIN
TENSIONING
SCREW
BAR MOUNTING
NUTS
BAR
BAR MOUNTING
NUTS
CHAIN
COVER
MOUNTING
SURFACE
CHAIN
CHAIN DRIVE LINKS
CUTTERS
CHAIN ROTATION