Ryobi RCS3845 Original Instructions Manual page 29

OPERATION
Chain tensioning
1. Stop the engine. Wear protective gloves.
Disengage the chain brake.
2. Make sure the bar mounting nuts are
loosened to finger-tight.
3. To increase the chain tension, turn the
chain tensioning screw clockwise and
check the chain tension frequently. To
reduce the chain tension, turn the chain
tensioning screw counterclockwise and
check the chain tension frequently.
Tighten the bar mounting nuts by turning
them clockwise to 11 ~ 13 Nm (Turn the
nut 180° or 3 flats past finger tight). Do
not overtighten.
NOTE: The chain tension is correct when
the gap between the cutter in the chain
and the bar is about 3 - 4 mm. Pull the
chain in the middle of the lower side of the
bar downwards (away from the bar) and
measure the distance between the bar and
the chain cutters.
NOTE: The temperature of the chain
increases during normal operation causing
the chain to stretch. Check the chain tension
frequently and adjust as required. A chain
tensioned while warm may be too tight upon
cooling. Make sure that the chain tension
is correctly adjusted as specified in these
instructions.
1
2
3
1
3-4 mm
27