Adjusting The Chain Tension; Chain Maintenance - Ryobi RY10521B Manual Del Operador

 Release the tip of the guide bar and turn the chain
tensioning screw 1/2 turn clockwise. Repeat this
process until sag does not exist.
 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.
Ensure that the chain brake is not set.
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 44 - 46.
WARNING:
Shut off engine, wait for all moving parts to stop,
and disconnect spark plug wire and move it away
from spark plug. Never touch or adjust the chain
while the engine is running. The saw chain is
very sharp. Always wear protective gloves when
performing maintenance on the chain. Failure
to follow these instructions can result in serious
personal injury.
 Stop the engine before setting the chain tension.
 Make sure the bar mounting nuts are loosened
to finger tight.
 Turn the chain tensioning screw 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 combination wrench 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.
MAINTENANCE
RAKER (DEPTH GAUGE) CLEARANCE
NOTICE:
A chain tensioned while warm may be too tight
upon cooling. Check the "cold tension" before
next use.

CHAIN MAINTENANCE

See Figures 47 - 48.
Check that the switch is in the STOP (
before you work on the saw to avoid accidental
starting and possible serious personal injury.
Use only a low-kickback chain on this saw. This
fast- cutting chain provides kickback reduction when
properly maintained.
Page 27 — English
FLATS ON DRIVE LINKS
≈
.050 in.
≈ .050 in.
CAUTION:
Fig. 44
Fig. 45
Fig. 46
.025 in.
Fig. 47
) position