Barnacle Parp's CHAIN SAW GUIDE

(Page 8 of 8)

November/December 1978
By the Mother Earth News editors 
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READJUSTING THE BAR AND CHAIN

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Examine your chain while it's still hot. A hot chain stretches and there should be a slight sag, so that the side straps in the bottom middle are not quite touching the bar. The drive link tangs should be just visible, and riding well up in the groove of the bar.

The best advice is never to adjust the chain while it's still hot. You should let it completely cool. But we can't always take the time we should to do things right.

To tension a warm chain, turn your saw OFF. Pull the chain around the bar and snap it a few times while pumping the manual oiler. Then lay the palm of your glove flat on top of the chain and give it as fast a spin around the bar as you can. If the sag is very slight, side straps almost touching along the bottom rails of the bar, the tension is satisfactory. If it's too tight or too loose, you must set the tension.

Loosen the nuts on the bar bolts just enough to be able to move the bar. Hold the nose of the bar up while you turn the chain-tensioning screw. When the side straps are almost touching at the bottom middle of the bar, the tension is approximately correct.

And, above all, remember: There is one rule that no experienced chain saw operator ever breaks. NEVER touch the chain or attempt to adjust tension while the engine is running!

Excerpted from BARNACLE PARP's CHAIN SAW GUIDE by Walter Hall, copyright © 1977 by the author. Permission granted by Rodale Press. Available in paperback for $7.95 plus 95¢ shipping and handling from Mother's Bookshelf, P.O. Box 70, Hendersonville, North Carolina 28739

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