Northstar pump motor replacement

[masksav]

HELP! I'm new to the forum so please be gentle.

Here's my problem
My pool is now 8 years old. When it was built, the builder installed a Hayward Northstar pool pump. The pump itself has been ok. My problem is the pump motor was replaced 3 years ago due to bearing failure. Well it's done it again. The bearings are whining away and I'm sure the motor is not long for this world. I've found replacement motors on-line for $265.00 + shipping ($29.95)
My questions are
How difficult is it to change-out and how do you change it out? (I'm fairly handy)
Do I need any additional parts? i.e. seals, impeller, etc. If so what do I need?
What can be done to extend the life of the motor?
Anything I'm missing or need to know?
The 3 year old replacement motor is a A.O. Smith Century Centurion USN 1202 2 H.P. it has the part number of 7-193687-02
Thanks in advance for your replies

[mas985]

Replacing a motor is not too hard but you should be familiar with electrical wire and proper handling of electricity before attempting something like this. The only things you need are the new motor and a seal kit.

As for preventing this in the future, you need too give us some details on your setup and location. Location can be important if you winterize and are not pulling the pump each winter. Your setup can be important if there is a reason the pump is operating too far outside the best efficiency point. So questions:

Location
Do you winterize and if so, what do you do with the pump
Pump Model#
Height of pump relative to the pool water level
Diameter and number of individual suction pipes from the equipment to the pool
Diameter and number of individual return pipes from the equipment to the pool
Diameter and number of return eyeballs
Distance from the pool to the equipment
Filter type and backwash valve model if known
Filter PSI with a clean filter.
Heater - yes or no
Pool/Spa Valve - yes or no (If there is a spa, the number of jets and size)
Check Valves - Number and locations

[masksav]

[ broken quote removed -- moderator ]

Thanks for getting back with me so quickly. I have no issues with working with electricity my only problem is how to put on the seals in.
Here's the info on my pool

+ Location - Central FL Orlando area so we dont winterize pump runs 6 hours a day in the winter and 8 in the summer

+Pump Model# don’t know it's a Northstar 2hp

+ Height of pump relative to the pool water level - Don’t know but I have never had an issue with losing the prime or priming the pump and filter even after cleaning

+ Diameter and number of individual suction pipes from the equipment to the pool - I think 2"

+ Diameter and number of individual return pipes from the equipment to the pool - I think 2"

+ eyeballs - 5 in the pool and 6 in the spa

+ Distance from the pool to the equipment 20' est.

+ Filter type and backwash valve model if known Hayward quad with no backwash
PSI 24

+ Heater - Hayward heatpump

+ Pool spa - yes 6 1 1/2 "

+ Check valves????

I've been told by a pool repair guy that my problem is my roof runoff is falling directly on the motor and shortening the life. He suggested putting up a gutter over the pool equipment

[mas985]

The plumbing is a little on the small side for that size pump but nothing serious and not much you can do about is anyway. Because of the spa, I think you would do best with a two speed motor replacement of the same size and definitely build something to keep the water off the pump motor. The two speed will help save in energy costs and low speed is all your pool should really need.

[waste]

Welcome to the Forum!

Please listen to Mark!!

The Northstar is something of a "lemon" :( However, I've changed out a few dozen motors and will help you with the 'nuts and bolts' of the changeout.

Pick up a new shaft seal assembly (SPX4000SA2), trying to reuse one, no matter it's age is a very BAD idea.

My participation here is lower than I'd like, due to a computer hacker and a job I just started which has 'grueling' hours. I'll check in at least on the weekends and will assist you with the motor swap. :)

[mas985]

The Northstar is something of a "lemon" :( However, I've changed out a few dozen motors and will help you with the 'nuts and bolts' of the changeout.
I have two going on 7 years now without issue. Just curious what have you been experiencing?

[aylad]

and definitely build something to keep the water off the pump motor.

Mark, does this apply to normal rain, too, or just excessive runoff like the OP has?

[mas985]

My response was mainly because the OP thought it was causing the problem and he had runoff from the roof. Normally, rain shouldn't be an issue but if you have runoff from a roof, that can work its way into places it shouldn't be. The Northstar is a pretty well sealed pump motor so I am actually surprised they had this problem. Both of my pumps are out in the open but our rain is usually mild.

The OPs problem could also be poorly manufactured seals. If those fail, then the water will get into the bearings and they too will shortly fail.

[aylad]

. If those fail, then the water will get into the bearings and they too will shortly fail.


Yep, that's why I just had to replace my motor. Just checking to see if covering my motor somehow would make any difference in its lifespan. No runoff issues for me, though--there's nothing at all above my pump/motor, and it sits on a concrete pad.

Didn't mean to hijack the post--now back to the original poster's issues!! :)

Janet

[masksav]

I definitely have a roof runoff issue. The water runs off the roof and hits the back of the pump motor. To remedy this I have installed a 12' section of gutter over the equipment as well as I will be putting a motor cover on the new motor. The previous 2 motor died from bearing failure.
By the way I bought the new replacement motor and impeller kit with seals on E-Bay for $288.00 and with all the help you guys have given me it should be a piece of cake and I save $300.00 over the last replacement. So thank you all!

[PoolDoc]

My participation here is lower than I'd like, due to a computer hacker and a job I just started which has 'grueling' hours. I'll check in at least on the weekends and will assist you with the motor swap. :)

Good to see you back, Ted! Sorry about the computer problems!

[waste]

Masksav - glad you found a cheaper motor. If installing it gives you trouble, let me know and I'll proffer some tips:)

Ben- it's always good to be here! It was your e-mail that clued me into the hacker, THANK YOU! I think my system is OK, but there are a couple things going on that I'm not quite satisfied with, :mad:

Mark- when we first started installing the Northstars, ~ 1/5 had to have motor or seal replacements within the FIRST year. I had heard that the model was going to be discontinued owing to the troubles. That's why I said they were a ~ 'lemon'