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I have a 1964 F350 with the park brake as pictured, it was relined and installed and seemed to work fine. I drove about 1/4 mile and I could smell it burning. Pulled over had a look and it was smoking slightly. Re-adjusted it, if it bites at all when on jacks and set when driving it is the same thing. If I adjust it so it does not rub it will not hold anything. I had the local mechanic check it out an no better. Is there something were missing, it seems simple enough but just won't work right. I'm afraid if I play with it much more I will destroy the brake lining if I haven't already. My father suggested maybe checking the drum and if required to rough it up some to give it a bit of bite. I remember it being smooth.
Ideas including a suitable replacement are welcomed. Thanks to @Conserv for such a good picture of the assembly.
I have been tinkering again with my park brake on my 64 F350 T98 transmission, I believe the culprit is a worn out spring part 2640 in the attached diagram. Any ideas where to find one, mine is in pieces. If not what is the proper length and I'm sure I an find something at the hardware store. I measured it and I estimate 1/2 x 2 1/2 inches.
Click on the link and then you can Show Phone Number on each of them and give a call. Dennis Carpenter NOS is a bit trickier to deal with but I've had good dealings with both.
just as a side note, you can't buy a spring by length and width and know it is correct. The important thing is the range and the tension, and I'm not sure you can find that info on most spring applications. So it's generally a trial and error if you can't find the OEM. As far as external band brakes go, both the drum and the shoe need to be clean and "true" for it to work properly. And all the linkage needs to be tight and lubricated. Usually if they don't work properly it is because of warn or mis-adjusted parts.
Eric
I worked on these extensively back in the 70’s. There are several ways to adjust this band. There should be a spring loaded adjusting screw on the middle of the band. Basically you use this to center the band on the drum. This allows you to really adjust the band closely. There are numerous adjustments on the linkage side of the brake. It’s all pretty simple.
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