If you currently have a single speed (SS) pump and you would like to reduce your pool operating costs by as much as 80%, you should consider upgrading your pump with a Century Variable Speed (VS) V-Green 165 Pool Motor. To get these savings, it is only necessary to replace the motor. In all but a few cases, you would keep the housing end of the pump and just replace the motor. In this guide, we are replacing the SS motor of a Hayward Super 2 pump with a Century Variable Speed (VS) V-Green 165 Pool Motor. The VS motor adapts easily to the existing pump housing. Depending on your pump model, you would select either the VS motor with a square flange or one with a round flange. Although this guide features a Hayward Super II pump and a Century Variable Speed (VS) V-Green 165 Pool Motor, most of these steps are adaptable to most pumps.
COLLECT TOOLS - Here's a list of common tools you will need to replace your motor: screwdrivers (Phillip head and flat), 9/16" socket wrench, 7/16" open end wrench, channel wrench or strap wrench, silicon gasket lubrication (do not use petroleum jelly), clean soft cloth, "GO KIT" - pool pump seal replacements
DISCHARGE CAPACITOR - Capacitors store power even when the pump has been turned off. To avoid a possible shock, you want to short out the capacitor by laying an insulated screwdriver across its leads. On rare occasion, these capacitors have been known to explode so it's a good practice to wear eye protection and to cover the capacitor with a cloth before shorting the leads.
REMOVE IMPELLER - At the impeller end, twist off the impeller in a counter-clockwise. You may have to use a strap wrench to free up the impeller. It applies even pressure and is less likely to damage the impeller then something like channel lock pliers. This picture shows the two parts of the motor shaft seal after the impeller is off. We will replace these two parts of the shaft seal later in the guide.
REMOVE SHAFT SEAL FROM IMPELLER - Grab the seal on the pool pump impeller and twist it off. Make a note of how the seal is positioned on the impeller so you know how to place the new seal. It is possible to place this seal upside down. Note: You may have to also have to remove the metal collar if the new shaft seal also has one. Several people have written in saying that the new seal won't fit because they were trying to place the new collar on top of the old one.
PUT NEW HALF OF SHAFT SEAL ON IMPELLER - Push the other half of the new seal onto the pool pump impeller. Place the new seal with the black SHINY side facing out. Again, DO NOT touch the shiny surface of the seal that will make contact with the white surface of the seal in the seal plate. Fingerprints will cause the surfaces to burn.
STABILIZE MOTOR SHAFT - At this point, we will want to put the impeller onto the new motor shaft which requires us to stablize the motor shaft. This motor has a little different setup than the single speed motor. To stabilize this motor shaft, you need to place a 5/16" Allen wrench into the hole in the back of the motor. Spin the shaft a little until the end of the shaft engages with the Allen wrench.
REMOVE OLD DIFFUSER GASKET - The GOKIT contains all the gaskets required to replace a motor including the diffuser gasket. Remove the old diffuser gasket from the diffuser.
VIEW ELECTRICAL PORTS - On the back of the motor, you will see two electrical ports. The right one is for the high voltage supply wires and the left one is for display and control low power voltage. Since we are not going to use the low voltage port at this time, make sure it is tightly closed.