29
•
If cutter teeth have hit hard objects, such as nails and stones, or have been abraded by mud
or sand on the wood, have the chain sharpened by a qualified service technician.
NOTICE: Inspect the drive sprocket for wear or damage when replacing the chain. If signs
of wear or damage are present in the areas indicated, have the drive sprocket replaced by
qualified service technician.
How to Sharpen the Cutters
Be careful to file all cutters (Fig. 30) to the
specified angles and to the same length, as
fast cutting can be obtained only when all
cutters are uniform.
1. Remove the battery pack. Wear gloves for
protection.
2. Properly tension the chain prior to
sharpening. Refer to the section:
“Adjusting the Chain Tension” earlier in
this manual.
3. Use a 5/32” (4.0 mm) diameter round file
and holder (available separately). Do all
of your filing at the middle position of the
guide bar.
4. Keep the file level with the top plate of the
tooth. Do not let the file dip or rock.
5. Keep a correct sharpening angle of 30° between the file and the saw chain; see
Fig. 31 & 32. Always use a file holder (available separately) when sharpening saw chains
by hand. File holders have markings for the sharpening angle.
Fig. 31
5/32" (4.0 mm)
Round File
Filing Direction
Cutter tooth
Sharpening
Angle: 30°
Fig. 32
6. Using light but firm pressure, stroke towards the front corner of the tooth. Lift the file away
from the steel on each return stroke.
Fig. 30
Top Plate
Side Plate
Depth
Gauge
