Tryiing to replace motor cannot get diffuser and seal plate free how do they come apart

Take the Diffuser off and run it if the impeller turns then might be tightening the Diffuser too much, it just needs to not move, doesnt really need a super waterproof seal or anything like that. If it still doesnt turn with the Diffuser off it might have locked up when replacing the Impeller, you can try to turn the impeller manually or remove the cover plate on the back of the moter and turn the shaft manually back there. OOoorr you broke it

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.

This is from one of my previous posts, may be some extra steps, but should cover what you need... 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!

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!

Turn off the electric first. Then just remove the 4-6 bolts and separate the back half from the front. The motor with seal plate, impeller, and diffuser can all be pulled back away from the rest of the pump. Now disconnect the electrical from the motor and your can pull the motor with the seal plate, diffuser, and impeller all the way out and work on it. You need to remove the diffuser (plastic housing that goes around the impeller) sometimes this is held by a series of 3 to 6 small screws, other times it just slips over the impeller. 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 one of the components (not sure exact part off top of my head have to look at it) and then turning impeller. If the impeller has a bolt or screw in the middle remove that first. It should 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 (it should be counter clockwise 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 replace the shaft seal, and use a tiny bit of pool lube on the rubber parts when installing, but keep the white and black ceramic surfaces 100% free of any dirt, grease, etc while working with them. The instructions above a based on a very similar model and may vary slightly, let me know if something doesn't look/sound right and I'll clarify. Good Luck

Most likely leaking from either the shaft seal, or the valute seal (big seal plate o-ring). When you replaced the motor you should have also replaced the shaft seal. If not go back and do that whether it's leaking or not. If you get your head down and look at the bottom of the pump while it's running you should be able to see the water coming from the joint between the seal plate, and the seal plate housing, or just behind that from the bottom of the motor probably from the vent holes in the motor housing. If it's coming from the motor then the shaft seal is leaking, and the water is traveling along the shaft and out the bottom of the motor. This will eventually get into the motor and seize up the bearings. If it's coming from the valute seal, then you need to either replace or re-seat the seal. As a general rule you should always replace the shaft seal, and diffuser and seal plate o-rings when you replace the motor or split the seal. I'm not as familiar with the 2 speed hayward super 2, but the standard super 2's have a small ribbon seal, often called a rubber band. They are infamous for going bad especially after pulling the pump apart.

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 and impeller and diffuser can all be pulled back away from the pump. You need to remove the diffuser (plastic housing that goes around the impeller) usually by a series of 3 to 6 small screws. Then disconnect the electrical from the motor and your can pull the motor with the seal plate, and impeller all the way out and work on it. 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 tailpiece 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 one of the components (not sure exact part off top of my head have to look at it) and then turning impeller. If the impeller has a bolt or screw in the middle remove that first. It should 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 (it should be counter clockwise 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 and black ceramic 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. if something doesn't sound right let me know by commenting on this post, or sending email and I'd be glad to clarify. Good Luck!

If it is completely apart, I am guessing you were replacing the motor? Anyway, motor gets mounted to the mounting plate plate by way of four bolts through the mounting plate into the motor. There is an top and bottom to the mounting plate usually indicated on the plate. Next goes the seal plate, there is a top and a bottom as well, usually indicated on the plate, also there is a **** in the seal plate at the bottom, an opening so if the shaft seal leaks, the water has somewhere to go instead of to your motor to rust it out. There are no bolts for the seal plate, it is held in place by the impeller. You need to get a new shaft seal before you do all this (SPX1600Z2), any compitent pool company should have a bunch of them in stock. Shaft seal is two pieces. The white porcelin piece with a rubber gasket around it goes over the shaft and into the seal plate. It fits snug in the seal plate and does not touch the metal shaft of the motor. The other half of the shaft seal goes on the impeller. The side of the piece of the shaft seal that is all black, with no metal, does not bump up to the impeller, it eventually will touch the white porcelin that is now in the seal plate. That black part of the shaft seal that goes on the impeller is made of carbon and can break somewhat easily so don't bang it on anything. You have to wiggle that part of the shaft seal onto the impeller with a little elbow grease. Make sure it is seated all the way on the impeller. Now you can screw the impeller on the the motor shaft. The motor shaft will want to spin on ya so you have to take the back of the motor off and hold the shaft. Should be a 7/16 or 1/2 inch wrench depending on what motor you got. Snug the impeller up while holding your wrench on the shaft. Doesn't need to be a death grip, the motor will actually tighten the shaft seal more due to the direction that it spins. Now the seal plate should be imobile after you tightened the impeller on. You now put the diffuser on to the seal plate. It also has a top and a bottom usually indicated by some writing. The diffuser has little nobs on it (for lack of a better term) that correspond with female groves that accept the nobs located on the seal plate. It just sits there in those groves, no bolts of screws or anything. Lubricate the gasket on the pump housing before you slide everything back into it. And make sure there isn't any debris that's gonna pinch between the seal plate and the gasket. Slide the whole mechanism into the pump and the seal plate should meet flush with the rest of the pump and tighten to it by way of four bolts (9/16"). When sliding that in there you can take off the pump lid, remove the skimmer basket, reach through the whole and guide the diffuser to the hole. Get those four bolts well snug, but if you tighten too much they will start to recess into the housing which aint a huge deal but you don't really want to go too far down that road. I hope thats all understandable, maybe i went into too much detail but I have taken apart and put back together so many hayward pumps that I have learned all the little things that potentially go wrong......good luck!

Make sure breaker/power to pump is off. Remove the six bolts holding the wet end to the seal plate. Remove the diffuser to expose the impeller. Remove the screw in the middle of the impeller by turning clockwise (left hand threads). Remove the dust cap at the rear of the motor and use a wrench to hold the shaft while you remove the impeller by turning counterclockwise. Once the impeller is off, remove the four bolts holding the seal plate to the motor. Press the old seal out of the seal plate and clean it thoroughly. Remove the ceramic part of the seal from the impeller and clean it thoroughly as well. Apply a thin coat of lube to the seal plate and impeller where the new seal will go. Remove the new PS1000 shaft seal from the box (being careful not to touch the ceramic or carbon face with your fingers), press the metal part into the seal plate carefully, try not to bend the metal and make sure its completely seated against the seal plate. You can now install the seal plate back onto the motor and secure with four bolts. Press the ceramic part into the impeller, use cardboard or paper between your fingers and the ceramic face. Once you have seated the seal into the impeller, hold the motor shaft and thread the impeller on until snug, then reinstall the stainless screw, remember it is left hand thread so you'll have to turn it counterclockwise. Reinstall the diffuser over the impeller and then install the wet end onto the seal plate using the six bolts, don't overtighten them.

It is a good idea to replace the tank o-ring when taking to pump apart, but if the o-rings are in good condition, just apply a light coat of lube and reuse them.

This is a general guide for replacing a seal, if you have trouble removing the impeller, you may need an impeller wrench and a tool to hold the motor shaft.

I hope this helps, if you have any specific questions, email me at [email protected]

Lube the seal plate oring and diffuser oring with magic lube.