I had been providing advice to a man who owned a Lenar tractor with backhoe and FEL.
The Lenar was a limited production of a Chinese tractor that was later named Mahindra or Jinma.
After figuring out the tractor had a priority flow control to make certain the hydro-static power steering system had its needs met first, tests in the field confirmed a weak pump.
The owner bought a brand new pump for $75 and now the machine runs like new.
The company providing parts and manuals was Red River Parts and can be reached at parts@rraparts.com