Question about Hayward 1.5 Hp Northstar High Performance Pump

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I have a Hayward Northstar 2hp pump that is leaking apparently from the Seal Plate. I replaced the Seal Plate O-Ring, Diffuser O-Ring, Impeller Ring, and Seal Assembly but it continues to leak. I used silcone on all O-Rings as recommended by the parts dealer. Any suggestions?

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Wow, thats odd. If you replaced every seal/o-ring and its still leaking its gotta be 1 of 2 things

You installed the shaft seal wrong- no disrespect, just a possibility

or there is a hairline crack somewhere you are missing...

Posted on Aug 23, 2010

Testimonial: "The shaft seal ould be a possibility but I think I'm OK there. However, I did check the pump again today and there was NO LEAK. Thanks anyway"

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1 Answer

How do I fix the seal?


please follow this steps . God bless you
  1. Turn off the pump motor and close the input and output valves.
  2. Loosen the fasteners that secure the tube connecting the pump and motor.
  3. Move the motor away from the pump housing.
  4. Remove fasteners holding the diffuser to the backplate.
  5. Inspect the diffuser and O-ring for wear, replacing as needed.
  6. As needed, remove fasteners attaching the impeller to the shaft. Alternately, the impeller may be screwed on to the end of the shaft.
  7. Remove the impeller and seal from the shaft.
  8. Inspect and replace the impeller and seal.
  9. Reassemble the pump.
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Nov 23, 2013 | Hayward Sp2607x10 Super 1 Hp Swimming Pool...

1 Answer

How do I take it apart


follow this steps and fix it. God bless you
  1. Turn off the pump motor and close the input and output valves.
  2. Loosen the fasteners that secure the tube connecting the pump and motor.
  3. Move the motor away from the pump housing.
  4. Remove fasteners holding the diffuser to the backplate.
  5. Inspect the diffuser and O-ring for wear, replacing as needed.
  6. As needed, remove fasteners attaching the impeller to the shaft. Alternately, the impeller may be screwed on to the end of the shaft.
  7. Remove the impeller and seal from the shaft.
  8. Inspect and replace the impeller and seal.
  9. Reassemble the pump.
7e13e6cb-4b3a-4633-869c-5fb51a7ab1b0.jpg

Nov 23, 2013 | Hayward Sp2607x10 Super 1 Hp Swimming Pool...

1 Answer

Replace usq1202 pump


It looks like since you have a square flange motor you have either a Tri-Star, a Maxflo II pump or other model by Hayward.. Either way the process is very similar.
Replace the seal, o-rings and gaskets with new ones. Use a teflon based lubricant on all rubber parts, including the seal, but try not to get any on the ceramic (white ring).
  1. Shut power off at the breaker.
  2. Remove the bolts connecting the motor plate to the pump housing.
  3. Back motor assembly out of pump housing making sure that the diffuser and its gasket also come out.
  4. Disconnect the electrical supply.
  5. Remove the diffuser if still covering the impeller, (there may or may not be screws to remove).
  6. Remove impeller ring (if one).
  7. Holding the impeller firmly remove the impeller screw. This is in the center of the impeller and has a REVERSE THREAD, meaning turn screw clockwise to loosen.
  8. Remove the end cap on the opposite end of the motor and use a 9/16" open end wrench to hold the shaft from turning.
  9. Unscrew the impeller CCW.
  10. IMPORTANT -- Note how both parts of the seal are oriented to assure the new one is installed likewise, then pull off the seal and seal plate, and discard old seal parts. Also note which way is UP on the seal plate relative to the motor.
  11. Reassembly to the new motor is basically reversing the steps above.
NOTES:
The impeller ring (if one) is a ring with a lip around one side. This goes over the center of the installed impeller with the lip facing outward, away from the impeller.



Do not over tighten the bolts! You can damage the pump by doing this. Snug plus about a quarter turn is plenty. In the event you have leaking after startup, open the pump back up and check you housing gasket.

