I finally got started on disassembly of the B today and am down to the front pulley. I am trying to figure out what thread size the front of the crank has. I have gotten the impression from the archives that this is generally not an easy task. If I need to get it cherry red will it damage the crank hardness? Can I just run the puller against the crank with a washer?
- Thread starter gurneejoe
- Start date
ScottyHOMeY
Well-known Member
It's not threaded on, it's a keyed tension fit. There is a thread visible in the center on the front end, but that won't help you a bit in getting it off.
Of course, I can't find it right off, but somebody will be along shortly with a link to pictures/descriptions of a homebuilt rig to pull it off in the absence of putting it in a big press.
Some heat will help, but don't go crazy with it. Enough, yes, can mess with your crank and that much isn't necessary. Just as important is not to try a two- or three-jaw puller on it -- they'll only chip out the rear of your pulley. It will take something like a bearing splitter in behind to pull it evenly.
Of course, I can't find it right off, but somebody will be along shortly with a link to pictures/descriptions of a homebuilt rig to pull it off in the absence of putting it in a big press.
Some heat will help, but don't go crazy with it. Enough, yes, can mess with your crank and that much isn't necessary. Just as important is not to try a two- or three-jaw puller on it -- they'll only chip out the rear of your pulley. It will take something like a bearing splitter in behind to pull it evenly.
ScottyHOMeY
Well-known Member
Good luck! If you get time, please let us know how you make out with it.
gene bender
Well-known Member
Very few cranks are threaded. You have removed the steering sector correct. Use a bearing seperator behind the pulley and a good three jaw puller and it will cone off. They are a pressed fit. Check to see you dont have a set screw as some did.I made an installer to replace it as driving could break the pulley and heat wont doo the seal any favors.
One question for the reinstall. What is the thread size and pitch for the end of the crank. I threaded in a 1/2" fine thread bolt but it seems a bit sloppy. Is it a 9/16?. The engine is totally stuck. I may have to unbolt the rods and remove the sleeves and pistons together. The intake for 3-4 was filled with ants. As was the Mag and the ammeter box and battery box. I can add exterminater to my list of jobs.
Those are wet sleeves and you can use a piece of of 2 X 2 oak and a hammer and drive out the rod, sleeve & piston. Then use an acetylene torch
to heat the sleeve to free the piston. Be sure to clean that block area where the old sleeve seals are. New sleeve/piston kits are readily available. Hal
to heat the sleeve to free the piston. Be sure to clean that block area where the old sleeve seals are. New sleeve/piston kits are readily available. Hal
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