I took a Shindaiwa 680 chainsaw on trade. It wouldn't start and seemed to be a little low on compression.
Upon teardown, I discovered stuck piston rings with slight gauling.
Everything cleaned up really nice and I wanted to replace piston rings.
After exhausting all my parts resources, I decided to modify a new set of rings.
Rings were the right diameter with the correct thickness for piston grooves, but they were too wide (piston grooves weren't deep enough.
I am fortunate enough to have a lathe and decided to grind the inside surface of rings. Could have just ground by hand but decided to do it right.![[Hearth.com] Sometimes its necessary to modify a part.](https://www.hearth.com/talk/data/attachments/220/220625-795288f9a64a6c814cb5cbcd15c2760c.jpg?hash=5WZg6meZAL "[Hearth.com] Sometimes its necessary to modify a part.")
![[Hearth.com] Sometimes its necessary to modify a part.](https://www.hearth.com/talk/data/attachments/220/220626-fda09bc576997ca4fe7f6563c3284e31.jpg?hash=MjzXdrc3b5 "[Hearth.com] Sometimes its necessary to modify a part.")
![[Hearth.com] Sometimes its necessary to modify a part.](https://www.hearth.com/talk/data/attachments/220/220627-36ca1134df68d8aece8f66501a73c45c.jpg?hash=mrBRlQ2Fj9 "[Hearth.com] Sometimes its necessary to modify a part.")
Upon teardown, I discovered stuck piston rings with slight gauling.
Everything cleaned up really nice and I wanted to replace piston rings.
After exhausting all my parts resources, I decided to modify a new set of rings.
Rings were the right diameter with the correct thickness for piston grooves, but they were too wide (piston grooves weren't deep enough.
I am fortunate enough to have a lathe and decided to grind the inside surface of rings. Could have just ground by hand but decided to do it right.
