The E-47 pump functions are not logically intuitive. Depending on what function you are asking of it, it may activate one, or two of the solenoids simultaneously and probably run the pump motor at the same time. I have used this system for about 25 years and do not yet understand it. But the Meyers manual is well written with schematic drawings of both the hydraulics and the electrical. I think you can still download it from their website.
As to the right turn function, I have found that to be the one most commonly screwed up. This pump and solenoids are very particular about the oil used, and it has to be changed often (in my experience 2 X /winter season, if I expect it to be reliable). My Meyers book is out in the very cold barn right now, so my following answers may be a bit off. But if you haven't drained all the oil including what is in the turn cylinders, then that is step one. There are 2 very fine screens located under hex head plugs in the base. They need to be absolutely clean (mineral spirits is OK to clean with). The solenoid that controls the right turn (maybe "C"?) is often affected by some small particles of black stuff. This solenoid has a ring of very fine screen to keep the crap out of it (but some small particals do get into it). Last time I checked, this solenoid was over $70, so I did the MS cleaning to it, and that has saved it many times.
Most of the crap that gets into the Meyers oil gets in by embedding into the small rust pits of the turn cylinder rams, and then when you turn the blade, those salt, sand and ice or water particles get pushed back into the pump resevoir. Today's salt eats through the chrome plating on the turn rams in only 1 or 2 years of plowing. So this crap is always a problem.
The E-47 is a good unit, but it is fussy about having clean oil.
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