Echo QV-680 Instruction Manual - Maintenance
17
QV-680
MAINTENANCE
Sharpen chain
(As Needed)
1. Follow instructions included with sharpening kit.
2. Refer to page 25 for ECHO part number.
Adjust chain tension
(After Each Use)
1. Loosen nuts just enough to allow guide bar to
slide when adjusting screw is turned.
2. Turn adjusting screw clockwise to take up chain
slack.
3. Hold the nose of the bar up with your gloved
hand.
4. Gradually turn adjusting screw clockwise until
the drive links are drawn up into the bar.
5. Pull chain along bar with your gloved hand to
check for binding.
6. Back off tension screw if necessary.
7. Tighten nuts while holding bar in position.
NOTE
Do not sharpen carbide chain with standard file.
IMPORTANT
Always loosen sprocket guard nuts before
turning the chain tension adjuster, otherwise the
sprocket guard and tensioner will be damaged.
Nuts
Proper tension
Improper tension
Adjusting screw
Direction to
tension the chain
Nuts