Removing a pulley

I'm scratching my head over how to remove the pulley on my Bristol compressor. After removing the 2 grub screws the pulley turns freely on the shaft, but I've tried (gently) levering it and it shows no sign of moving. The 3 holes in the face are blind and appear to be threaded, maybe to take a puller? The end of the shaft doesn't appear to 'mushroomed'.

Maybe a hub puller will work?

If the 2 grub screws were tightened directly onto the shaft(never a good idea) they may have raised burrs on the shaft making it difficult to remove try a puller gently if it comes off file 2 small flats where the grub screws locate the shaft before you refit then y wont have this problem again and there is also less chance off the pulley slipping on the shaft whilst driving under power.
Regards,
Chiefy.

chiefy wrote:If the 2 grub screws were tightened directly onto the shaft(never a good idea) they may have raised burrs on the shaft making it difficult to remove try a puller gently if it comes off file 2 small flats where the grub screws locate the shaft before you refit then y wont have this problem again and there is also less chance off the pulley slipping on the shaft whilst driving under power.
Regards,
Chiefy.

That makes sense, I am trying to get my head around how the pulley turns easily on the shaft but doesn't pull off. I have not come across a pulley secured by grub screws before. I will try a puller, bearing in mind the pulley appears to be made of 'monkey metal'...

I'd try this style of puller instead of the 2/3 leg type as it will exert the pull closer to the shaft - https://www.machinemart.co.uk/p/cht240-universal-hub-puller/?da=1&TC=GS-040211902&gclid=EAIaIQobChMInriTveqq4wIVrbftCh2JRAZbEAQYBCABEgKROfD_BwE

Or if you have drills & taps etc. knock one up from a piece of decent thickness steel plate.

Having blown up the picture it looks to me as if the shaft has mushroomed, try running a file around the beveled edge of the shaft, if it rotates then any damage caused by the grub screws is very slight, it can oly be the end of the shaft holding it.

Maryalice

maryalice wrote:Having blown up the picture it looks to me as if the shaft has mushroomed, try running a file around the beveled edge of the shaft, if it rotates then any damage caused by the grub screws is very slight, it can oly be the end of the shaft holding it.

Maryalice

I wondered if this is damage to the shaft or the pulley itself?

you might also try opening the crankcase door (if one is fitted) and inserting a piece of wood to stop the crank turning and then attempting to turn the pulley off. No use if the shaft has been mushroomed though.

Robotstar5 wrote:

maryalice wrote:Having blown up the picture it looks to me as if the shaft has mushroomed, try running a file around the beveled edge of the shaft, if it rotates then any damage caused by the grub screws is very slight, it can oly be the end of the shaft holding it.

Maryalice

I wondered if this is damage to the shaft or the pulley itself?

Agreed there is damage to the pulley hole but look at the champher of the shaft its not clean or sharp and there are dings in it as well as the end of the shaft, it only needs a couple of thou to stop the pulley coming off.

Maryalice

Thanks for the replies, the damage highlighted is on the pulley, I will clean up the end of the shaft before I attempt to remove the pulley.

It has moved maybe 5mm, I have worked it back and forth to the point where I can move it by hand but it stops with a 'clunk'...