Jan 20, 2013 | Smith 2hp Pool Pump Motor A O Electric...

1 Answer

I am rebuilding a Northstar pump. I thought I had an o-ring between the diffuser and the impeller ring when disasembling. I don't see the on the schematic however.


The impeller ring moves freely and does not use an o ring. The front of the diffuser does have one. It sounds like they gave you an extra. BTW I have found that Northstar pumps get about 4 years out of their motors. That is about half the average life. I hope you are getting longer than 4 years. If not, it may be worth changing to a different pump.

Jan 03, 2013 | Hayward Pool & Spa

1 Answer

Get hayward pump apart model sp4010ns


I have had Northstar pumps apart but it has been a while. I found a narrative written by another expert, macdirk, describing how to replace the motor and here it is.

In order to remove the motor, first turn the motor locking ring. This holds the too halves of the pump together. There should be a small tab you have to press in, then grab the round handle, and spin the outer sleeve to unlock. Once you do this the back half of the can be pulled away. This can be very hard sometimes. If the pump and motor still work, you can flip the switch on for a sec or two, and it will pop the back half away from the front half. If the motor is not working then you'll just have to twist, wiggle and pull till you get it apart. After this make sure the power is off, breaker off, etc. and you can remove two screw from the plastic cover on the tail of the motor and disconnect the wires, and remove that half the pump. Next step is to just pull off the diffuser, which may actually have stuck inside the front half the pump. Next remove the impeller, by unscrewing while locking the shaft from the rear with a wrench. if there is a screw in the center of the impeller threaded into motor shaft remove that first. This should be a left handed thread, so unscrew by turning clockwise. The impeller should unscrew counter clockwise like normal. Next remove the seal plate. That should expose 4 bolts holding the motor to the motor mounting plate. Once you remove this you can remove the old seal, clean, and install new seal. you should replace the diffuser and seal plate o-ring as well. Normally I don't recommend a lot of lube on o-rings, but this one can be a ****** to get back together, so use plenty of lube. As I said getting the back half inserted back into the front half is a pain, so you'll just have to work it. Make sure the motor locking ring is forward of the mounting brace that sits on the ground. This can be hard, but if you get it at the right angle it will go raight in place. Make sure the diffeser and/or diffuser o-ring does not slip off into the pump housing when your trying to get it lined up and back into place. There is a notch in the housing and seal plate that have to line up. Sometimes a clamp or ratcheting strap can be used to help pop the two halves back together.
Now all that being said.... it might be worth it to just take the whole pump in to a pump repair shop and let them rebuild it, or put a new motor and seals for ya. At least check the price and consider it. This pump has unions to install it so there is no pipe work required to remove the whole darn thing. Good Luck, and let me know if you have more questions.


I hope this helps.

Aug 27, 2011 | Hayward 1.5 Hp Northstar High Performance...

1 Answer

How do I remove existing motor and replace it with a new one ? Hayward 2.0 hp # SP2615X20 Thank you


