wiper motor question

rsporsche

rsporsche

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okay guys, i decided i was going to cleanup my wiper assembly and repaint everything, change the bolts + gaskets while i was there. so i got everything apart pretty easily, but as i was disassembling the wiper motor i watched the brushes pop out ... and before i did anything else, the question became ... okay dumb-ass, how are you going to keep these 3 brushes back so you can get it back together. so that is the question for today ... once apart, how in the world do you get it back together?

appreciate any insight into this.
 
I've done 2 rehabs of these motors, do you have a pic of the issue? I don't recall the brushes being a problem
 
I didn't take my motor apart. But if you put even a 1/3 of the Patience you used to assemble those awesome spreadsheets I'm sure you'll get it. ;)
 
You have to push them back out of the way of the armature...

You could probably also try taping them in place and the pull the tape out after the armature is in.
 
ScottAndrews said:
You have to push them back out of the way of the armature...

You could probably also try taping them in place and the pull the tape out after the armature is in.
Click to expand...
that was the first thing that i tried - pushing them back and getting the armature between them ... didn't work
then i tried taping them - didn't work either. the next idea is to pull them out with thread so i can get it inserted between the brushes and pull out the thread.
 
Hm, Like Steve I also can't recall having issues with the carbon brushes.

Looking at my pics, i thinks there's just one way to do it: Install the rotor first into the section with the brushes, and slide the black housing over your assy. This gives you full access to manipulate the brushes around the copper segments on the rotor. You may get soem difficulty aligning the end of the rotor axle to catch it seat deep inside the housing, as the permanent magnets will likely pull the rotor to one side.

I must have managed it somehow without too much fuss, otherwise I'd have a picture from that build step... and I do not.
20200615_211847.jpg


If this doesn't work, then you may pull the plate with brushes from it's housing; i see in my pics that it has some freedom, while still being attached by some wires. This may just give you enough room to slide the plate with the 3 carbon brushes over the axle. But I'm not sure if that will work.

Last resort would be to unsolder the 2 brown wires, and stacking everything up with the black housing on the bottom, drop the rotor in, place the plate with brushes, feed the wires through the alu housing part, and drop the alu housing part over the axle to sandwhich the plate with brushes. But I'm sure i didn't do it that way.

20200615_235515.jpg

Here's some pics with other views of the parts involved.
20200615_211855.jpg

20200616_000103.jpg



20201024_005233.jpg
 
Last edited:
okay,

i solved the puzzle - i used 3 pieces of kitchen twine / thread (a coarse thread) and tape. i looped the thread around each brush, pulled it back and taped the thread (under tension) to the housing. once all 3 brushes were pulled back, i inserted the 2 pieces and it went back together - then cut one side of the string and pulled the string out.

once you are ready to bolt the 2 pieces back together, i recommend that you use a magnet to hold the locking plates in place while you insert the screws. the first time i tried to hold it in place with tweezers and it ended back inside ... so took it apart and 3 more pieces of string + tape and its now all back together.
 
I use fishing line in situations like this also, low profile and you can pull it out with little resistance because it is nylon.
 
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