Maintenance – Ryobi RY40502 User Manual
Page 25
25 - English
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
CHAIN
TENSIONING
SCREW
BAR MOUNTING
NUTS
BAR
GROOVE
CHAIN DRIVE
LINKS
CHAIN
TENSION PIN
HOLE
Fig. 27
LIFT THE TIP OF THE GUIDE BAR UP TO CHECK
FOR SAG
APPROX. .050 in.
Fig. 30
FLATS
Fig. 29
ADJUSTING
PIN
Fig. 28
BAR STUDS
Fig. 31
BAR
MOUNTING
NUTS
CHAIN
COVER
Fig. 32
≈ 0.050 in.