lag
Member
The above quote is correct, you may also have a set screw to loosen on the sheave,after you push the pulley back with the bolts ,you will be able to get to the set screw.The proper way to remove such a pulley is to run the three bolts into the threaded holes on the sheave and force the pulley off of it, then the sheave slides off the shaft. You reassemble the parts loosely, slide the pulley assembly over the new pump shaft and tighten the three bolts. The pulley will shift over a little, so you'll have to compensate when aligning the belts.
If you don't loosen the three sheave bolts, you'll never get the pulley on the new pump without damaging something.