Chainsaw Repair

How To Basics - Carb Fixes + Mods - IPL and Service Manuals => How To Basics and Fixes => Topic started by: Cut4fun on May 17, 2015, 10:08:19 am

Title: Ring pin removal replacement relocating
Post by: Cut4fun on May 17, 2015, 10:08:19 am
Ring pin removal replacement relocating

I think it was Adam  @aclarke   that had told of doing this on Racesaws back in the day.

I am just wondering on how to remove and replace one or relocate if needed.

Thinking it was said using small drill bits for ring pins in pistons.
Title: Re: Ring pin removal replacement relocating
Post by: 660magnum on May 17, 2015, 11:08:44 am
In most model airplane engines the ring pin is vertical down through the piston.
Title: Re: Ring pin removal replacement relocating
Post by: aclarke on May 17, 2015, 12:37:40 pm
You can cut the old pin out easily with the proper diameter carbide end mill or possibly a  drill press if care is taken.  Easier to go through the top of the piston and peen the hole over gently. I've used wire/numbered drill bit shanks as the locator pin. 
The pin placement needs to be done carefully and the ring ends will likely need to be re-profiled with a file of diamond burr as the profile of the locating pin is different now. Make sure the ring will completely collapse in the ring land
Title: Re: Ring pin removal replacement relocating
Post by: Cut4fun . on May 17, 2015, 01:14:49 pm
Thanks for info you two. :)
Title: Re: Ring pin removal replacement relocating
Post by: JohnG28 on May 18, 2015, 11:05:20 pm
You would place the ring pin in a hole drilled vertically down? Then use a small drill bit into the hole as the pin? Just trying to make sure I have what you mean correct. Probably not going to need it anytime soon but I appreciate the info.