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Re: How to replace chainsaw on blade too much slach in...
Are you sure you need to replace the saw chain? There should be a screw adjuster near where the bar attaches to the saw which tightens or loosens the chain on the bar... You will have to undo the nuts holding the bar onto the saw body slightly first so thew bar can move forward and backward when adjusted with the tension screw to apply tension to the chain to reduce the slack.
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I think this is one of those cutter blade type of trimmers , I do know you have to keep blades razor sharp to cut anything with them , as they do tend to go dull easy (by design) , id go with a pole pruner chain saw if your looking to replace it , but beware as pruner chain blades and chain saws are not interchangeable due to fact that pruner's are made to cut on both sides of bar , chainsaws only cut on down stroke hence have a much more aggressive chain rake , don't put a chain for this on a pruner saw you'll be putting your self at risk of injury
Remove the cover. Loosen the two bolts that hold the chainsaw bar. Slide the bar back (it has a long slot for adjustment) until the blade can be lifted out of the track and sprocket. To replace the blade slip it onto the sprocket and the bar. You must hold the bar level while replacing the blade. Be sure the blade fits into the track around the bar. Once in place double check the placement on the sprocket and pull the bar outward until all the slack is removed from the chain blade. Holding firmly, (it would help to have someone assisting) keep the pressure on the blade and bar while replacing the bolt nuts. Then replace the hood cover. Smile.
I have four options when my chain saw blade gets dull. 1) replace it with a new one. 2) take it to a repair shop and pay half the price of a new blade. 3) Use my hand sharpening file kit from Lowe's, or 4) Use my electric chain saw blade sharpener form Harbor Freight. I recently purchased one for about $30 on sale. In one setting I earned the price of the sharpener by sharpening my old blades that were just hanging on a peg waiting to take to the repair shop. Really, the sharpener takes a small amount of skill, but the few minutes it takes to learn can save a lot of time and moo-lah.
You need to tighten the chain. Loosen the nuts that hold the blade on just a little, then look on the inside of the blade. You will see a screw to tighten the blade. The chain should not be tight. There should be a little space between the chain and the bar. You should not be able to see the guide teeth of the chain. Just about 1/32 of an inch. When you tighten the blade back up, if you had it too lose, it will tighten the chain back to, too tight.
Chain replacement is basically the same on all chainsaws. Loosen the side retaining nuts on the cover over the chain. Now loosen the chain tension screw ( usually a flat headed screw) at least 4 full turns. Put the saw on its side with the blade up. Remove those side cover nuts and the side cover - the blade should sag as you remove the nuts. push the blade towards the engine, paying attention to the direction of the teeth on the chain. remove the chain and clean out the junk from behind the chain around the sprocket and from the inside of the side cover. The emergency brake band is located inside the cover - make sure you clean out the debris from around the band, tensioner screw assembly, and cover. Re-install the new chain, orienting the teeth in the correct direction. Re-install the side cover, making sure the tensioner pin goes into the hole in the bar ( blade). Slightly tighten the side nuts, then re-tension the chain until you can just pull the teeth off the bar. tighten the nuts, being sure you don't over tighten them ( a little past snug is good). Run the saw for a few minutes ( doing 1 cut will speed this step along). Loosen the side cover nuts and re-tension the chain, the re-tighten the nuts.
Hope this helps!!
Chain may be locked in the bar. Caused by low oil flow to chain. You will probably have to remove the bar and blade. Then try to rotate the sprocket, if it will not rotate you may have to replace or repair the clutch. with the blade off try starting the saw and see if it is oiling. There is a small hole in housing that oil should be visible coming out at a fairly good rate. If not you will either have to open orifice in the housing or repairing the oil pump.