ok so with all the weather around of course the wiper motor started playing up. Something in the gearbox wasn't right so I got it off and pulled it apart. Yuck.
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Ran it through the parts washer then the ultrasonic bath for about an hour all up, with a 50% degreaser solution heated to 50ºc. Nice.
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I didn't have any of the gaskets required so I designed them in Fusion 360 and printed them in TPU. Orange was already on the printer, so they're orange.
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Only one problem: the phenolic gear on the pinion is stripped, so its not working still. I reassembled it all and put it back in the car so I can at least wipe the window manually.
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I cannot find anywhere online that has these gears - anyone know of a supplier that carries them? Secondhand motors are ludicrous money so buying one for parts is out of the question. I have one of the cheap chinese knock offs on the way so I have something that works, but would like to repair the original one properly if its possible.
Cheers,
Adam
[edit: PS I have to make some minor changes to the gasket models so they fit better, once that's done I'll be putting them on my thingiverse page for anyone to use. Watch this space if you want them]