Ryobi RY10518 Operator's Manual - Page 28
Adjusting The Chain Tension, Warning, Caution
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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 maintenance on the chain. n Stop the engine before setting the chain tension. n Make sure the bar mounting nuts are loosened to finger tight. n 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. n Retension the chain whenever the flats on the drive links hang out of the bar groove. NOTE: During normal saw operation, the temperature 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. CAUTION: A chain tensioned while warm may be too tight upon cooling. Check the "cold tension" before next use. FLATS ON DRIVE LINKS Fig. 41 Fig. 42 Fig. 43 Fig. 44 Page 28 - English