Thanks so much for the replies; I had been struggling to find any reliable information between the different valve types. The "zero leak" commutator style is very interesting and may very well go that way. Every LSHT motor around the farm is a Char-Lynn; I expected that the different...
I am looking at converting my drill (soybean and wheat planter) to hydraulic drives to allow for variable rate and clutching; it is currently ground driven. 30' of drill will be divided into 4 - 7.5' sections, which will be automatically controlled.
System design as follows:
Monitor supplies...
