Pump shuts off

chrisfrank

Member
May 23, 2014
6
maryland
I picked up a used (not old) pump motor today to replace a seized up one. Was told that it works, but when I start it, it runs normal then shuts down a few seconds later. Will restart after a couple minutes. Seems to run normal when running. There's an audible click when it shuts off. I'm concerned its overheat protection, but it doesn't feel warm at all.
3\4 hp pump
 

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Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2014
31,661
Texas, San Antonio/Marion, South-Central Area
Pool Size
17888
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-45 Plus
I would look for two things:
- Make sure you have the proper voltage wired for that motor; this one appears to be 115V
- Perhaps it's the run capacitor; relatively cheap and easy to replace
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
26,454
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Your signature says you have a 1.5hp Hayward pump. The motor is 3/4HP. You are probably overloading the motor with the pump having a 1.5HP impeller. The motor is mismatched to the pump.

Change the motor or change the impeller.
 

chrisfrank

Member
May 23, 2014
6
maryland
Your signature says you have a 1.5hp Hayward pump. The motor is 3/4HP. You are probably overloading the motor with the pump having a 1.5HP impeller. The motor is mismatched to the pump.

Change the motor or change the impeller.
I thought that, but my last pump was actually a 2 speed. It ran at 0.5 or 1.5 hp, so I assumed that it could handle it. If that not correct?
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
26,454
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
What model number Hayward pump did you start with?

@JamesW
 

chrisfrank

Member
May 23, 2014
6
maryland
What model number Hayward pump did you start with?

@JamesW
The 2 speed pump was PE71-III-H. I used the same impeller and basket, just swapped the motor. (I made this acct years ago and haven't updated my profile).
If I run the motor disconnected from the impeller, should I expect it to not overheat? Assuming the mismatch is the problem.
 

JamesW

TFP Expert
Mar 2, 2011
25,896
I thought that, but my last pump was actually a 2 speed. It ran at 0.5 or 1.5 hp, so I assumed that it could handle it. If that not correct
You're running at full speed, so you need the higher hp.

The lower hp only applies if you are running at low speed.

Do you have a picture of the original motor label?

What is the supply voltage?
 

chrisfrank

Member
May 23, 2014
6
maryland
You're running at full speed, so you need the higher hp.

The lower hp only applies if you are running at low speed.

Do you have a picture of the original motor label?

What is the supply voltage?
Don't have a picture of the old motor. Running standard 120v.
 

JamesW

TFP Expert
Mar 2, 2011
25,896
The new motor has to have the same total hp as the old motor.

Total hp is the label hp x the service factor.
 

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JamesW

TFP Expert
Mar 2, 2011
25,896
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