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Old 10-03-2013, 06:35 PM   #1
cableguy_hd
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Default Txt series motor rebuild question

So I don't hijack other motor threads thats been going on here I have a question. What does a company do differently when they rebuild a motor vs. me replacing brushes and bearings? Reason for this I have a local guy ( brother of a co worker) that has bought the business that he's worked at for years that can refurb my motor. It's a starter generator repair place. I was trying to throw some work his way. Just wondering what I may be giving up by not using PQ or another "hop up" type of place. I have a 96 so I'm sure anything is better than nothing.
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Old 10-03-2013, 06:53 PM   #2
Sir Nuke
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Default Re: Txt series motor rebuild question

Quote:
Originally Posted by cableguy_hd View Post
So I don't hijack other motor threads thats been going on here I have a question. What does a company do differently when they rebuild a motor vs. me replacing brushes and bearings? Reason for this I have a local guy ( brother of a co worker) that has bought the business that he's worked at for years that can refurb my motor. It's a starter generator repair place. I was trying to throw some work his way. Just wondering what I may be giving up by not using PQ or another "hop up" type of place. I have a 96 so I'm sure anything is better than nothing.
if you are wanting to just REBUILD your stock motor to stock specks.....that is what they do.....meger the windings.....clean the whole thing......new bearings/brushes, and some even paint them.

now you can not compare a rebuild to getting one of PQ's as its not the same thing.
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Old 10-03-2013, 08:14 PM   #3
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Default Re: Txt series motor rebuild question

If you decide to stick with stock, a rebuild is all you need. Really all you need to do is check the brushes. My 1998 brushes were still within specs. However brushes wear based on mileage, not age, so a newer motor could need brushes while and older one might be fine. Once you have the motor out, I figure why not replace the bearing.

PQ and others upgrade the motor to give you more speed or torque. Not sure if they can increase Hp?
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Old 10-04-2013, 04:30 PM   #4
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Default Re: Txt series motor rebuild question

I guess what I was asking was what do they ( after market motor builders...PQ D&D ) do differently to obtain speed,torque, hp out of a motor? Not wanting trade secrets or anything but I was just curious the difference in me replacing brushes, bearings over what they do
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Old 10-04-2013, 04:52 PM   #5
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Default Re: Txt series motor rebuild question

There are others far more knowledgeable than me, but I'm guessing they pull out the windings (wires) and replace them with ones that match your needs. There are two sets on windings in a motor, one set of windings attached to the body (field or stator) and one set on the rotating part, the rotor.

Since motors act kinda like transformers and have laminations or cores, I'm guessing that like transformers, it's not too hard to change the voltage and current, but your power (Hp) is not as easy to change, without eating into the safety factor.

JohnnyB will correct me if I'm wrong.
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Old 10-04-2013, 05:40 PM   #6
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Default Re: Txt series motor rebuild question

Yurtle has pretty much nailed it. Bigger wire in windings. More wire of the same gauge. Larger magnets, etc. The trick is not what they use to make a performance motor, but rather how they use it.
In simplest terms, the motor is an electromagnet inside a field magnet. The contacts of the spinning electromagnet are either attracted to or repelled away from the contacts of the field, (stable), magnet. If one makes both the field magnet and the electromagnet larger, it will increase power delivered. A rebuild just replaces what was there with new, equal items.

I repeat, this is the simplest of terms. Others are more experienced than I and they and/or my critics may want to go further in depth.
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Old 10-04-2013, 05:53 PM   #7
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Default Re: Txt series motor rebuild question

Thanks. And I was just talking about a series wound motor. I still don't fully understand shunt wound (SEPEX) motors.
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Old 10-04-2013, 07:08 PM   #8
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Default Re: Txt series motor rebuild question

simple terms are fine with me. my curiosity has been filled... Thanks
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