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- Feb 26, 2017
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- Belleville, Ontario, Canada

So I have been in a long process of restoring a Husqvarna 444SG and today I have begun re-assembling. As part of the restoration I had planned to check the ring end gap and if worn I would replace the rings. This saw has 2 thin .62mm steel rings. Since I have never checked the ring end gap on these style rings, you can imagine my surprise when the gap near the top of the cylinder was approximately 2.5mm (.098"). I was further surprised when I installed a new ring and discovered it was not much better. After some head scratching I decided I had better find out the wear spec according to the service manual. Turns out, 3mm ring end gap is the spec for ring replacement.
Has anybody else ever ran into this? I imagine compression readings when the saw is cold are artificially low and go up a lot when the saw is at operating temps and the rings have expanded.
Has anybody else ever ran into this? I imagine compression readings when the saw is cold are artificially low and go up a lot when the saw is at operating temps and the rings have expanded.