Whats normal top off/refill of hydraulic fluid (337B)?

[Jhogan0101]

yes. i did experience this when the nut on the elbow going into the rear hydro pump was loose and the threads wore out. it created a venturi situation and hydro fluid foamed out of the vent. took a while to find/understand what was happening.

anyway, this is different.

i have flown a couple times and it seems top off is minimal now. signs pointing to missing hydro fill screw causing the issue.