04-09-2022, 01:26 PM
Willie 20 years ago I bought a used Cuyuna ULII-02 ultralight plane engine, and needed to change the engine's steel cog belt drive pulley. Couldn't get the old one off even with a puller. I left the puller on stressed up as much as I dared. I'd douse it with WD-40, tap around it with a soft hammer every day. Didn't want to heat it.
Eventually I was dousing and banging on it once a week. Then after a time occasionally whenever I remembered. It lived in the basement. Five months later it let go with a loud pop, heard all the way upstairs, the pulley and puller had flown off and landed on the floor.
The reason it was so tough? Loctite in the taper bore, I discovered.
Eventually I was dousing and banging on it once a week. Then after a time occasionally whenever I remembered. It lived in the basement. Five months later it let go with a loud pop, heard all the way upstairs, the pulley and puller had flown off and landed on the floor.
The reason it was so tough? Loctite in the taper bore, I discovered.