On 7/24/2014 1:43 PM, Baron wrote:
amdx prodded the keyboard

On 7/24/2014 12:10 PM, amdx wrote:
I had a previous thread, but ignore it as I have the details
correct this time.

To start the motor did spin when powered.

I helped my neighbor disassemble a pump motor, we needed to hold
the rotor in order to remove the broken impeller, so we pulled the
stator off to get access to the rotor. We had to remove the
centrifugal lever assembly from the shaft in order to remove the
stator. We remover the broken impeller and reassembled the motor.
Reinstalled the centrifugal lever assembly and the switch the it
operates.

Now at power up the motor just hums.
The rotor spins freely.

We didn't unhook any wires, just pulled the stator off to get
access to the rotor. I marked the end plate and stator and put it
back together the same way.

Any ideas, why the motor hums.


I want to understand the operation of the motor.

First I'm aware of motors with a start winding, it is energized
until the motor spins fast enough to move the centrifugal lever
assembly which open the switch to de-energize the start winding.

On this motor the centrifugal lever assembly CLOSES a switch when
it gets up to speed. Opposite of what I thought would happen. The
motor has a start capacitor and another part I'm I not aware what
it is.
Here is a picture of the same type motor. In the picture the
wrench
is causing the centrifugal lever to swing and open the switch, it
can't be seen well in the picture.
Also the black part with three wires, white, yellow, and blue,
what is
it's function.

http://s395.photobucket.com/user/Qma...426fb.jpg.html


Thanks for your help,
Mikek


I think I have found the problem, not sure what I need to do to
fix it,
but it will become clear.
This website,

http://wetheadmedia.com/hayward-supe...bout-a-second/
indicates the switch is held CLOSED by the centrifugal lever, and
opens when rotated fast enough.
I have it assembled so the switch is OPEN and CLOSES when at
speed.
So either I reassembled the lever wrong or reinstalled it wrong, but
I think I have a handle on it now.
Mikek

The centrifugal switch always breaks the starting circuit when the
motor is almost upto speed and the other device looks like an
overheat/thermal switch. It should disconnect the power when it gets
hot enough to trip. Sometimes they self reset others have to be
reset manually.


Ok, got it working.
To remove the centrifugal lever assembly from the shaft, it needs to be
disassembled, because you can't reach the screw to turn it.
When I reassembled it, I put the weight on backwards.
Oh well, it's working now.
I'm sure glad, I ordered a $54 dollar impeller for my neighbor, and then
I couldn't get the motor to work again.
I was the one that convinced him to tear it apart and see what was
wrong, instead of buying a new pump.
The problem was the impeller was broken from the shaft.

Mikek