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thrown 32" chains

Started by floorboy, December 11, 2006, 06:37:14 PM

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floorboy

December 11, 2006, 06:37:14 PM
I have a husquvarna 2100cd with a 32" oregon bar and woodsman chain. The saw cut well at
first. As I was cutting a log from the bottom up the chain came off. The chain was tight when this happened. This same thing has happened two times since. Any help would be appeciated!  :-[

beenthere

#1
December 11, 2006, 07:51:03 PM
If the chain was for a fact tight, then I'd look for something out of alignment, or bent. 
Maybe a new chain on a worn sprocket.
Having the chain pop off isn't fun, as I remember. Usually was when I was cutting brush however. Never when cutting with the log above the bar.
south central Wisconsin
It may be that my sole purpose in life is simply to serve as a warning to others

Kevin

#2
December 11, 2006, 08:10:23 PM
Does the chain pitch match the drive sprocket and bar nose sprocket?

floorboy

#3
December 11, 2006, 10:25:13 PM
The pitch does match the sprocket. I did not install a new sprocket with the new bar and chain. Could this really be the problem.

sawguy21

#4
December 11, 2006, 10:47:07 PM
Check for damage to the bar rail just behind the nose sprocket. It is probably grooved which will result in repeated failures. Did you attempt to file the burred chain drivers?
old age and treachery will always overcome youth and enthusiasm

floorboy

#5
December 13, 2006, 10:17:54 PM
yes I did file the damaged drivers. Is this a bad idea?

sawguy21

#6
December 13, 2006, 11:02:21 PM
If any more than light filing is required I would deep six the chain. The drivers need to be in good shape to maintain proper contact with the sprocket and bar.
old age and treachery will always overcome youth and enthusiasm

floorboy

#7
December 24, 2006, 10:29:44 PM
I finally had time to mess with the saw. I installed a new oregon 72lg full comp chain. The saw cut all day with no problems. could the skip tooth chain have been causing the thrown chains?
I have notice that the full comp sure vibrates less than the skip.

Allison

#8
December 25, 2006, 06:30:04 AM
Sounds like you had a problem with the way that chain was setup. With a sharp chain and the keeping the revs up when you cut you shouldn't notice too much difference in vibration between skip and full comp. I run both regularly and don't notice much difference. If skip chain was more lkely to get thrown you wouldn't see so many pros using it as a first choice.
I'll let the wiser ( I bet I can't say older) ones here sort out the details of what you had happening.

Have a good holiday, it's finished here already :( :(

Be Safe, Allison :)
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