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25
CHAIN TENSION
See Figures 30 and 31.
1. Stop the engine before setting the chain tension.
Make sure the guide bar screw is loosened to finger
tight, turn the chain tensioner clockwise to tension
the chain. Refer to “Assembling the Bar and Chain”
earlier in this manual for additional information.
A cold chain is correctly tensioned when there is no
slack on the underside of the guide bar, the chain is
snug, but it can be turned by hand without binding.
2. Chain must be re-tensioned whenever the flats on
the drive links hang out of the bar groove.
3. During normal saw operation, the temperature of
the chain will increase. The drive links of a correctly
tensioned warm chain will hang approximately
.050 in. (1.25 mm) out of the bar groove.
NOTE: New chain tends to stretch, check chain
tension frequently and tension as required.
CAUTION:
Chain tensioned while warm, may be too tight
upon cooling. Check the “cold tension” before
next use.
APPROX. .050 (1.25 mm)
Fig. 31
Fig. 30
FLATS
MAINTENANCE