Wipers!

[Mark-ixql7]

A bit of background: I have the upgraded motor from motaclan. It's a couple of years old now. I fitted a new park switch at the same time.

The other day the wipers decided to play up. They'll wipe across the screen fine, but on the return they'll get stuck and shimmy back and forth a millimeter forever. I can push the wipers back, but they're still shimmying back and forth slightly most of the way. After a search I've just taken apart the park switch and that looks brand new inside, so I'm assuming it's not that?

I can try and get a video later if that would help

Does the fact that it does the forward stroke absolutely fine suggest it's not likely the cable of wheel box (I hope!)?

Cheers
Mark

[PabloGee]

I don't know, but a recent thread on here was someone installing things slightly wrong and it chewing up the big gear wheel in the box, especially with the upgraded motors.
The expert is 'Adrian@' on here, he has repaired many of these wiper boxes.

https://www.pistonheads.com/gassing/topic.asp?h=0&...

[Mark-ixql7]

Thanks. It doesn't seem like it's that, the teeth looked ok to me.



The cable moved very freely with no nasty noises or anything in both directions when I pulled it out to remove the cover for that picture. I guess that probably means it's the motor itself?

Here is a short video of what it's doing

https://youtu.be/Nzhxkr-jqWQ?si=OcdoHAtMWKUZSNz5

Edited by Mark-ixql7 on Tuesday 22 April 18:47

[Adrian@]

Having purchased an upgrade motor and installing it to run in reverse, it has/is damaged/damaging the park switch (IMHO, it needs replacing as you have taken it apart) and the armature has wiped the teeth off centre line of the gear, (your video is you forcing the arms to engage into undamaged teeth, your picture shows the armature having spun through the gear, having ground the centre line off the teeth). It needs stripping down, cleaning/preparing/bearings and pivot replacing as required, new OE gear with OE rivets, new 29W park switch and setting to run the correct direction. The parts above the gear, (which is free), assuming the gearbox casing/upgrade parts are still serviceable/is in good order, as then if not it is easier to rebuild it as an OE Lucas motor. A@

Edited by Adrian@ on Wednesday 23 April 16:00

[Mark-ixql7]

Thanks Adrian. The terminology has gone over my head though sorry! The armature is the screw part of the motor that's meshing with the gear right?

What is it that determines whether its running in reverse or not? i.e what is it exactly that I need to fix to make it run the correct way?

Edited by Mark-ixql7 on Wednesday 23 April 15:43

[Mark-ixql7]

You are a wizard good sir! Upon removing the gear it is basically as bad as the one in the other post



Edit - The bearings on the front and back spin smoothly with no play that I can detect. I put the gear back in without the motor and that also spins freely but with a tiny bit of play. The brushes look to my untrained eye like they've got loads of life left. I tried getting the motor out of the casing to have a look at that but the magnets seem very strong and I don't want to break something. The ends of it still look brand new to me.

So, clean up all the grease and put some fresh stuff in, new park switch, new gear and set to not go in reverse and I should be good?

Edited by Mark-ixql7 on Wednesday 23 April 16:51

Edited by Mark-ixql7 on Wednesday 23 April 18:09

[Mark-ixql7]

Quick update. I now understand that changing the direction is simply a case of rotating the yoke (what I would have called motor housing) 180 degrees. It now turns clockwise, which I think is correct based on the other thread.

I sketched and 3d printed a new gear (in PLA, but have PETG-CF if it doesn't hold up well). I haven't reinstalled in the car yet, but it seems to fit very nicely in the gearbox at least. Here is what I made incase it helps anyone out

https://www.thingiverse.com/thing:7024128



https://www.youtube.com/shorts/TR9O8p_cdoE