Fan stuck on keyway / shaft
 

Inherited a 2 blade alum fan / water pump. The fan won't come off the shaft with a puller, etc. Any safe method to remove the fan so as to not damage the fan ?

Re: Fan stuck on keyway / shaft
 

Penitrating oil and a bigger hammer. support the pully and wack the pump snout. Reverse the nut and use a hardwood block or leather hammer.

Re: Fan stuck on keyway / shaft
 

Depending on how you are supporting the pulley, have something soft under the pump so that it doesn't bounce off the concrete floor.

Re: Fan stuck on keyway / shaft
 

Try some heat from a propane torch.

Re: Fan stuck on keyway / shaft
 

Screw a head nut onto a head stud a turn or so,then weld it there.Then screw that onto the water pump shaft,until it bottoms out.Make sure the nut doesn't bottom out on the fan.If it does put some kind of shim on the end of the pump shaft.Tighten it real tight,then hold the fan with the pump hanging, hit the stud with a hammer.A real hammer,and don't poot around with it.No tap,tap,tap crap,belt it.Watch your toes.I know you haven't put too much pressure on it with a puller,because you haven't broken the pulley.The amount of pressure they can take without breaking is tiny.

Re: Fan stuck on keyway / shaft
 

as keith says!

Re: Fan stuck on keyway / shaft
 

Aluminium expands more than steel as it warms. I have no issue with what Keith True says but I suggest doing what nkaminar also says. IMO, combining the two will help. Heat will loosen the grip between the fan and shaft while the head stud trick will allow you to give it a decent thump to break it free.
Bear in mid what Keith also says about the fan not being able to withstand much pressure if you support it at the back of the pulley. DON'T ask me how I know that but I was able to repair it.

Re: Fan stuck on keyway / shaft
 

Heat and ATF + time and patience. The parts suppliers used to sell a piece that went on in place of the nut, like the rear wheel remover you screwed on and smacked with a hammer.
Don't know if anyone still carries it.

Re: Fan stuck on keyway / shaft
 

https://youtu.be/Wcd-zIA1YrE?si=1j42YFo-z3e21h-1 Like others have said ,