Makita UC3020A Instruction Manual page 17

30
2
1. Oil guide groove
2. Oil feed hole
File and file guiding
- Use a special round file (optional accessory) for saw chains, with a
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diameter of 4.5 mm, to sharpen the chain. Normal round files are not
suitable.
- The file should only engage the material on the forward stroke. Lift the
file off the material on the return stroke.
- Sharpen the shortest cutter first. The length of this cutter is then the
gauge dimension for all other cutters on the saw chain.
- Guide the file as shown in the figure.
- The file can be guided more easily if a file holder (optional accessory) is
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employed. The file holder has markings for the correct sharpening angle
of 30 ° (align the markings parallel to the saw chain) and limits the depth
of penetration (to 4/5 of the file diameter).
- After sharpening the chain, check the height of the depth gauge using
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the chain gauge tool (optional accessory).
- Remove any projecting material, however small, with a special flat file
(optional accessory).
- Round off the front of the depth gauge again.
Cleaning the guide bar and lubricating the return sprocket
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CAUTION:
• Always wear safety gloves for this task. Burrs present a risk of injury.
Check the running surfaces of the bar regularly for damage. Clean using a
suitable tool, and remove burrs if necessary.
If the chain saw receives frequent use, lubricate the return sprocket bearing at
least once a week. Before adding new fresh grease, carefully clean the 2 mm
hole on the tip of the guide bar, then force a small quantity of multi-purpose
grease (optional accessory) into the hole.
Cleaning the oil guide
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- Clean the oil guide groove and the oil feed hole in the bar at regular
intervals.
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