Need Info on old water pump

[DH12]

I dont know what Im doing. As you'll soon figure out from my story. (but I tried)
The short version:
I have a quarter acre, underground sprinklers, access to pond.
My 60+ year old 1 HP pump quit.
I bought a 1.5 HP, because bigger-is-better, right? Wrong.
It took me 3 weeks to hook it up. But I did it, and it runs fine, but only for 10 mins, then it overheats and shutdown. The new pump motor is so hot you cant touch it.
Whats wrong?
Im thinking, the out pipe on the pump is 2 inch, I have to reduce it down to half inch to connect to my existing system.
Is that my problem?
Do I need a smaller pump?
Do I need to match the old pumps HP? or the RPM? or the GPM? or all three?
Problem: The old pump doesn't show the GPM. And I cant find any info about it online.

All the info on the old pump is below:

Make: GE Jet Pump Motor
Mod: 5KC39RG432AX
HP: 1
HZ: 60
V: 115 /230
PH: 1
RPM: 3450
Code: J

Any idea why my new pump is overheating? Fix?
Any idea where I can find GPM for this old pump?
Any other forum I should post this on?

Thanks for any help.

DH

 

[Dave M7040]

The new pump looks like one for a pool system. Sucking water from the pool and sending it through a filter. Am I correct or just not seeing it completely. Is it a plastic body or a cast oion body?

Old pump body is much smaller and looks like it was designed to deliver high pressure which the sprinklers need and less volume. If ybu see the 40C on the old motor, it is telling you the motor is designed to operate 40C higher than ambient temp which is seriously hot. Not just to the touch but much hotter and be running fine.

Old pump motor would run on either 115 volt or 230 Volt. What was it running on?

Who wired the new pump and to operate at what voltage?

Did the old pump power all three sprinkler circuits at the same time? Is the new pump designated to operate sprinklers?

The centrifugal style of pump actually uses the most power when it is moving the most water. Block the water flow out and the amps used by the motor will lower.

How about some details on the new pump and motor.

Wiring it to operate on 230 volts and then supplying it with 115 volts will be seriously bad.

Dave M7040

 

[fried1765]

The new pump looks like one for a pool system. Sucking water from the pool and sending it through a filter. Am I correct or just not seeing it completely. Is it a plastic body or a cast oion body?

Old pump body is much smaller and looks like it was designed to deliver high pressure which the sprinklers need and less volume. If ybu see the 40C on the old motor, it is telling you the motor is designed to operate 40C higher than ambient temp which is seriously hot. Not just to the touch but much hotter and be running fine.

Old pump motor would run on either 115 volt or 230 Volt. What was it running on?

Who wired the new pump and to operate at what voltage?

Did the old pump power all three sprinkler circuits at the same time? Is the new pump designated to operate sprinklers?

The centrifugal style of pump actually uses the most power when it is moving the most water. Block the water flow out and the amps used by the motor will lower.

How about some details on the new pump and motor.

Wiring it to operate on 230 volts and then supplying it with 115 volts will be seriously bad.

Dave M7040[/QUOTE






I suspect that your pump IS wired for 240V, but your electric supply to the pump IS only 120V.
I am actually surprised though, that the pump would run for as long as 10 minutes with voltage that low.
Check the wiring hookup (240V v/s 120V) as described inside the pump pressure switch cover.