Ryobi RY3818 Operation Manual - Page 27

Adjusting The Chain Tension, Warning - chain size

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MAINTENANCE n Lift the tip of the guide bar up to check for sag. n 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. n 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 41 - 43. Fig. 38 Fig. 39 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. Proper chain tension is critical to the performance of your chain saw. Always check chain tension before using the saw and periodically until the work is complete. A cold chain is correctly tensioned when there is no slack on the underside of the guide bar. The chain should be snug, but still able to be turned by hand without binding. A warm chain is correctly tensioned when the flats on the tie straps hang approximately .050 inches out of the bar groove. The tip of the combination wrench provided is approximately this size and can be used to help determine if a warm chain is correctly tensioned. If adjustment is needed: n Stop the engine and make sure the chain brake is not set by pulling the chain brake lever/hand FLATS ON TIE STRAPS Fig. 40 Fig. 41 ≈ .050 IN. (1.25 MM) Fig. 42 ≈ .050 (1.25 MM) Fig. 43 Page 27 - English

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Page 27 — English
Fig. 38
Fig. 39
Fig. 40
Lift the tip of the guide bar up to check for sag.
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 41 - 43.
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.
Proper chain tension is critical to the performance
of your chain saw. Always check chain tension
before using the saw and periodically until the
work is complete.
A cold chain is correctly tensioned when there is
no slack on the underside of the guide bar. The
chain should be snug, but still able to be turned
by hand without binding.
A warm chain is correctly tensioned when the flats
on the tie straps hang approximately .050 inches
out of the bar groove. The tip of the combination
wrench provided is approximately this size and
can be used to help determine if a warm chain is
correctly tensioned.
If adjustment is needed:
Stop the engine and make sure the chain brake
is not set by pulling the chain brake lever/hand
FLATS ON TIE STRAPS
Fig. 41
MAINTENANCE
≈
.
050 IN. (1.25 MM)
≈
.050 (1.25 MM)
Fig. 43
Fig. 42