Brake drum has a nice crack but slow speed drum shows only a small crack outside but nothing appears inside the drum.
Has any body tried to repair broken drums by brazing them ?
Would it be safe to use my slow speed drum ? What are the risks ?
I will not find any good used drum here in France and will have to by new ones from US.
Gears are good but sending the cores to US to have a new drum fixed on the gear will cost a lot. I will buy only the drums and rivet them on the gear or axle.
Is this difficult to do ? What are the tools needed and is there a special method ? How is the drum centered with the axle or gear ?
You will need access to a lathe and a press, the rivets are soft and press flat very easy, a lathe to turn the excess rivet down flat on the thrust face of drums. Centring is not hard, assemble drum to hub with nuts and bolts in rivet holes, check that all is true, then replace the rivets one at a time.
Transmission drums have been successfully welded or brazed in the past.
A few years ago I had the same problem. I tried to weld one of the drums but it exploded some time later and I made a total rebuild with new drums an bushes in the transmission. Yes it was not cheap but now the transmission and the car is running great .
To do it you need a lathe and a press.
Ci vous voulez plus d'explication, envoyez moi un Email.
Wonder how long this had been running?
Oops! Sorry Philippe,I missed your second post showing the cracked drum. I would certainly replace it. Having said that, I have seen cracks like that bronze welded and in service for who knows how long? To preserve the integrity of your trans unit, perhaps it would be better to fit a new drum to your gears rather than fit a brand new drum and gear unit.
Sorry for the confusion.
Allan from down under.
That is the first I have seen of a broken brake drum; usually it's the low, and sometimes reverse.
Were you using the transmission brake to excess? What kind of band lining material was it?
I have more broken brake drums than others. They crack in web area bad.
I just can't see it being expensive. Just buy decent used drums. Since you'll be using your own tail shaft and slow speed hub all you need is good drums. Plenty around. Perhaps Dave Huson has some. Check eBay for sure.
Your transmission wear report was excellent. I think procuring new drums and riveting them to your old gears is the best approach. You could get used drum assemblies from Bob's Antique Auto Parts Bob Bergstadt), Rockford, IL or Dave Huson in Colorado.
A used drum would be simpler and cheaper but once you start mixing parts you might end up with a noisy transmission.
Neil Tuckett a un très bon atelier de réparation de modèle de t en dehors de Londres. Il peut fournir une batterie de remplacement et d'installer les rivets pour vous. Le travail est simple si vous savez quoi faire. Sinon, il peut être un désastre.
Thanks for all your advice
Ricks : I bought the car non running from a notary, I don't know the preview owners it was an inheritance. But the lining was very bad.
Richard : there are no or very few parts for T here in France and transport and custom cost a lot from US.
I think I have to change the brake drum for a new also because the lugs inside are badly worn and I will take advice from Neil Tuckett
Are you certain the low speed drum is cracked? Since it doesn't go through, could it just be a scratch? You can do a little polishing/sanding in that area to see if the "crack" goes away.
You might polish out the appearance of a crack but not the crack. It looks like the beginning of a crack. I would recommend magnaflux or dye penetrant inspection.
try to contact Tuckett Brothers in the UK. Then it is within the EU and at least no customs and shipping might be cheaper too.
They MAY also be able to assist with new parts from the US. As they ship more items shipping per item may be less.
(They may even be on this forum)
Isn't that exactly what I said? Must be an echo......
C'est drôle !
Once when I couldn't find a replacement reverse drum on my 1913 I arc welded the web with a nickel rod. Then I buried it in a pile of sand to let it cool down slowly. It was fine for a few years afterwards until I sold the car.
I wouldn't do anything with a crack on the outer circumference of a drum except use it for a rivet setting madrel for bands.
BTW, Keith Townsend was in my car when that reverse drum broke during a visit up in Roseburg back in my Kevlar days. I seem to remember him asking "what was that sound?"
We make new transmission drums and gears so you don't have to go through the trouble of swapping gears.
Philipp we did weld the drums and they still ok at my 23 Touring just make sure to heat them up before welding. cheers stefan
Philippe, do not weld your drums. They WILL eventually break and could easily cause a lot of damage.
Philippe, Stephen is right. I had one exploded a few years ago and the parts damaged the hoghead and the oil pan. I had to replace the magneto coil ring and the magnets, some were broken and I didn't trust the others. Go to J and M Machine Co Inc and buy new drums.