Chainsaw Repair

How To Basics - Carb Fixes + Mods - IPL and Service Manuals => How To Basics and Fixes => Topic started by: Cut4fun . on March 18, 2012, 06:04:08 pm

Title: Old rings New Rings
Post by: Cut4fun . on March 18, 2012, 06:04:08 pm

Just to show the newer guys the difference. You can see the wear and feel the psi difference pulling over.

372 50mm rings pulled from a running saw just getting low on compression 120psi, still ran and started good. Checked cold

Then new Caber 50mm rings with about 30 seconds of run in , idling and blips. Checked warm 140psi

Title: Re: Old rings New Rings
Post by: rms61moparman on March 18, 2012, 08:03:50 pm

Amazing that something so small and so simple can have so much effect on the way one runs.
Did you measure the width and see what the difference was?
I'll bet it would be really hard to tell without measuring ring end gap.


Mike

Title: Re: Old rings New Rings
Post by: ms460woodchuck on March 18, 2012, 08:31:19 pm

 Rings just might be the most important pcs of metal in a saw that people over look just because there is no scoring hiding behind the muffler.
 
 Nice picture cut4fun!

Title: Re: Old rings New Rings
Post by: Al Smith on March 19, 2012, 05:10:40 am

If you get a jewels loupe and look at the rings you'll see the old rings have the edges worn round .

Title: Re: Old rings New Rings
Post by: rms61moparman on March 20, 2012, 08:53:02 pm

Well nevermind what I said about being hard to tell!!!LOL

I enlarged the photo a bit and Ray Charles could tell the difference in those!!!

Man, I've never seen rings that worn before!


Mike

Title: Re: Old rings New Rings
Post by: Cut4fun . on March 20, 2012, 09:04:51 pm

Quote from: rms61moparman on March 20, 2012, 08:53:02 pm

Well nevermind what I said about being hard to tell!!!LOL

I enlarged the photo a bit and Ray Charles could tell the difference in those!!!

Man, I've never seen rings that worn before!


Mike

Yeah I was wondering when you ask if I checked end gaps.  When half the ring was missing.  :P

Title: Re: Old rings New Rings
Post by: Cut4fun . on October 20, 2021, 07:00:19 am

Havent done this in a while. Husqvarna 394 rings old and new.

Title: Re: Old rings New Rings
Post by: 3000 FPS on October 20, 2021, 01:25:56 pm

You sure can see the wear on the old rings and how much thinner they start to become.   You can see why they would start to loose some tension when in the cylinder.