Pump Rebuilding Guide
Step 1 - Start Here
Inspect The Pump Lid
This is the pump lid. The o-ring and pump lid are a vital to the performance of your pump. A lid inspection is an important part of any pump repair. Look carefully for cracks in the lid or o-ring, replace as needed. Sometimes cracks in the lid are hard to see, but will cause the pump to lose suction when running. If this happens you will see air under the pump lid while running and have a decrease in pump performance.
Step 2 - Open The Pump Housing
You first need to separate the two halves of the pump. In this case we have bolts holding the pump together, other pumps can have steel clamps or screws.
Inspect The Volute O-ring
This is the opened pump showing the o-ring that seals the two halves of the pump. You generally will want to replace the o-ring or gasket when you open the pump.
Step 3 - Inspect the Diffuser O-ring
Remove The Diffuser
We are now removing the diffuser. Not all models of pump have a diffuser.
Step 4 - Inspect The Impeller
Prepare To Remove The Impeller
Go to the rear end of the pump to prepare to remove the impeller. First remove the cover and expose the rear end of the motor shaft. As you can see, there are different styles of end cap, depending on which motor you have.
Step 5 - Remove The Impeller
Unthread The Impeller
Holding the motor shaft stationary, we unthread the impeller counterclockwise. These can be quite stuck. Sometimes you will break the impeller getting it off.
Step 6 - Shaft Seal
Remove The Seal Plate
Now we take the last half of the pump off the motor. These attachment points vary by pump, look carefully and you will find them.
On some pumps the motor is attached by long bolts that run the entire length of the motor; in this case they will be found at the far end of the motor.
On some pumps the seal plate will pull off by hand after the motor is removed and there will be another piece of the pump underneath it that bolts onto the motor.
Step 7 - Motor Replacement
if you need help selecting the correct motor for your application be sure to consult with our staff.
A Note About "Up-Rated" Motors.
An up-rated motor and a full-rated motor are often the same motor with two different labels. This means that an up-rated 1 HP motor as the same as a full-rated 3/4 horsepower motor. You will sometimes see motors or impellers on our site listed at two different horsepowers. This is dependant on how the manufacturer marketed their pump.
Step 8 - Replace The Pump Seal
This is the rear half of the shaft seal. Some of the shaft seals will pull out by hand, some (like this one) are set in metal cups and need to be tapped out from behind. We recommend putting a little silicone sealant on pump seals when you put them back in.