Steps to check and replace well pump

Help Support Plumbing Forums:

Twowaxhack

Professional
Professional
Joined
Feb 9, 2021
Messages
4,859
Reaction score
2,163
Location
United states
I have a friend that his well pump quit pumping water. That’s all the info I have other than this pic and my friend says he smelled burnt motor smell.


What steps would you take to troubleshoot and replace if necessary. ?
297D5295-2377-4449-A72A-1908DC778B92.jpeg
 

Valveman

Pump Controls Tech
Professional
Lifetime Supporter
Joined
Jan 6, 2010
Messages
1,046
Reaction score
257
Location
,Lubbock, Texas
Probably a burned starting capacitor. That little half round cover on the right side of the motor is where the capacitor is. If you have 230V to the motor as was said, the next step is to change the start cap. Could also be a bad pressure switch. Both of those things and many more problems are caused by the pump cycling on and off too much, which is the most common cause of pump failures. When you get it running again, you should address the root cause which is the cycling.

 

Twowaxhack

Professional
Professional
Joined
Feb 9, 2021
Messages
4,859
Reaction score
2,163
Location
United states
I’ve looked everywhere for a parts breakdown showing a start capacitor.,

no dice. I can’t find it anywhere.
FFE3A9F0-F928-4FA6-9621-36AD5AA8BB5F.jpeg
I was going to buy a capacitor to take with me. It’s out the damn country where you can’t buy anything.

We tried to get every well company around to work on it, everyones busy.
 

Twowaxhack

Professional
Professional
Joined
Feb 9, 2021
Messages
4,859
Reaction score
2,163
Location
United states
Well repair guy ended up making a service call and says the motor is burnt up.

I’m going to my friends house tomorrow for something else, so while I’m there I’m going to look at it.
 

Valveman

Pump Controls Tech
Professional
Lifetime Supporter
Joined
Jan 6, 2010
Messages
1,046
Reaction score
257
Location
,Lubbock, Texas
Still bet it is just the capacitor. Ohm the motor. If it shows a short to ground or an open leg you will need a new motor. If not, try a capacitor. Either way start capacitors and motors are both burned up because the pump cycles on and off too much.
 

Twowaxhack

Professional
Professional
Joined
Feb 9, 2021
Messages
4,859
Reaction score
2,163
Location
United states
Still bet it is just the capacitor. Ohm the motor. If it shows a short to ground or an open leg you will need a new motor. If not, try a capacitor. Either way start capacitors and motors are both burned up because the pump cycles on and off too much.
You have any idea what capacitor it takes ?
 

Valveman

Pump Controls Tech
Professional
Lifetime Supporter
Joined
Jan 6, 2010
Messages
1,046
Reaction score
257
Location
,Lubbock, Texas
AO Smith motor model K48N2FC4C1. I have tried looking it up three times and keep getting side tracked. But it isn't easy to find as it hasn't popped up for me yet.
 

Valveman

Pump Controls Tech
Professional
Lifetime Supporter
Joined
Jan 6, 2010
Messages
1,046
Reaction score
257
Location
,Lubbock, Texas
Did find that AO Smith is now Century motors. Getting closer to a capacitor.
 

Twowaxhack

Professional
Professional
Joined
Feb 9, 2021
Messages
4,859
Reaction score
2,163
Location
United states
Anyone who can walk me through the steps of changing this well pump I would appreciate it.

We have a brand new pump just like you see in the pic to replace it with.
 

Valveman

Pump Controls Tech
Professional
Lifetime Supporter
Joined
Jan 6, 2010
Messages
1,046
Reaction score
257
Location
,Lubbock, Texas
Cut the discharge pipe loose. Disconnect the wires. Take the bolts off the casing adapter and pull up.
 

Twowaxhack

Professional
Professional
Joined
Feb 9, 2021
Messages
4,859
Reaction score
2,163
Location
United states
Then just replace the seal and throw on the new pump and bolt it up ? What torque ? Is there a spec or just damn tight ?

Then follow the prime directions.......

Set tank pressure to 2lb lower than cut in pressure ?

Of course wire it up.

Anything I’m missing ? I’m more concerned with how the pump attaches to the well. I dont have any experience with that.
 

Valveman

Pump Controls Tech
Professional
Lifetime Supporter
Joined
Jan 6, 2010
Messages
1,046
Reaction score
257
Location
,Lubbock, Texas
Quit just before you twist off the bolts. Lol! There is an inner and an outer pipe. Just replacing the pump and motor might be best to just unbolt the upper flange.
 

Valveman

Pump Controls Tech
Professional
Lifetime Supporter
Joined
Jan 6, 2010
Messages
1,046
Reaction score
257
Location
,Lubbock, Texas
Sorry. Looking back I see you are just replacing the motor. You should not have to disconnect the casing adapter to just replace a motor. Just remove the motor bolts and the shaft coupling to pull the motor off.
 
Top