16 X7503196706
© 09/2013 ECHO Inc.
DESCRIPTION CS-450
Adjusting Chain Tension
Always loosen sprocket guard nuts before turning the chain tension
adjuster, otherwise the sprocket guard and tensioner will be
damaged.
1. Loosen air cleaner cover knob and remove air cleaner cover.
2. Disconnect spark plug lead.
3. Loosen sprocket guard nuts.
4. Hold the bar nose up, and turn the adjuster screw (A) clockwise
until chain contacts underside of the bar.
5. Tighten nuts with the bar nose held up.
6. Pull the chain around the bar by hand. Loosen the adjustment if
you feel tight spots.
Tighten guide bar nuts to 20 to 23 N•m (175 to 200 in•lbf). DO
NOT over-tighten nuts. Damage to saw may result.
7. Assemble components in reverse order.
8. Keep chain properly tensioned at all times.
Note: All chains require frequent adjustments.
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