bosch motor repair question

[terryfl]

Hi All

I have a problem that I think someone here may well be able to solve just by looking at the photos.

I have 3 bosch motors from a mercedes car, one from under the seat (adjuster) and 2 from the steering column (tilt and fore/aft)

THe car was flood damages and had salt water corrosion. I have had a few of these before, taken them apart, cleaned them up, lubes and reassembled them and they all seem to come back to life.

Hwever 2 of my current 3 wil not work. They seem to have some extra electronic hardware on them.

I have attached links to pictures of all 3 motors. PLEASE can someone tell me why they are not working and what I need to buy to fix them, I'm assuming the parts would not be expensive but the steering wheel motors are really hard to find. I have spare seat motors but the spiral cog at the end is geared differently plus the steering wheel motors have 4 wires connected and the others only two (i'm guessing to sense when end of travel is reached but thats just a guess)

I'm only am amateur at electronics (as you can guess) but ok with mechanical stuff. I would be so very grateful if someone can help me solve this.

note: working motor has circuit from power point to center contact at both positive and negative, non working motor does not have complete circuit, I'm assuming that to do with possibly blown component/s

pictures are below

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor3-d.jpg

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor3-c.jpg

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor3-b.jpg

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor3-a.jpg

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor2-d.jpg

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor2-c.jpg

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor2-b.jpg

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor2-a.jpg

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor1-c.jpg

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor1-b.jpg

http://i886.photobucket.com/albums/ac61/terryferrari/bosch motors/motor1-a.jpg

thanks

Terry

 

[MikeHalloran]

It could just be the pictures, but I'm not seeing brushes on motor 2 or motor 3, and the commutators are not clean enough.



Mike Halloran
Pembroke Pines, FL, USA

 

[jraef]

Hard to tell on custom motors like that, but most likely the more complex ones might be what are called "servo motors" or something akin to them that have a shaft position monitoring device called an "encoder", used in conjunction with an electronic drive to position the connected device very precisely by counting pulses, without the need for external sensors. Anything like that would be highly unlikely to survive a salt water incursion. Simple DC motors can often be reconditioned to function after something like that, but not electronically controlled motors like servos. Also chances are if the motor got wet, so did the electronic drive assembly necessary to make it work, and that will be destroyed as well.

Electronics and water = no bueno...

"Will work for (the memory of) salami"

 

[terryfl]

thanks for the info, I will take it to a local motor repair store to see if they can shed some light

I repaired 5 more of the seat ones tonight, just encased in rust, all work fine, but these 2 are stumping me