This guide will explain how to replace your inground pool pump motor. We will go step by step through disassembling your pool pump , discarding the old motor, repairing the new motor, its installation, and how to wire it. If you have any questions about finding the correct replacement motor for your in-ground pool pump, read our guide on how to do so: How To Choose The Right Replacement Pool Pump Motor . Note: Please read the complete guide before starting your installation. Click Here to Find Your Replacement Pool Pump Motor
Step 1
Select the Correct Replacement Motor - Find the Model (MOD), Catalog (CAT), or Part (P/N) on your old motor’s information tag and enter it into Inyo’s product search.
If you cannot find the necessary information or want more information on identifying the correct replacement pool pump motor, read our guide: How To Choose The Right Replacement Pool Pump Motor.
Click Here to Find Your Replacement Pool Pump Motor
Step 2
Select Replacement Shaft Seal or GOKIT - When replacing a pool pump motor, always replace the shaft seal; this seal is the last line of defense between the surging water in your pump housing and your brand new motor.
To find the correct replacement shaft seal, you’ll need to identify the make and model of your pump housing. The pump’s model number or model should be listed on one of the pump housing stickers.
GOKITs (Gasket/O-Ring Kits) includes the shaft seal and major gaskets and seals for your specific pump housing. If your pump is older, it may be good to replace all seals while the pump is disassembled to ensure a watertight installation.
If you need help identifying your pump housing: Read our guide: How To Identify Your Pump Manufacturer
Related Articles - How To Replace A Motor Shaft Seal
Click Here to Find Your Pump's GOKIT
Step 3
Shut off Power to the Pump - Shut down the pump’s power source by flipping its breaker.
Step 4
Disconnect Bonding Wire - Unscrew the bonding wire lug to remove it from the motor.
Step 5
Remove Motor From Housing - Use a 9/16” wrench to remove the 6 to 8 (pump model specific) bolts from the pump seal plate, then pull the motor assembly away from the housing.
Step 6
Remove Motor Endcap - Use a screwdriver to loosen the motor endcap’s two screws. Place the endcap to the side after it’s removed.
Step 7
Short the Capacitor - The capacitor may store residual current, making the motor turn while we’re working. To prevent this misfire, using the tip of an insulated-handle screwdriver to both of the capacitor terminals leads to the discharge of the capacitor—also, Plac is a protective material or material between your face to prevent injury from sparks.
Click Here to Find Your Replacement Pool Pump Motor
Step 8
Note Old Motor Wiring and Voltage Setting - Before disconnecting any terminal wires, note or take a picture of the motor’s terminal board. This will help ensure we set the correct voltage and wiring for the new motor installation.
Step 9
Disconnect Terminal Board Wires - Disconnect all hot, neutral, and ground wires from the terminal board.
These will be the wires coming into the motor from the conduit hole.
Step 10
Pull Wires - Pull the disconnected wires out of the motor through the conduit adapter.
Step 11
Remove Conduit Elbow - Unscrew the conduit adapter elbow from the old motor; place the adapter to the side for reuse on the new motor.
Step 12
Remove Diffuser - Remove the diffuser from the end of the motor assembly. Some pump models like the Hayward Super II use fins to stabilize the diffuser in the seal plate; this design allows you to pull the diffuser without tools. Other models like the Jandy Stealth uses screws to secure the diffuser to the seal plate; these will need to be removed first.
Step 13
Remove Impeller Wear Ring - Pull off the impeller’s wear ring.
Note: This step does not apply to all pump designs; not all pumps are designed with a wear ring.
Click Here to Find Your Replacement Pool Pump Parts
Step 14
Stabilize Motor Shaft - Use a 9/16" wrench or a flathead screwdriver to stabilize the shaft.
Step 15
Remove Impeller Screw (If Necessary) - If your impeller uses an impeller screw, use a screwdriver to remove it. Not all impeller designs use an impeller lock screw like the impeller ring. Check your pump model’s parts listing before, or check for a screw during installation.
Note: The impeller lock screw is left-hand threaded (reverse thread). That is why you turn it clockwise to remove it.
Related Articles - Do I Need an Impeller Lock Screw?
Step 16
Unscrew Impeller from the Motor Shaft - While the motor shaft is stabilized, unscrew the impeller counter-clockwise.
Click Here to Find Your Replacement Pool Pump Parts
Step 17
Remove the Seal plate (Motor Mounts to a Separate Mounting Plate) - Depending on the pump design, the seal plate may pull off easily after the impeller is removed because there’s a separate motor mount plate that backs the seal plate.
