Hi, I have filled the cylinders with duck oil and removed the rear buck and front nose, one of the rear brake drums is stuck on. I have a question regarding the steel pressure vessel mounted in the passanger side glove box position, whats is it for?. One pipe to it leads to the inlet manifold through a diaphram device, this steel container was found full of water when removed, I am guessing its some kind a vacuum resovoir perhaps for the brake system

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