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MAINTENANCE
WARNING:
To avoid serious personal injury, read and under-
stand all the safety instructions in this section.
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
to the chain to avoid possible serious lacerations.
CAUTION:
Always wear gloves when handling the bar and
chain; these components are sharp and may
contain burrs.
NOTE: When replacing the guide bar and chain, always
use the specified bar and chain listed in the Bar and Chain
Combinations section later in this manual.
Remove the battery pack before you do any work on the
chainsaw.
Remove the bar mounting nut using the combination
wrench provided.
Remove the chain cover.
Remove the bar and chain from the mounting surface.
Remove the old chain from the bar.
Lay out the new saw chain in a loop and straighten any
kinks. The cutters should face in the direction of chain
rotation. If they face backwards, turn the loop over.
Place the chain drive links into the bar groove as shown.
NOTE: Make certain of direction of chain.
Position the chain so there is a loop at the back of the
bar.
Hold the chain in position on the bar and place the loop
around the sprocket.
Fit the bar flush against the mounting surface so that the
bar stud is in the long slot of the bar.
Replace the chain cover ensuring that the adjusting pin
in the chain cover is in the bar chain tensioning pin hole
and that both bar studs are securely in their respective
holes in the chain cover.
NOTE: The adjusting pin may need to be slightly reposi-
tioned with the chain tensioning screw so that it is aligned
with the position of the bar chain tensioning pin hole.
Replace the chain cover and bar mounting nut.
Finger-tighten the bar mounting nut. The bar must be free
to move for tension adjustment.
Remove all slack from the chain by turning the chain
tensioning screw clockwise until the chain seats snugly
against the bar with the drive links in the bar groove.
Lift the tip of the guide bar up to check for sag.
Hold the tip of the guide bar up and tighten the bar mount-
ing nut securely.
The chain is correctly tensioned when there is no sag on the
underside of the guide bar, the chain is snug, but it can be
turned by hand without binding.
NOTE: If chain is too tight, it will not rotate. Loosen the bar
nuts slightly and turn the tension adjuster 1/4 turn counter-
clockwise. Lift the tip of the guide bar up and retighten the
bar nuts securely. Ensure that the chain will rotate without
binding.
ADJUSTING THE CHAIN TENSION
See Figures 33 - 35.
WARNING:
Stop the motor, wait for all moving parts to stop,
and remove the battery pack. Never touch or ad-
just the chain while the motor is running. The saw
chain is very sharp. Always wear protective gloves
when performing maintenance on the chain. Failure
to follow these instructions can result in serious
personal injury.
Proper chain tension is critical to the performance of your
chainsaw. Always check chain tension before using the saw
and periodically until the work is complete.
A cold chain is correctly tensioned when there is no slack on
the underside of the guide bar. The chain should be snug,
but still able to be turned by hand without binding.
A warm chain is correctly tensioned when the flats on the tie
straps hang approximately .050 inches out of the bar groove.
The tip of the combination wrench provided is approximately
this size and can be used to help determine if a warm chain
is correctly tensioned.
If adjustment is needed:
Loosen the bar mounting nut to finger tight.
Raise the tip of the guide bar and continue to hold up
until the end of this procedure.
Turn the chain tensioning screw clockwise until the flats
on the tie straps of the chain contact the bar, making sure
the drive links are seated inside the bar groove.
Retighten the bar mounting nut securely.
Release the tip of the guide bar and verify the chain is
now correctly tensioned using the guidelines above.
17 — English
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