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b. Chain tension
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
Stop the motor and remove the battery pack before setting the chain tension.
Make sure the chain cover knob, Fig 16, is loose to finger tight. Use a hex key to turn the
chain tensioning allen screw clockwise to tension the chain, Fig 17.
Do not over-tension the chain as this will lead to excessive wear and will reduce the life of
the bar and bar chain. Overtensionning also reduces the amount of cuts you will get per
battery charge.
NOTE: 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.
The chain must be re-tensioned whenever the flats, Fig 18 (A) on the drive links hang out
of the bar groove as shown in Fig 18.
During normal operation, the temperature of the chain will increase. The drive links of a
correctly tensioned warm chain will hang approximately 0.050 in. out of the bar groove, as
shown in Fig 19.
c. Replacing the bar and chain
Remove the battery pack before replacing the bar, chain to avoid possible serious injury.
Remove the chain cover knob, Fig 16, by turning it in an anticlockwise direction. Place the
chain cover knob to one side and then remove the chain cover from the chainsaw.
The bar contains a slot, Fig 20 (A) that fits over the mounting post, Fig 20 (B). The bar
also contains a chain tensioning pin hole, Fig 20 (C) which fits over the chain tensioning
pin, Fig 20 (D).
Place the bar onto the mounting post so that the chain tensioning pin fits into the chain
tensioning pin hole.
NOTE: if necessary, rotate the chain tensioning Allen screw counter clockwise until the
pin and hole can be aligned, Fig 17
Fit the chain, Fig 20 (E) over the sprocket, Fig 20 (F) and into the bar groove. The cutters
on the top of the bar should face toward the bar tip, in the direction of the chain rotation.
Replace the chain cover and tighten the chain cover knob finger tight only.
Remove all slack from chain by turning the chain tensioning Allen screw clockwise that
the chain seats into the bar groove during tensioning.
Tighten the chain cover knob securely
NOTE: Chain is correctly tensioned when here is no slack on the underside of the bar, the
chain is snug, but it can be turned by hand without binding. If chain is too tight, it will not
rotate. Loosen the chain cover screw slightly and turn chain tensioning screw ¼ turn
clockwise. Retighten chain cover screw securely.
d. Guide bar
Most guide bar problems can be avoided by keeping the product well maintained.
Incorrect filing and non-uniform cutter and depth gauge settings because most guide bar
problems, primarily resulting in uneven bar wear. As the bar wears unevenly, the rails
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