DescriptionThis video provides step-by-step repair instructions for replacing the tension gear on an Echo chainsaw. The most common reasons for replacing the tension gear is when the chainsaw bar won’t adjust when the tension screw is turned.
All of the information for this tension gear replacement video is applicable to the following brands:
Echo, Shindaiwa
Step-By-Step Instructions1
Before you replace the tension gear on your chainsaw first make sure the chainsaw’s engine has cooled.
2
Next, release the top cover clips and lift the cover off.
3
Remove the wire and boot from the spark plug to prevent the chainsaw from starting accidentally.
4
Now, remove the nuts securing the clutch cover.
5
Pull the cover off and set it on a sturdy surface.
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Now remove the tension bracket screw and carefully lift the adjuster assembly out.
7
Remove the bracket and pull off the old tension gear.
8
Install the new tension gear by sliding it onto the square end of the adjustment bolt.
9
Realign the bracket and position the assembly in the cover.
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Secure it with the screw.
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To replace the cover, the chain tensioner will need to be inserted into the hole in the chain bar.
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You will probably need to rotate the tension adjustment screw counter-clockwise to properly align the tensioner.
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With the cover in place, hand-tighten the nuts.
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Now lift the bar and rotate the adjustment screw clockwise until there is no slack in the chain.
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Now fully tighten the nuts and confirm that the chain is taut.
16
Attach the wire and boot to the spark plug.
17
Realign the top cover and secure it with the clips.