Chainsaw User Manual

Page 28 — English
MAINTENANCE
ADJUSTING THE CHAIN TENSION
See Figures 44 - 46.
WARNING:
Never touch or adjust the chain while the engine
is running. The saw chain is very sharp. Always
wear protective gloves when performing main-
tenance on the chain.
Stop the engine before setting the chain ten-
sion.
Slightly loosen the clutch cover lock knob by
pressing in and rotating counterclockwise.
Hold the tip of the guide bar up and turn the
chain tensioning dial 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.
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.
The tip of the supplied combination wrench
(UT10526 only) can be used as a guide to help
determine the correct warm chain tension.
NOTE: New chains tend to stretch; check
the chain tension frequently and tension as
required.
CAUTION:
A chain tensioned while warm may be too tight
upon cooling. Check the “cold tension” before
next use.
Fig. 44
FLATS ON DRIVE LINKS
≈ .050 in.
Fig. 46
Fig. 45
≈ .050 in.
Fig. 43