How can i undo fan?

[Phil 70]

I would be really grateful,if anyone can help me. I need to change a fan,but its the wrong type. I have got the old one stripped down and i have a motor and bracket that fit on the old fan base. I need to get the back fitting undone,its holding the wheel in place and is connected to the rod,but i cant get it off,ive tried turning it and pulling it,but there is marks/grooves on it as if it needs a certain spanner. Any ideas please

 

[ChrisR]

Any ideas please

Yeah

DON'T.

The fan is a safety-critical part of the boiler and you can't just bung in anything which loooks similar.
a) it's illegal
b) it's stupid
c) it could kill someone

 

[scatmanjohn]

I would be really grateful,if anyone can help me. I need to change a fan,but its the wrong type. I have got the old one stripped down and i have a motor and bracket that fit on the old fan base. I need to get the back fitting undone,its holding the wheel in place and is connected to the rod,but i cant get it off,ive tried turning it and pulling it,but there is marks/grooves on it as if it needs a certain spanner. Any ideas please

If you have got the wrong fan...then you need to get the correct one.

There is no way around it.