Echo HC-331ES Manual De Instrucciones página 23

Care for cutting blades
Wear gloves to protect hands from sharp blades.
If you experience any problems with sharpening the blade, we recommend that you take it to your ECHO DEALER.
Failure to observe these precautions could lead to injury.
1. Bolt slots
1. Bolt
2. Locknut
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CAUTION
3. Loosen 1/2 turn
21
Maintenance and care
Lubricating blades (Every 4 hours of operation)
Apply a few drops of oil the each bolt slots at the bottom of
blades.
Cleaning blades (After each use)
Remove gummy residue from blades with a 50 : 50 mixture of
kerosene (paraffin) and machine oil.
Sharpening blades (As needed)
NOTE
Use a disk grinder, endless abrasive belt, or smooth flat file.
1. Remove all nuts and bolts securing cutters to frame bar.
2. Remove cutters.
3. Hold a cutter in a vice.
4. File and reshape the cutter edges as shown.
5. If frame bar is deformed or damaged, replace with new one.
(A):6 mm radius
(B):100° (Approx.)
(C):45°
Adjusting gap between blades (As needed)
Loosen the locknuts.
Tighten the blade bolts until snug with 10 mm open end wrench.
Loosen the bolts 1/2 turn.
Hold the bolts from turning and tighten the locknuts with T-
wrench.