MAINTENANCE
31
• Stop the motor and disconnect from power supply before setting the chain tension.
• Slightly loosen the chain cover lock knob.
• Turn the chain tensioning knob 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.
• Rotate the chain cover lock knob clockwise to secure. 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 1/16" (1.3 mm) out of the bar
groove. NOTE: New chains tend to stretch. Check the chain tension frequently and tension
as required.
ADJUSTING THE CHAIN TENSION (See Figure 29-30)
WARNING:
Never touch or adjust the chain while the motor is running. The saw chain is very sharp.
Always wear protective gloves when performing maintenance involving the chain.
CAUTION:
A chain tensioned while warm may be too tight upon cooling. Check the “cold tension”
before next use.
Fig. 29
Fig. 30
FLATS ON DRIVE LINKS
≈ 1/16" (1.3 mm)
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