Horsepower

[Mullaney]

Thank you, anyone have any pics or videos doing this? Isn’t the bottom half or the inner chamber the one that has the big spring ( parking. Emergency brake spring) in it? I tried to research YouTube but everything comes up for other big trucks not sure if this is universal? Any advice is greatly appreciated. Thank you again

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Yessir. They are "big truck" brakes.
There are two diaphragms in there.
If you have a "key slot" on the back of the canister, you need to "cage" the spring.

I don't know if I can find a picture or not. I will look though.