Those might be Bendix brakes. The wheel cylinder is on the top and the adjuster is on the bottom. Is there a single slot below the axle tube? Check the figure on this page.
[on edit] Nevermind. Dan has the right answer. wink

Last edited by klhansen; 08/27/2023 11:50 PM.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.