Brake adjusting bolt has sheered off.

[daniel.bangham]

Has anyone had any experience of removing and replaceing the brake shoe adjusting nut/bolt assembly? It looks like the adjusting cam has an integral stud that comes through the backplace, a spring and cover is then slipped on and a nut locked in place by riveting the end of the stud over. Does that sound right?

[simonandjuliet]

I think that it is very similar to the Aprilia

I have replaced them by tapping or drilling out the dowl that goes through the nut (not riveted on Aprilia and I think the same on Augusta). But if the nut has sheared that won't be an issue ...

Much easier to remove the back plate and do on the bench

Good luck

[daniel.bangham]

Perfect. Thanks. The picture explains it all. It looks like I just need to replace the shaft part of 31-3463. I do wish Lancia had not made the brake drum integral with the hub, I hate using the force needed to remove the bearings, just to get to the brakes.

[simonandjuliet]

And a couple of real-world photos

NB the nut and shaft are marked in order to show which direction the pin was pushed in so you know to push it out from the other side ! Very Lancia

[tzf60]

Such a simple - yet valuable - indentation!

[chriswgawne]

Aurelias have a similar design of brake shoe adjuster but I have never seen (or should I say noticed) this feature.
I will go and investigate some complete backplates I have on the shelf.
Chris

[simonandjuliet]

I checked another dozen or so and all the same .... plus the Appias have the same thing, so be interesting to see if Aurelias are the same

[chriswgawne]

Here in Sunningdale on my shelves I have 3 pairs of single leading shoe Aurelia backplates ( thats up to and including 4th Series B20/B12) on my shelf  - 2 pairs are for 300mm i/d drums and 1 pair is for 280mm i/d drums so in my case the smaller ones would fit 1st series B20 and B21 i.e earlier cars than the larger ones.
There are no guide marks on any of the front brake adjusters on these backplates as seen in Simon's photos and its actually mighty  difficult to see the witness marks for any of the dowels. They all seem to have been finished off very cleanly and presumably Lancia thought they would never need to be extracted.
Apologies for the poor quality of my photos but attached are a couple of one of the adjusters on the 280mm dia backplates which shows the dowel goes in (and comes out!) in only one direction. Tbh up until now I thought the dowels were parallel sided and could be driven out in either direction. What a mess I would have made if I had started at the wrong end.
Another small piece of Lancia knowledge and a little disappointment for me as I wish the detail showing the correct direction had been there.
Chris

[daniel.bangham]

I can confirm that my Belna has the same pin mechanism. Although I had no need to remove the nut, I attempted to punch the pin out, but failed. The end of the stud has been peined over, which seems to have secured the pin in place. When I have removed the cam inside the drum, I will report on how  I think it will be safe to repair it. Unless the cam is something that can be found as a spare part. Question; does anyone have a damaged back plate which could donate the cam mechanism?