How To: Replace a pool pump motor shaft seal

-Hello pool pals. It’s your friends Matt and Rob and today
we’re going to show you how to replace a shaft seal
on an in ground pool pump. Now Rob, why would we need to do that?
-Well, there’s a couple of reasons. The most common would be when you replace
the motor you always want to make sure you replace that shaft seal. Otherwise, you’re going to pay an old shaft seal,
the water is going to run down the shaft and you ruin the new one.
-Exactly. -Another reason is if your motor
is leaking between the plate and the motor back here the shaft seal’s gone bad
and you need to replace it. -Also the in vent holes, a lot of times
you’ll see water coming out of the vent holes. That’s because the seal here is allowing
water down through the shaft of the motor. Now, what tools are we’re going
to be using to do this? -The tools that we’ll be using are just
a simple wrench, a socket wrench. You’ll need a new shaft seal. Other items you might need are a strap
wrench to remove the impeller and then a rubber mallet maybe
to knock the seal plate of. -All right, as a disclaimer before
we get too far ahead of ourselves, obviously it’s not new,
but it’s mildly used so things aren’t going to stick like your pump
that’s been outside in the dirt and grime for about five years. We’ll show you some tips
and tricks on how to get things off. But obviously, we’re not going to come across
some of the hangups you might. Also, this is a workbench, you’re going
to be probably in 90 degree heat and hot and very tight area. This is the best kind of a best case scenario. We understand that might not follow
your particular application. Well just try to follow these steps
as closely as possible and you should do fine. -Yes, and obviously we’re on a workbench here
so we don’t have the electrical hooked up. If you do have the electrical hooked up,
you will have to work a little bit in the back of the motor so it’s a good idea
to short out the capacitor ahead of time. What you have to do is just there’s
two screws you loosen back here. All right so you’ve loosened up the two screws
here so we just slide the end cap off and see that’s the capacitor
and sometimes they can hold a charge so it could give you a little zap. That’s no good. What you do you just get a little flat head
screwdriver and hold the metal across the two terminals to discharge it.
It should be like this. That way you don’t [laughs] zap yourself. -All right. So what do we do next? -From there that’s discharged, so we’re going
to go ahead and separate the motor from the pump body. This particular pump is a pure line prime
but it’s the same on most pumps like a sewer pump. You have either four bolts, six bolts. You might have a metal clamp that holds
the two sides together or a magnum, you have a ring that you loosen. But every pump will separate at this point. I’m just going to get a socket wrench
and remove these bolts. -All right we got the four bolts
that connect the seal plate into the main housing removed. Next is to remove the motor. Go ahead, Rob. All right, now, obviously you can’t do this
in real life but we’re just going to move this bad boy to the side. Run us through what we’re looking at here, Rob. -All right, well this is basically the diffuser,
it’s going to cover up the impeller so we’re good. We’re going to go ahead and remove
this diffuser. Some diffusers will have some screws
that hold it in. This one doesn’t. So it’ll just pop off. -We’re at a point where you can see
in the middle of the impeller. This one looks like it has one of those crazy
[crosstalk] colored screws but it actually doesn’t. Yours may. That’s actually a reversed screw
so you’re going to go righty loosey instead of lefty loosey to get these things on. But, how do we get this impeller off
if it’s just one of those regular threaded on? -Well, you have to stabilize the shaft
from the back of the motor. All right, this is the shaft that we have
to stabilize in order to get the impeller off and usually the access points are going
to be at the top where you can slide a wrench in there. This particular one is a half inch wrench
but sometimes you’ll use a 7 16s. You just slide it in here
and just stabilize it. -All right. Then we’ll spin this around. -Okay, so we’ve got the shaft stabilized
from the back and then we’re going to spin the impeller
off counterclockwise. This one obviously isn’t going to be that hard
because it’s a slightly used pump. If you can’t get it off by hand you can use
a strap wrench like this and then you just wrap the rubber around
there and then you’re able to turn it, get more tension on it. This one shouldn’t be too hard. All right we’ve got the impeller off,
now what we need to do is remove the seal plate and this one will just pop right off. Sometimes it gets stuck, you can pry it off
with a flat head screwdriver or you might have to bang it out
with a rubber mallet. This one we didn’t have to so that’s good. -Lucky day. -All right, you can see the two parts
of the shaft seal here. The ceramic part is pressed into the seal
plate and the spring portion is slipped onto the shaft of the impeller. This is what prevents the water
from running down the shaft. -The shaft that we’re showing here is a common
one found in the Hayward Super Pump and the Hayward Super too. Another common one we have is the one
that goes into the Pentair Whisper Flow or the Pentair Super Flow or Intel Flow. You see this little copper cup,
this will go on the seal plate. This would go on the impeller side. Just make sure when you’re taking apart
your pump that you are keeping note of which side goes where. What are we going to do next Rob? -Next we’re just going to pop the old shaft
seal out of the seal plate and impeller. The spring portion should pull right off. Sometimes it’s really common on
the sewer pump impellers when you pull the spring portion off,
the center part of this shaft seal will stay on the shaft of the impeller. So you want to make sure you get
that metal piece off. -Yes, it’s just going to look like a little
sheath and it’ll be a tell tale thing is it will have two crimps right here
and that’s a part of the old shaft seal. If you try put on the new shaft seal
and it’s not fitting that’s the reason. Make sure it’s nice, smooth metal. -The other piece of that shaft seal
is this white ceramic piece and usually you can just pull out
with your finger or you can tap it off from the backside with a flat
head screwdriver. Also, sometimes this white piece
will come out but the rubber won’t, so just make sure you remove the rubber
from the seal plate as well. Okay, so we’ve got the old shaft seal out. We’re going to go ahead and before we put
the new one in we’re going to clean out the seal plate and the shaft of the impeller
just to make sure there’s no debris or dirt in there. I just get an old rag and wipe it out. -If you’re ever not sure about
which shaft seal to use never hesitate to visit inyopools.com
or give us a call at 4078342200. We can almost always,
I will say 99.9999% of the time [laughs] we can figure out what pump you have
and we can get the right shaft seal for it. Looks like it’s spic and span right there.
-I think it’s ready to go. All right, we’re going to go ahead and press
this white ceramic piece into the seal plate. You can use a water based lubricant
if you need to, to press this in because I know it’s a little
hard or you can use a little bit of water. You just don’t want to use silicone or Teflon. It’s not needed. Also when you put this in you don’t want
to touch the white ceramic. You want to get a clean cloth and press it in.
So we’ve got our white cloth here. -Finder oils can degrade it over time
and then you’ll have another leak. -Here we go. [crosstalk] Just make sure
it’s all pressed in there and flush. All right, then we’re going to get
the spring portion and again you want this black smooth side to be pressing
the white ceramic so we’re going to go with the opposite side and press it
onto the shaft of the impeller. I’ll get started, get a rag and twist it on. There. All right so we’ve got the shaft seal
installed on these parts. Now what we’re going to do is start
to reassemble the pump. First, take the seal plate and pop
it back on here. All right then we’re going to go ahead and
again we stabilize the shaft from the back with that wrench and you take the impeller, thread it on clockwise here -Now, this is one style of impeller
they may have but something you might see in something like a Super II is this wearing. Not all pumps have it so we do get phone calls
from people who are saying, “I think I lost my wearing,”
and yet what do you have? You have a Hayward Super Pump? You don’t have it so don’t worry. But just let’s say if you have
a Hayward Super II, just be mindful when you take it apart
whether or not you do have this part. It just slides on, the lipped portion faces out, and then you would screw it on. -We’re tightening it down. You don’t have to really crank at all,
you just tighten it enough to where it starts to move
the wrench in the back. You don’t really have to crank it on, that’s it. After the impeller is on,
go ahead and put the diffuser back on, just align that properly, press it on. At this point, if you are replacing the housing gasket
or diffuser gasket, this is when you would slide those on
and lubricate those with a silicone or a teflon lubricant. Okay, now we are going to go ahead and
slide the motor back into the pump housing. There we go. At this point, we’re going to put the cover on. For you putting your electrical wires
back in, you would obviously do that first. Slip this on and then
we’ll tighten the two screws. -Well, that just about does it
for our shaft seal installation. If you have any questions,
leave a comment down below and if you just want to speak to one of us,
contact us at inyopools.com. Thank you for joining us. Bye.

