Orient-Express
New member
I have a 1986 Bestway 50 with Hynautics controls at 3 stations. Was having trouble with no pressure in just the starboard shifter. For the life of me I couldn't figure out what the problem was, it seemed there was a blockage but it didn't make any sense where it could be until I ran into an obscure post on this forum by a PaulRainbow from 2016. I think it bears reposting for anyone who still has the Hynautics system. This saved me from having to replace a system ($$$$) that has become rather obsolete...at least for now.
"....Got this all sorted Saturday. The system has the MCV-04 charging valve fitted, this valve is shown in the fitting section of the manual, but is not mentioned in the section on bleeding the system. The manual just says to open the bleed screws. This will not work where the charging valve is fitted, no fluid is allowed from the reservoir to the slave cylinder. You have to turn the brass screw on the charging valve, that coincides with the circuit you are bleeding, half a turn or so to allow the fluid to flow, it then bleeds as it should."
As I said, this chance bit of information, one paragraph, saved me a ton of headache and expense. The post and the poster are no longer searchable it seems on YBW
"....Got this all sorted Saturday. The system has the MCV-04 charging valve fitted, this valve is shown in the fitting section of the manual, but is not mentioned in the section on bleeding the system. The manual just says to open the bleed screws. This will not work where the charging valve is fitted, no fluid is allowed from the reservoir to the slave cylinder. You have to turn the brass screw on the charging valve, that coincides with the circuit you are bleeding, half a turn or so to allow the fluid to flow, it then bleeds as it should."
As I said, this chance bit of information, one paragraph, saved me a ton of headache and expense. The post and the poster are no longer searchable it seems on YBW
