Sorry for high-jacking post, but I am always seeing this and trying to understand logic behind it. How is shot globes have to do anything with graduations?*Oh, also should note, since you had 11 gradations, I think it's unlikely a dead globe. How old are the rear globes?
My logic is:
1. Shot globe means leak at diaphragm. Means diaphragm does not work and globe get's filled with fluid.
2. Graduations show how much fluid is used within system to get from L to H. Let fluid (less graduations) just means that truck is not going as high as needed.
I understand I am wrong, but how?