I added an extra relief valve to the hydraulic circuit of the FEL, on my Jinma. I added a similar arrangement to return the oil back to the tank using pipe fittings. Works good.
well, If I hadn't already made my return to tank. I would have ordered 1 of these... I looked for 1 after talking to dave @ Dave's tractors in red bluff cal..He's the one that yanmars came from the factory loader had these as a return