I have owned and suffered$$$$$$$$ because of the dual pump JD hydraulic system.What is the purpose of this system? Can a real hydraulic pump like everyone else uses be mounted up front and do away with the JD components? What differences are there in JD the front pumps ? My 510b TLB needs a front pump now,the casting is ruined, and a NEW pump is more than I paid for the machine last year. Need some informed advice plese.