a pulley is a wheel with a groove along with a rope or chain.
The three parts of a pulley are the wheel, the axle, and the rope or cable that runs over the wheel. The wheel is the round disc that rotates on the axle, the axle is the central rod that the wheel spins on, and the rope or cable is what is pulled to move objects.
It takes a special tool to remove the pulley and install the pulley. The tool can be rented from your local auto parts store.
To remove that pulley with out damaging the pump or the pulley you need a power steering pulley puller. This tool will also install the pulley. Your local auto parts store can rent or sell you that puller.
An ac bypass pulley for a 1989 Chevrolet can be purchased at any auto parts store. The cost for the pulley starts at $26.04.
The pulley needs to be removed before you can extract the pump, you can get the pulley removal tool at a car parts store.
In most cases you can purchase the bearing and pulley as an assembly from your local auto parts store.
It requires a power steering pulley PULLER. You can rent them at some parts stores.
A wheel, a groove and a rope/chain.
There is a power steering pulley puller that only uses the hub portion to remove it from the pump shaft. An auto parts store should have such a tool for rent or purchase.
Easy, remove tensioner pulley (13mm left handed thread). Replace pulley Remove 2nd pulley (13mm I think, normal thread) Remove 3rd pulley (13mm I think, normal thread, found below 2nd pulley) Look up VY pulley on google to get a diagram and parts numbers. its simply a matter of unscrewing the bolt and sliding a new pulley in. might as well do drive belt while your there. Costs around $100 all up and takes under an hour :D
There is a specific tool for this operation. It is a power steering pump pulley puller. This grabs the groove in the end of the pulley and pushes the punp shaft away from the pulley. Available at your parts store.
The bicycle is not a simple machine, there are too many interacting moving parts.