Tools needed:

• 1/2″ wrench

• 9/16″ wrench

• Rubber mallet

• Rubber gloves

• Adjustable channel-lock pliers

• Large flat head screwdriver

• 1″ PVC coupling

Parts needed

• Seal Kit – GO-KIT71

• U.S. Seal Lube

• Silicone sealant
  

Optional parts you may need

• Impeller – P15

• Volute Face Plate -  P5

• Bracket – P10

Remove Face Plate

Use a 1/2″ socket wrench to remove the 6 nuts and bolts that hold the volute face plate to the motor bracket. Remove all the nuts and bolts and simply pull the face plate off.  You will see the impeller once removed.

Remove Impeller

Removing the impeller

First locate the shaft of the motor in the rear. The motor will have a shaft access cover that is either pressed in to the motor or a plastic cap that turns to come off. You will see the shaft once you remove this cover. Use a wrench or a large flat head screw driver to secure the shaft from moving while you unscrew the impeller off the shaft. The impeller is threaded on to the end of the shaft with regular threads. It will unscrew counter clockwise. You may have to use a pair of channel-lock pliers on the front of the impeller. If so, use a rag on the snout of the impeller to protect it while clamping down on it with the pliers.

Remove The Motor Bracket

Remove motor bracket

Use a 9/16″ wrench or socket to remove the four bolts that hold the motor bracket to the motor. Take note that the top two bolts are shorter than the bottom two bolts, which hold the pump stand on. Once all four bolts are removed, you will be able to remove the motor bracket.

Remove The Shaft Seal

Remove the spring seal portion of the shaft seal

The shaft seal is in two parts. The porcelain white part is in the impeller, and the stainless steel part with the spring is pressed in the motor bracket. Remove the porcelain seal part from the impeller with a flat head screwdriver or by hand. Be sure to remove the black rubber grommet that sits around the white porcelain.

Note: This is a good time to inspect the impeller for heat damage. The shaft seal is water cooled. If the pump ran dry for an extended amount of time, you will usually see a plastic melted lip on the raised part of the impeller around the white porcelain area of the seal. Remove the rubber grommet and inspect the volute, motor bracket, and impeller for signs of wear or warping. Replace if necessary.

Next, remove the spring seal portion in the motor bracket. Place the motor bracket on a flat surface facing down. Use a rubber mallet or a hammer to gently tap out the stainless steel cup/spring into the center of the motor bracket. Be careful not to damage the motor bracket. Once the seal is removed, clean the hole in the center of the bracket.

Installing The New Shaft Seal

Be very careful not get any silicone on the face of the seals. Just a slight residue of silicone on the face will cause the seal to fail and leak prematurely. It’s recommended to wear a pair of rubber gloves to prevent getting the seal face dirty.

Install porcelain seal in impeller

Install the porcelain side of the shaft seal in the impeller. The black rubber grommet goes down into the impeller leaving the white face of the porcelain facing up. Some US Seal Lube on the rubber grommet makes setting it into the impeller easier. Use your thumbs or palm to press it into the impeller. Be sure not to touch the face of the white porcelain with your bare fingers, and do not get any silicone residue on the white face of the seal.

Install spring seal in motor bracket

Next, install the spring side of the shaft seal in the bracket. Apply a small bead of silicone sealant (important: use a small bead) to the lip on the back side of the stainless steal cup. Then place the seal into the bracket with the lip facing down. The bead of silicone will make a seal between the stainless steal cup and the plastic motor bracket. Use a 1″ PVC pipe coupling around the lip of the stainless seal cup to tap and press the seal into place. You will want to gently tap it in with a mallet until the shaft seal is firmly pressed in. It is normal for some of the silicon to ooze out between the stainless cup and the plastic bracket. Don’t worry about  wiping it because you run the risk of transferring some silicone residue on to the face of the seal.

Install The Motor Bracket
Before installing the motor bracket back on the motor, change out the shaft o-ring. There is a small groove in the motor shaft. Replace the old o-ring with the new one from the rebuild kit. Add a little lubricant to the o-ring; it will help make it easier to install the motor bracket. Slide the motor bracket on to the shaft and up the the motor. Be sure the tear shaped “V” on the inner part of the motor bracket is located on the top. Install the motor mounting bolts. Notice, the top two bolts are shorter than the bottom two. The longer bolts go through and secure the pump stand.

Install The Impeller
Now that the seal plate is bolted to the motor, thread the impeller back on the motor shaft clockwise. You will need to hold the motor shaft with a flat head screwdriver or an open-ended wrench while tighting down the impeller. The impeller should only be hand tight.

Install The Volute
Apply some silicone sealant or o-ring lube to the seal plate o-ring. Then place it on the lip of the motor bracket. The sealant or lube will help hold it in place while you install the volute face plate. Slide the six bolts back through the volute into the mounting bracket and tighten down the nuts.