EHCS - electric motor - BMW Luxury Touring Community
 
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post #1 of 3 Old May 11th, 2014, 6:39 am Thread Starter
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Question EHCS - electric motor

Hi all

I've been faffing around with my stands for a couple of months now. I've refilled the oil a couple of times in the past, but this time I thought I'd do a proper job and hopefully it'll last for a few years. So far, I've had all the heavy bits powder-coated, which look great, and I've rebuilt the hydraulic jack with new seals and piston courtesy of John Z.

However, when I hook it all up, it's dead. I'm getting 12V at the motor socket (and the battery is good). I removed the motor from the pump and tried it on its own - it didn't turn initially, but when I manually span it it started running, but very quickly everything got v hot and a puff of smoke emerged from within.. Even 5 minutes later, when I stripped it, there was still enough heat in the windings to make it almost too hot to pick up.

Admittedly the commutator was a bit greasy and dirty, but I'm thinking that if that was shorting out the bushes, the coils wouldn't get hot, right? I measured about 0.8 Ohm between each opposite pair of commutator bars. Is that right? That should give me about 15 amps, which seems high but not horrendous. I'm not sure what would be expected.

If I need a new motor, could someone give me the specs to search for (or a UK supplier) please?

Many thanks

Nick
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post #2 of 3 Old May 11th, 2014, 7:38 am
cws
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Re: EHCS - electric motor

http://www.emsglobaldirect.com/product.php?productid=27 US$51

http://www.stockers.com/index.php?dt=HS-50N US$69.95

http://www.motoelectrical.co.uk/type...er-ch80-elite/ Out of stock it seems but 44.80 UK pounds

http://www.ombwarehouse.com/Starter-...10-Spline.html US$39.90


add shipping...


hope this helps :-)
I usually buy 2 at a time.... lol

Chris
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post #3 of 3 Old May 11th, 2014, 5:28 pm
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Re: EHCS - electric motor

By the way Nick there should not be any oil or grease inside the motor. It will eat up the brushes pretty fast. Hope you find one over there. Check the gear area on the pump unit there should be a smear of grease but no oil. If there is oil then the seal on the gear shaft may be shot. One other thing on the motor there is a screw that ground one of the brushes and that can develop corrosion which will prevent the motor from running. remove it and clean it really good and put her back together. May do the trick.

John
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