30 replies to this topic

[sibhs]

Hi Guys,

 

Thought I'd better check my wiper motor out, not the sort of thing you want to play-up when the build is finished.

 

Pulled the guts out of it and found the gear cracked  but still working fine, what are my options here?

I'm thinking of glueing it.

 IMG_2882.jpg   53.09K   15 downloads

Also found this piece of copper floating around the casing. 

 IMG_2884.jpg   64.68K   12 downloads

This is where I think the copper should go, can I just solder it to the metal tab? Can anyone confirm this position please.

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Most people may say get another one but I would imagine most of them would be starting to fail after 40 years.

 

 

Cheers

 

Marty

[dattoman]

Might get lucky and its the same size and teeth as a yankie one

Depends on the brand of the motor though

[Ice]

Hey marty is it a preslite or lucas

[sibhs]

 ImageUploadedByTapatalk1368571063.819847.jpg   102.02K   11 downloads
Hi Gene and Neil, it's a Lucas.

[orangeLJ]

Be careful if you pull the motor cover off, the brushes are spring loaded and can be a pain in the arse to get back in without damaging (ask me how I know.....)


Cant help with the copper connector, But if it was me, I'd be using some araldite (2 part epoxy type resin) and carfully filling over the cracks in-situ.

Removing the gear is probably going to crack/break it further.

[r2160]

you might be able to get somebody to machine you up a new one out of delrin. Given the cnc shops out there, I wouldnt have thought it would be a bit deal for somebody and once the program is written, they can make as many as they like.

 

cheers

Glenn

[Ice]

I might have spare one here marty would have to check and let you know in a day or so
finding anything in my garage is a mission in its self

[sibhs]

Can anyone confirm the position of the copper tab?

 

I've already pulled the motor out and got it back in twice, yes it is a PITA getting the bushes out the way.

 

Thanks for the replies, I'll probably try the repairs and see if Gene or anyone else has a spare then choose the best option.

 

Thanks

 

Marty

[hanra]

Mine broke exactly the same as yours, Id have to try and find the posts I made about the repairs.

[REDA9X]

I've tried gluing them, but years and year of grease soaking int them it just doesn't work. Plastic weld is the go

[Ice]

I have a preslite one here and the gear is not cracked but i dont know if its the same size as the lucas one marty

[Potta]

3D printing an option for the future maybe?

 

Still pretty new technology and I can't imagine it would be cheap but may be worth looking at for some of those hard to get parts.

 

http://www.rapidmodels.com.au/

[StephenSLR]

Also found this piece of copper floating around the casing. 

 

I believe that piece of copper is responsible for the wiper blades returning to their resting position after you turn off the switch. You've probably noticed when you switch them off the wipers will stop where they're currently situated on the windscreen.

 

s

[hanra]

^ Thats right, its for the parking function. I made up a new contact, soldered it in place etc if I remember rightly. Works well.

[sibhs]

I have a preslite one here and the gear is not cracked but i dont know if its the same size as the lucas one marty

Thanks Gene, any chance you could post a pic of it? See if it looks the same.

[EunUCh]

With the cracked gear you can cut some small sections of spring wire and put a 90 deg. bend at each end, sort

of like the shape of a staple then melt them about half way into the gear at 90 deg. to the split with a soldering iron.

Melt them in then smooth over the plastic with the iron,dont sniff the fumes.

With the park tang that is broken I would be inclined to make a new one and drill out the rivet to fit it

into position,finding or making a new rivet is the hard part.

[StephenSLR]

the shape of a staple then melt them about half way into the gear at 90 deg. to the split

 

Interesting.  Do the ends of the 'staple' go into the plastic (as if stapling into it) or do they lay flat on the plastic before welding it in?

 

s

[EunUCh]

lay it flat then melt it in and "lay off" the plastic that is displaced back over

where the "staple" went in.

[sibhs]

 ImageUploadedByTapatalk1368957657.221007.jpg   66.55K   8 downloads
Thanks for this pic Gene. Unfortunately it is very different and won't work.
Great to hear all your ideas for fixing, keep them coming. I hope to get a freebie broken one to use as parts or try these repairs on.
Let me know if anyone has a Lucas taking up space.
Cheers
Marty.

[sibhs]

Bought another motor and stripped them both using the best bits.  My casing and motor looked the best so I used the cog and electrical connector from the other unit.

 

I did solder the broken copper tab off mine just to see if it would work and it seems ok.

 

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 IMG_3101.jpg   49.24K   9 downloads

 

Pic of the bushes that cause trouble when re-assembling.  I did it by fitting the motor and easing the bushes back one at a time then fitting the motor cover.

 

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Motor and cog for reference.

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 IMG_3105.jpg   48.72K   13 downloads

 

Marty

[StephenSLR]

Good work, I remember fixing mine as a teen when I got the housing chromed.  You have to watch those bushes, somehow mine popped out during installation and when the motor ran they snapped in half.

 

Still I'd piece them back, slide them down the grooves (in two pieces), it'd actually work for a while then stuff up when I needed them most.

 

Got a replacement motor, has worked fine since.

 

s

[hanra]

You have to watch those bushes, somehow mine popped out during installation and when the motor ran they snapped in half.

Brushes guys.