Homelite UT74121A - Manual (Page 28)

UK - Page 28
ADJUSTING THE CHAIN TENSION
See Figures 52, 53 and 54.
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 on
the chain.
1. Stop the engine before setting the chain tension.
2. Make sure the guide bar nuts are loosened to finger-tight
and turn the chain tensioner 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.
3. Re-tension 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 1.25 mm
(0.050 in.) out of the bar groove. To help determine the
correct warm chain tension, the tip of the combination
wrench can be used as a guide.
NOTE: New chain tends to stretch. Check the chain
tension frequently and tension as required.
CAUTION:
A chain tensioned while warm may be too tight on
cooling. Check the “cold tension” before next use.
APPROXIMATELY 1.25 mm (0.050 in.)
FLATS ON DRIVE LINKS
APPROXIMATELY 1.25 mm (0.050 in.)
Fig. 54
Fig. 53
Fig. 52
CHAIN MAINTENANCE
CAUTION:
Check that the switch is in the STOP “ ” position before
working on the saw.
Use only a low-kick-back chain on this saw. This fast-cutting
chain provides kick-back reduction when properly maintained.
For smooth and fast cutting, maintain the chain properly.
The chain requires sharpening when the wood chips are
small and powdery, the chain must be forced through the
wood during cutting, or the chain cuts to one side. During
maintenance of the chain, consider the following:
Improper filing angle of the side plate increases the risk
of a severe kick-back.
MAINTENANCE