I need to change the seal in the A/C compressor and have removed the shaft nut on the A/C clutch but cannot get it to come off. Is there a trick or special tool required to remove? Thanks in advance for your help.

 

Okay I found out you need a special tool for this but nobody close-by has one. Does anyone know what size bolt and type threads would work for this purpose? It looks like a 15/16 bolt with NC 12 threads but not sure. Thanks.