Bernard Jenkins


  1. Great video, well explained but I do this type of service here in Brazil with various sizes of pumps and electric motors.

  2. this was EXACTLY the instruction I needed to fix my pump. Thanks guys!

  3. What are some signs of a bad capacitor? Excellent video. Thanks for posting.

  4. You guys made it look easy and entertaining. Keep up good work.
    But, noticed that you did not change housing gasket when you mounted pump motor.
    Aren't we supposed to change all parts i.e. gaskets, rings, O rings etc related to job once exposed? Even though used parts may still look good, it'd best to change them anyway to minimize chance of another leak and again bring pump motor apart when you did not have to.

  5. *IMPORTANT* Don't forget to purchase a gasket kit for your pump when replacing your shaft seal. It's always good practice to install new gaskets and seals when taking apart your pump. You can find Gasket Kits over on our website —> http://bit.ly/2ECFr7i

  6. Amazing video. I was searching for these kind of videos for a long time. Thank you. Well explained. Finally I understand clearly about shaft seal.

  7. Ok got an issue I think I have the super 11….my brand new shaft seal is leaking and I don't know why…

    I've taken this thing apart numerous times and back together but still leaks. I even bored a hole in the motor mount plate to use a borescope to see that INDEED the shaft seal is leaking.

    I have to take it apart one more time to see if the seal that is pressed in is spinning (I marked it)

    It seems to me that the graphite is not pressing onto the ceramic hard enough..Should I just buy another seal and try again?

    Also in the parts blow out https://www.poolpartsonline.com/p-31-hayward-sp2600-super-pool-pump-parts.aspx, there is a a slinger…what is that about?

    lastly why are there numerous impeller numbers for the various HPs?

  8. I must have an older version of this pump. Same impeller but mine has a plastic shaft which sheared off. Old design flaw?

  9. Very helpful and well-done video. Appreciated the acknowledgement of the difference in your working conditions to that of the typical viewer! Tip to others: a little water-based lubricant (I used U.S. Sealube) worked like a charm to get that ceramic/rubber seal part into place.

  10. part number/price/source for seal kit? if i missed it, my bad. if you did….

  11. Hey guys for a 2HP Hayward what kind of shaft seal I need??

  12. What happens if you're an idiot and put Teflon lube on your motor shaft seals where you aren't supposed to touch? Can I somehow clean them and still use them? Only ran the pump for about a minute.

  13. Good video, except for only a few buck more replace diffuser seal and hosing seal while you have it apart. All comes in a "seal kit".

  14. Extremely helpful and informative. I was stuck with a shaft seal installation but your video explained what I needed to know. My pump is not leaking anymore. Thanks a million!

  15. Hi, can you tell me how you test the pump for leaks after you've fitted the new seal?

  16. Thank you for helping me understand my leakage problem. Pool guy coming to fix! You guys are awesome! 👍👍

  17. Great video, very well thought out, organized and detailed. You guys saved me from a lot of head scratching time, I appreciate your help by putting this video together and sharing.

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