PB4 Booster Pump Troubleshooting

poolmom314

Member
May 19, 2012
19
I hope someone can guide me on this one.. I have a Polaris PB4 3/4 hp pump for the cleaner. It is 7 years old, so maybe it has already lived its lifespan. It worked great yesterday (first timethis year) and now it just hums for about 30 seconds then shuts off. It gets hot too. My pool guy happened to be here and opened up the back and said maybe the ? brushes were gone, don't know what that means, however, he did say to get a new motor and he would install it. I checked online and a new motor was around $150-$160 and I found a new PB4 for just under $200.

So, is it really the motor?
Should I try something else to trouble shoot it?
Should I just order a new one?
 

Bama Rambler

Mod Squad
TFP Expert
Bronze Supporter
LifeTime Supporter
Jun 22, 2009
23,369
SouthWest Alabama
Those motors don't have brushes. Just to give you an idea how astute your pool guy is.

If you take the back cover off and you can spin the shaft easily it could be the capacitor.

Did you try looking for the switch contacts referenced in this thread?

If it is the motor, I'd just get a new pump since the cost is so close between the replacement motor and a new pump.
 

poolmom314

Member
May 19, 2012
19
Thank you! I will search the thread now...
The pool guys kill me. I am so thankful I found this forum...
 

findog42000

Member
May 24, 2012
15
Dallas, TX
I'm not sure where you live, but I would recommend craigslist.com for finding a replacement pump. You'll often find people moving and looking to unload their pool pumps/equipment for cheap...sometimes even FREE.
 

poolmom314

Member
May 19, 2012
19
Thank you for all your help...I replaced the Capacitor and VOILA! it works perfectly! Thanks again!