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The last time I detensioned, was after installing a new blade, using it once. Then I forgot to tension it, started the saw and destroyed the blade.:furious:

Now I unplug the machine, then detension.

It is good practice to take the tension off but not crucial. Most times I forget.

Advantages are:

Urethane and rubber looses memory and if the saw is down for a long time the area where the blade runs over the tire gets slightly compressed.

Constant pressure in one spot on the wheel bearings for a long period without movement, will cause a micro spot where the grease is pressed out, a micro anode with a big cathode follows and bearing wear is accelerated.
 
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