Step 18
Remove Seal Plate (Motor Mounts Directly to Seal Plate) - For models that use the seal plate as a mounting bracket, you will need to remove the four mounting bolts from the backside of the seal plate.
Step 19
Remove the New Motor’s Endcap - Re-screw the endcap screw on the new motor, and set the endcap screws aside for later re-installation.
Step 20
Install Motor Mounting Bracket or Seal Plate (Depending on Pump Design) - Use the four motor mount screws to reattach the seal plate or motor mount to the face of the motor.
The top of the motor mounting plate for this pump is labeled "TOP"—alternate bolts when tightening (1,3,2,4).
Step 21
Place the Plate Over the Mount Mount (Depending on Pump Design) - If your seal plate is separate from your motor mounting bracket, set it in place now.
Step 22
Remove Old Shaft Seal - Remove the old shaft seal from the old seal plate and impeller steam. Ensure to remove all bits of the old shaft seal, ensuring a snug fit of the new seal.
Note: There are two types of shaft seals used in modern pool pump design; one has the white ceramic side sit in the seal plate, and the spring-loaded side sits on the stem of the impeller. They are shown In Steps 23 & 25. The other standard design is vice versa; the white ceramic sits in an impeller cup around the impeller stem, while the spring-side sits in the seal plate. They are shown In Steps 24 & 26.
Refer to your owner’s manual or the corresponding pars schematic on our Inyo's Pool Pump Parts Finder
Step 23
Install First Half of Shaft Seal - White Ceramic in Seal Plate - Use a clean cloth to press the white ceramic side into the seal plate. First, make sure the Shaft seal is completely seated in the seal plate. Next, use a clean cloth to wipe away any dirt or finger grease that may have marked the smooth ring’s face.
Step 24
Install First Half of Shaft Seal - White Ceramic on impeller Stem - With a clean cloth, press the ceramic shaft seal into the impeller with the white ceramic side facing up.
Step 25
Install Second Half of Shaft Seal - Spring-Side on Impeller - Slide the new shaft seal's spring-loaded side onto the impeller stem.
Click Here to Find Your Replacement Pool Pump Parts
Step 26
Install Second Half of Shaft Seal - Spring-Side Seal Plate - Place a 1" PVC coupler over the seal and lightly hammer the seal into the plate. Check the front and back of the plate to ensure the seal is flush with the plate.
Tip: Apply a small amount of RTV silicone to the metal cup base of the spring-side piece. This will ensure the shaft seal stays secure in the seal plate during installation.
Step 27
Stabilize Motor Shaft - Stabilize the motor shaft with a 9/16” wrench.
Step 28
Install impeller - Hand-tighten impeller onto the end of the motor shaft.
Step 29
Re-Install Impeller Lock Screw (If Necessary) - Screw in the impeller lock screw if your pump requires one.
Step 30
Re-Install Impeller Ring (If Necessary) - Install the old impeller lock screw into the new impeller. Remember, this screw is a reverse thread “Lefty-Tighty.”
Step 31
Re-Install Diffuser - Place the diffuser over the impeller, and align the tabs (or screw holes) of the diffuser into the holes of the seal plate. Install diffuser screws (model dependent.)
Click Here to Find Your Replacement Pool Pump Parts
Step 32
Install Diffuser O-Ring - Apply Teflon lube to the new diffuser o-ring, then slide it into place.
Step 33
Install Housing Gasket - Lube the housing gasket with either Teflon or silicone, then install it into the seal plate’s gasket groove.
Step 34
Mount Motor Assembly to Housing - Slid the motor assembly into the pump housing.
Step 35
Install Pump Housing Bolts - Re-attach the 6 to 8 bolts to secure the motor assembly to the pump housing. The number of bolts varies depending on the model.
Step 36
Attach Conduit Adapter - Screw on the original conduit adapter to the new motor.
Step 37
Connect Wires to Terminal Board - Check your new motor’s wiring diagram to confirm wire orientations.
In this example, we had a single-speed motor running on 230v. We connected the Black hot line to L1, the Red hot line to L2, and the green ground line to the green screw.
Click Here to Find Your Replacement Pool Pump Motor
Step 38
Attach Motor’s Endcap - install the motor’s endcap using two screws.
Step 39
Prime the pump - Use a hose to fill the strainer housing with water, then close the pump lid.
Related Articles - How To Prime a Pool Pump, How To Determine Why a Pool Pump Won't Prime
Step 40
Turn on the Pump - Switch on the pump’s breaker, to restore power.
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