I saw this topic somewhere else and found it very interesting.
Perhaps it makes sense to hear more from experts' voice in this forum.
"Let's open a thread of discussions on cylinders dieseling. A dieseled cylinder will not operate properly due to burnt holes through the piston seals, requiring...
Use variable displacement piston pump is good idea.
Changing the swash plate angle from positive to negative will change the pump mode to motor mode while the shaft rotation direction does not need to be reversed.