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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2006 Posts: 1,997 Big Bolt Forum Co-moderator | | Big Bolt Forum Co-moderator Joined: Sep 2006 Posts: 1,997 | I saw a post on the Big Bolt page someone was looking for switching out their front axle because the drums were shot and couldn't find replacement drums where they are. By the way? Are they available for the 1 1/2 and 2 ton AD trucks? But, anyhow, could old drums be spray welded and re-machined if they are past the allowable machining specs? Anyone ever heard of that? The post in the Big Bolt page was from South Africa.
A day without laughter is a day wasted- Charlie Chaplin
When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired. 1948 Chevy 2-Ton | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | I doubt if you can find new drums any more, but there are lots of old 1 1/2 -2 tons around with serviceable drums in North America. | | | | | Joined: Feb 2004 Posts: 29,795 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,795 | I doubt if the drum would survive the spray welding process without serious warping. It would also be very suceptible to the added material breaking loose under the stress of pressure from the brake shoes. I've seen spray-welded stroker crankshafts in flathead Fords with the built-up section loose and spinning on the crank journal. It makes for a really weird-sounding knock!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Nov 2005 Posts: 238 Shop Shark | | Shop Shark Joined: Nov 2005 Posts: 238 | There is a repair for badly worn brake drums I have seen on quite a lot of old cars over here.
The brake drum is machined out in a lathe, then the brake drum is heated and shrunk onto a steel band (basically a short section of large diameter seamless tube) and turned on a lathe again to ensure the correct internal diameter and concentricity.
You need to have this modification done on both drums on an axle because the friction generated of the brake linings is different against steel and cast iron. I spent a long time trying to cure a brake pull on an old Austin car before I spotted that a PO had only had one front drum repaired with a steel sleeve. | | | | | Joined: Sep 2006 Posts: 1,997 Big Bolt Forum Co-moderator | | Big Bolt Forum Co-moderator Joined: Sep 2006 Posts: 1,997 | Interesting. Wonder if it is only done in the UK. I'm going to google that. Thanks.
A day without laughter is a day wasted- Charlie Chaplin
When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired. 1948 Chevy 2-Ton | | |
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