Turn off the electric first. Now split the pump in two by removing the large clamp or 4-6 bolts holding the two halves together. (not the 4 bolts holding the motor to seal plate, but the the bolts holding the seal plate to the seal plate housing). Once you remove the clamp or bolts, the motor with seal plate, diffuser, and Impeller can all be pulled back away from the pump. Then disconnect the electrical from the motor and you can pull the motor with the seal plate, and impeller all the way out and work on it. To get to the impeller, you need to remove the diffuser (plastic housing that goes around the impeller) usually by a series of 3 to 6 small screws. To remove the impeller you need to lock the motor and unscrew impeller. Depending on the motor, you remove a cap in the middle of the tail piece and hold with a wrench, or remove a cap that covers the whole end and grab the shaft with a wrench (usually 7/16") by sliding it under the thermal overload switch, or removing the capacitor for even easier access. Once you've locked the shaft, you can just unscrew impeller. If the impeller has a bolt or screw in the middle remove that first. this screw will be reverse thread so make sure you don't turn the wrong way and break or strip. If there is no screw, or after you've removed it, just spin the impeller off (standard thread). If you can't do it by hand and assuming you don't have an impeller wrench, be very careful and use a large pliers, pipe wrench, or strap wrench to loosen it. After that you unbolt the motor from the seal plate, pull the seal plate away from motor (this removes half the seal), and then pop the other half of the seal from the seal plate. Make sure to replace the shaft seal, and use a tiny bit of pool lube on the rubber parts when installing, but keep the white ceramic, and black graphite surfaces 100% free of any dirt, grease, etc while working with them. Installation is pretty much just the reverse. Install half the seal into the seal plate. Install the seal plate onto motor and bolt into place. Install other half of seal onto shaft. Screw impeller onto shaft and install screw (if one was there to start with) in center of impeller (reverse thread). install diffuser over impeller make sure it is centered and doesn't rub the impeller hub. Install new diffuser and valute o-rings. Hookup wiring before re-attaching to rest of pump. Clamp or bolt back together. Pour plenty of water into pot to prime and flip the motor on for a sec or two. Pour some more water. Install pot lid. You should be good to go. Keep in mind there are many different pumps and some variations to the above instructions, but the above should cover most situations. Hope this helps. If you need further assistance post a reply in the comments, and don't hesitate to leave a good thumb rating if you found this helpful. Thanks, and good Luck!

Oct 02, 2010 | Hayward 2HP Pool Pump Motor A O Smith...

1 Answer

I have a Hayward Northstar 2HP pool pump. I need


If the motor still runs at all start the pump with the lock off and it will pop out. If not use some liquid soap and a small straw like a capalery tube on wd. Any thing small enough to fit through the space you can get when you pull the seal plate back, their is an inner plate with an "O" ring and you need to get the soap to that then let it sit for half hour or so and go back to the side to side prying when the soap and the "O" ring come together it will slide right out.

Sep 20, 2009 | Hayward Northstar Dual Speed Max Rate 2 Hp...

1 Answer

Leak between seal plate and pump/strainer housing


The pump seal is leaking and needs replacing and requires removing four 3/8 bolts (9/16) wrench and removing the motor then the diffuser to get to the impeller and seal . A 7/16 wrench holds the rear motor shaft behind the springs and impeller spins off to reveal the seal which has two parts one on the impeller with a spring and one in the seal plate is white ceramic/ porcelan whatever they use. Part number is an SPX1600KA on super pumps and 1500KA wassome above grounds. When replacing do not touch the mating white and black surfaces with your fingers.

May 25, 2009 | Hayward 1HP Super Pump II Inground Pool...

1 Answer

Changing motor hayward 1.5 HP


Super pumps are very easy. If it is a northstar it is more difficult. Super pump. You will need 1 motor, 1 pump seal, 1 diffuser gasket, 1 housing gasket. turn off breaker, disconnect wires -noting whether it is 110 or 220 volts- , unscrew four bolts on back of pump housing (shaft side of motor), pull out motor with rear housing and diffuser (sometimes diffuser sticks inside), on wire side of motor hold shaft with wrench (flathead in some cases, but it is harder), unscrew impeller counter clockwise (like normal screw - you will nee a big pair of channel locks or a strap wrench), there are two pieces of the back housing and once the impailer is off you can remove the half that is closest to the end of the shaft to reveal four more screws, unscrew those four screws. screw back part of rear housing onto new motor. Install new pump seal to front part of rear housing and impeller, slide on front part of rear housing and then screw on impeller while holding shaft on wire side with wrench (only hand tight), replace housing gasket, replace diffuser gasket, slide into front housing and screw in four bolts. If electrical was 110 you will need to move the jumper on the wire end..if it was 220 then just hook kup wires...doesnt matter which is which as long as green or bare goes to the ground screw.

Mar 14, 2009 | Hayward 2HP Pool Pump Motor A O Smith...

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