Brevo clutch/gears

Hi Tom thanks for the reply. I have some manuals on it but have never done any oil change before and I am a little unsure of what oils to use, in the instructions it talks of filling drum b on the diagram with 4/5 parts heavy cylinder oil and 1/5 of well fluid engine oil, have you ever refilled this and what oil have you used? 
also under the instructions for the clutch it says to wash the plates every 2 or 3 weeks (which seems excessive) with paraffin and refilled with engine oil (no description) to just below the border of ring AA, I have no idea where this ring is. Any ideas? I’ve attached the instructions  

Philip:

I have a 104 in my barge. I might be able to provide some information (at least what i do)

Tom

Hi does anyone have an old Dutch Brevo clutch/reversegearbox on their boat? I need some advice on maintenance please