Basically like said above, but in more detail:
Install the two halves and sleeve on the pulley (if the kit is like mine).
Take the long bolt, with the nut threaded all the way on and screw it into the pump.
While holding the bolt head with one wrench, turn the nut in (off the bolt) to drive the pully on.
The pain is the first try or two the bolt will want to unthread out of the pump, reset and start over until some pressure begins.
Stan