problem as a mystery

Not if you don't know...

Go buy a new one, they're cheap enough.

John.

After reading your thread what I understand is that you do not have even the basic idea of an electric motor . How do you expect to rewind a motor.Better get the help of an armature winder or get it done in a motor rewinding shop. Or buy a new one.

You don't have to be an electrical engineer to rewind a motor. In my workshop un skilled workers wind it on a winding machine and final connection they do with the help of an armature winder. These unskilled workers learn to make coils as a replica of original winding wire size , number of turns on each coil and shape and size of coil and the coil connection . These data is collected before cutting the damaged winding . Then they cut the coil , clean the slots and wind the new coils exactly as the original one and place them in the clean slots and connect as per original connection.

Generally, they do not rewind fractional HP motors. The end price would exceed the price of a new one. Drop a couple of hundred and get a new one.

Hi T Man,

You are right . I know it is not worth trying to rewind the fractional HP motor in US. But it is economical and possible in India or other Asian countries. Last week I got rewound, a 3 speed 60 watts fan motor for Indian Rs. 450.00 ( approximately US $ 10.70 ) where as a new one was costing Indian Rs. 1500(US $ 35.70 ) .

My own experience in NJ ( US ) was an example . My microwave went bad and on checking it was found that the magnetron tube is damaged and for replacing charges was US $ 160 ( the magnetron tube itself was available on e bay at the cost of $70 where as I got a new microwave oven for $80)

What I mean to say is the repairing and use and throw depend on the labour charges of the country

The joke is that we are all talking but the person who raised the thread is missing.

Hey VI

Thanks for the info.

Enough said on this, If it's less that 5 hp trash it and get a new one.

Hmmm... can't tell from Ali18's (lack of) info just where-in-the-world he resides... sooo...

I'll assume that he doesn't have ready access to a new/replacement motor. In which case, I concur (with V.I., post 2) that you could certainly rewind this yourself, given the ability to 'burn-out' the old windings, determine the gauge(s) of the wire used, and counting the turns in each coil, while taking meticulous notes as to the connections between same. The "bible" for motor-rewind shop employees (when I worked in one) was: ...(click link)...

Rosenberg's Electric Motor Repair

Granted, it costs more than a new pump in all likelihood... but, who knows (here)... without more info on the O.P., the suggestion that such a reference might be a worthwhile investment for a group to purchase together, for future repairs to other such equipment might conceivably pay off.

Wishing you success with your endeavors ~

I hope he has an oven large enough and hot enough to set the epoxy in the windings. With out smelling up the house too. And because we know the out come of this one lets have some fun with it. I wonder if he can wind it to a inverter duty rating and have it chromed ? Not to make light of any one seeking answers, I have questions everyday. The proper answer has been given, now is the time for fun!

"Sorry..." Just got around to re-reading your response, here, as well as your O.P., in which I had originally MISSED the statement:

"...without nameplate nor coils (wires) inside the pump slots that are 24."

That leaves you sort of between the proverbial "rock-and-a-hard-place"... Once upon a time, there were EASA reference books (Electrical Apparatus Service Organization) that had winding data for hundreds of types of rotating equipment and transformers.

They seem to have drifted into obscurity, since my rewinding days (early 80's). Your best bet, if (for whatever reason) you have a true need to get this particular unit rewound, is to do a careful photo or two, and post them on various forums asking if anybody recognizes it or can identify the manufacturer.

Any good, reputable shop (with a history) should be able to do a satisfactory job if they know the unit's duty, etc. ~ but it sounds as if you may have more questions YOURSELF...(?) Is this a submersible (sump-type) water pump, a well-type pump, a solar-hot-water-recirculating pump (like a Grundfos), or what?

You stated: "a small water pump with capacitor (roughly 1/2 Hp)" ... but without knowing (for starters) whether the cap is a start-cap or a run-cap, you're at a standstill . Is there a centrifugal switch involved...? Or, could IT be missing too (like the windings!)? ... Get some photos (appropriately-sized, clean surroundings, well-lit, with "just-what's needed" cropped for viewing), and post them...

Also do a search and send description and photo(s) to a few shops, e.g., A.R. & E. and ask what their suggestion would be {some can be friendly, others very 'tight-lipped'}.

Just something else from the "For what it's worth" department...

Good Luck ~