Base Leg Aviation crankshaft oil seal replacement
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- Опубліковано 26 жов 2022
- Vic from Base Leg Aviation walks you through a Lycoming crankshaft oil seal replacement.
Tools Used:
Propeller shaft oil sealer installer
Parts used:
Dow Corning 737 Neutral cure sealant
Lycoming crankshaft seal
@baselegaviation1614
www.baselegaviation.com
Great video! Helped me a lot to replace one of a Cessna 414A. Thank you!
Had to do my o360 in my rv6 25 hours after major overhaul. Annoying, but easy work
The first time I did this I put it on backwards 😂, had to stretch it back off , flip it, and reinstall
did mine about 3 years ago, we used Pilobond instead of Dow Corning 737, no idea which one is better. I remember spending quite a bit of time cleaning the mating surface in the crankcase with solvent, IIRC it was Toluene, putting the Pilobon on the crank case surface before installing the new seal. I don't remember if we warmed the seal up or not but we then put grease on the crank flange and stretched it over like you did. Once it was in place, we cleaned up the grease leaving a thin coating on the crankshaft where it met the new seal so it didn't start dry, made sure the mating surface on the seal was clean and try and then applied Pliobond to it before putting the new seal in. Several years later and I can confirm there are no oil leaks from that seal or the seal area.
I've always used the 737. Great success with no leaks.
Cool video, Vic! A couple of things I've read about replacing this seal is to put it in boiling water. Also, I've read that it's a good idea to use some fine emery cloth to put some "grooves" on the crank in a particular direction that encourages the seal to move towards the engine. My words are failing me at this moment so I'm probably not describing this very well.
What was that plate you used to when installing the seal? Is that a Lycoming part, or a Base Leg Aviation part? And it seems that the installer tool is very expensive, but something similar can be made with PVC pipe. I've never installed one of these seals, so all this information is just what I've read, and my be totally wrong. Thanks for the video!
I don’t know the emery cloth on the crank, but putting the seal in hot water does make the seal more pliable for installation. I’ve seen the PVC tool plan on the internet but have never seen it in action. I work at a large flight school so all I’ve ever see or used is the specialty tool.
Continental calls for sanding the grooves on the crankshaft
I’ve boiled them before but have had just as much luck installing them with some lubrication.
I am surprised sliding that seal over the crankshaft flange does not damage the sealing lip.