Maintenance – Ryobi RY40500 User Manual
Page 27
27 - English
CHAIN
TENSIONING
KNOB
CHAIN COVER
LOCK KNOB
LIFT THE TIP OF
THE GUIDE BAR
UP TO CHECK FOR
SAG
APPROX. .050 in.
Fig. 31
FLATS
Fig. 30
Fig. 32
ADJUSTING THE CHAIN TENSION
See Figures 31 - 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 main-
tenance on the chain.
Remove the battery pack before you do any
work on the chain saw.
Slightly loosen the chain cover lock knob.
Turn the chain tensioning knob 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.
Rotate the chain cover lock knob clockwise to
secure.
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 .050 in. out of the bar groove.
NOTE: New chains tend to stretch; check the
chain tension frequently and tension as required.
NOTICE:
A chain tensioned while warm may be too tight
upon cooling. Check the “cold tension” before
next use.
MAINTENANCE