downsizingnow48
Elite Member
This relief is on the backhoe valve stack. About half of it looks like it has been gnawed by a rat. You can see the pinhole in that area. The relief is in a place where debris never accumulates and has a light coating of oil because I spray the backhoe linkage periodically. Never seen a corroded part that looks quite like that. There are six of these reliefs on the valve stack, one other has a bit of this kind of corrosion and the other 4 are still perfect. So six valves in the same place and one corrodes to the point that it springs a leak. There is no corrosion on the valve body or linkage or hose fittings either.