Ryobi RY40502 Operator's Manual page 25

CHAIN DRIVE
LINKS
BAR
GROOVE
BAR STUDS
CHAIN
TENSION PIN
HOLE
 Make sure the bar mounting nuts are loosened
to finger tight.
 Turn the chain tensioning screw clockwise to
increase 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.
 Retension the chain whenever the flats on the
drive links hang out of the bar groove.
NOTE: During normal saw operation, the tem-
perature of the chain increases. The drive links
of a correctly tensioned warm chain will hang
approximately 0.050 in. out of the bar groove.
The tip of the supplied combination wrench can
be used as a guide to help determine the correct
warm chain tension.
MAINTENANCE
Fig. 27
CHAIN
COVER
BAR
MOUNTING
NUTS
ADJUSTING
PIN
Fig. 28
25 - English
LIFT THE TIP OF THE GUIDE BAR UP TO CHECK
FOR SAG
CHAIN
TENSIONING
SCREW
APPROX. .050 in.
FLATS
≈ 0.050 in.
Fig. 29
BAR MOUNTING
NUTS
Fig. 30
Fig. 31
Fig. 32