Fri Aug 05, 2016 2:03 am
That pulley is more commonly called a sheave. Unless you want the exact one made by the same manufacture there is nothing special about them. I don't know what your budget is, but you can find them all day long on eBay relatively inexpensively. You do need to know the diameter. Any size change will change the rotating speed of the blower. As far as what sheave you have, usually there is a number cast or stamped in it. This will give you all the information you need as far as belt quantity and type, diameter and sheave/QD split tapered bushing type. You have to match the correct sheave to the correct bushing.
Sheaves are held on to the shaft by means of a QD split tapered bushing. The center of the sheave is tapered as well as the outside of the bushing. Two or three bolts on one side of the bushing pull the sheave onto the bushing mating the two tapered surfaces together. As you tighten the bolts the tapered surface of the sheave squeezes against the tapered surface of the bushing. This in turn squeezes the bushing tighter and tighter to the shaft.
For removal of the sheave the bushing should have four or six holes on one side. One set should have bolts in it holding the sheave tight to the bushing. The other two should be open and threaded. Remove the two or three bolts holding the sheave to the bushing. Then insert the bolts into the open threaded holes. Evenly thread the bolts in slowly alternating between each one. This will evenly press the sheave free from the bushing. The sheave will eventually freely fall away. Once the sheave is free from the bushing the bushing should be able to be removed from the shaft and then remove the sheave.
Owner of a Federal Electric Model 2, Federal Sign and Signal SD-10, Federal Sign and Signal 1000(T) and a H.O.R. Si-Rex 7:10 Omnidirectional