Hi BB,

Guess it's been asked a hundred times here already, so I might as well ask it 101. Got a D315 pony engine that's been off the machine a few decades and want to tear it down for evaluation. Rust is built up around the end of the crankshaft where the nut is on the flywheel. Don't want to bust something, so any recommendations on removing the nut would be greatly appreciated. Learn something new every day.

Thanks

Tapered shaft on the pony crank,,so it takes a real puller. Should be 2 threaded whole to pull from. Not good to pull from the outside. With a puller putting pressure on you may need to hit the center screw,or even heat the fly wheel.

"Ray54" wrote:

Tapered shaft on the pony crank,,so it takes a real puller. Should be 2 threaded whole to pull from. Not good to pull from the outside. With a puller putting pressure on you may need to hit the center screw,or even heat the fly wheel.

Ok thanks, it's the nut itself is what I have to remove first. The end of the crank is rusted and I was wondering if it's ok to put heat on it, didn't want to temper the crank or something trying to remove it. Is it ok to put heat on it?

Just put a socket on it with a impact gun to remove.(a big socket!). Wire brushing & little heat on the nut is ok.

Moderation in all things. The first time I took the fly wheel off I was so lucky nothing broke.

I used a good puller but did not have the legs to pull on bolts in the wholes.Put good amount of tension on the puller,used mild heat,got a little more on puller. Afraid to tighten more,went and had a cold one sitting in the shade. Over on the tractor there was small noise. It had popped and was loose.

Make sure you leave the nut on while pulling unless you want to wind up wearing that flywheel when it lets go.

"Old wrote:

Make sure you leave the nut on while pulling unless you want to wind up wearing that flywheel when it lets go.

Great suggestion OM. A neighboring trucker I know had a difficult yoke to remove from drive axle once. A heavy duty come a long and a hammer helped him remove the yoke. Unfortunately it hit him in the eye socket and people said he looked like a Koi goldfish for a week. Lucky for him it didn’t kill him instead.
Safety first!!!

"STEPHEN" wrote:

Just put a socket on it with a impact gun to remove.(a big socket!). Wire brushing & little heat on the nut is ok.

You win the cyber cookie! Used an electric 3/4" impact wrench and it came off with no heat. Looked like someone had tried a chisel on it before. Probably would have been more difficult otherwise. Pulled flywheel off with an old crow foot-looking puller., Wasn't too bad after tapping circumference with plastic tip hammer.