15
■ 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.
■ Chain must be re-tensioned whenever the flats on the
drive links hang out of the bar groove.
■ During normal saw operation, the temperature of
the chain will increase. The drive links of a correctly
tensioned warm chain will hang approximately 1.27 mm
(.050 in.) 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.
MAINTAINING THE GUIDE BAR
See Fig.29-30.
CAUTION
Make sure the chain has stopped and the battery pack
has been removed before you do any work on the saw.
Proper maintenance will maximize the useful life of the
guide bar.
Each day of use:
■ Clean the bar and check for wear and damage.
Feathering or burring of the bar rails is a normal process
of bar wear, but such faults should be smoothed with a
file as soon as they occur.
Each week of use:
■ Lubricate the socket at the end of the guide bar using a
grease syringe in the lubricating hole.
■ Turn the guide bar and check that the lubrication holes
and chain groove are free from impurities.
A bar with any of the following faults should be
replaced immediately:
■ Wear inside the bar rails that permits the chain to lay
over sideways
■ Bent guide bar
■ Cracked or broken rails
■ Spread rails
MAINTENANCE SCHEDULE
Daily check
Bar lubrication Before each use
Chain tension Before each use
and frequently
Chain sharpness Before each use,
visual check
For damaged parts Before each use
For loose fasteners Before each use
INSPECT AND CLEAN:
Bar Before each use
Complete saw After each use
Fig 27
Fig 28
Fig 29
Fig 30
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