air is bad. there is a particulate filter at the fill location, and further particulate filters in the pump works. The reservoir actually has a one way valve on it similar to the diff, and will hold some pressure, but in general the reservoir is at 'air pressure', but that isn't the same as injecting or keeping air in the system.Even tho it is hydraulic, doesn’t AHC need air to do its thing? Isn’t there a air filter somewhere in the system? I could swear that i read someone here that fluid can get contaminated over time due to dirt getting into the system?
You might be thinking about the popular 2nd fuel tank products.