DS No Go

[Ribber]

Originally Posted by NoleFan4Ever

I would re-read my directions and do them as stated and then draw the correct conclusion.

Voltage dropped some, but did not go to 0 on M- and B- depressing pedal. Lowest reading I got was 34.5v

But, the 'bench' motor test has me puzzled. With 12v applied it did not turn. I would think 12v directly to motor it would spin? That removes the pot, controller, etc from the equation, right?

[NoleFan4Ever]

No, you are only applying 12v to a 48v motor, but regardless of that you should still get movement. And there is a problem for sure in your potentiometer so there lies your biggest problem at the moment. You start at the front and work to the back...

Be sure you used the correct Sepex or Series test on the motor....

[Ribber]

Originally Posted by NoleFan4Ever

No, you are only applying 12v to a 48v motor, but regardless of that you should still get movement. And there is a problem for sure in your potentiometer so there lies your biggest problem at the moment. You start at the front and work to the back...

Be sure you used the correct Sepex or Series test on the motor....

When you say potentiometer, I assume you talking about the MCOR under the floorboard?

[NoleFan4Ever]

Originally Posted by Ribber

When you say potentiometer, I assume you talking about the MCOR under the floorboard?

Yes, it serves as a potentiometer for your throttle input (Motor Controller Output Regulator). There is also a MS in there that has to make as a permissive to your solenoid closure....

[Ribber]

Originally Posted by NoleFan4Ever

Yes, it serves as a potentiometer for your throttle input (Motor Controller Output Regulator). There is also a MS in there that has to make as a permissive to your solenoid closure....

Tapped motor with a hammer while pressing pedal and the motor is working again. Can't believe I didn't think of that before now.

1. Do you still think I have a pot issue? Drove it around a bit, no issues.
2. What should I do about the motor?

[NoleFan4Ever]

Originally Posted by Ribber

Tapped motor with a hammer while pressing pedal and the motor is working again. Can't believe I didn't think of that before now.

1. Do you still think I have a pot issue? Drove it around a bit, no issues.
2. What should I do about the motor?

Then your brushes are sticking and probably about worn out.... Pull it and inspect it.

[Mooncarter]

Originally Posted by NoleFan4Ever

Then your brushes are sticking and probably about worn out.... Pull it and inspect it.

[Raystar57]

Originally Posted by NoleFan4Ever

Then your brushes are sticking and probably about worn out.... Pull it and inspect it.

I agree.
You may have some heavy wear on the comutator also. This can be corrected.
Lest see some motor brush plate pics and the comutator area on the core.

[Ribber]

Put a brand new Admiral MOT-A1 on today and it still won't go.
I was able to get it going yesterday by tapping old motor with hammer, so now I'm really confused.
Checked and double checked cables to be sure I didn't get them crossed (took a pic prior to removing old motor).
Checked B- and M- again and voltage does not drop to 0 with pedal depressed. Even with a possible pot issue, will the new motor still not at least spin?
I have a MCOR4 that I got from a member here, but haven't put on. The connections are different and I just never put it on.

[Mooncarter]

Are you TESTING the new motor or trying to use it with your components?