This is on a zx75 excavator but uses the same oil cooled deutz motor. I figured I could get more response on this forum. It leaks fuel around where the injector lines hook to whats the injection pump. Never air locks just seeps a small amount of fuel when running. Some are a little worse than others and one doesn't leak.
U can take the line off and use some emery cloth on the ends of the lines.. Get a can of brake cleaner w a straw and shoot it in the line to clear out any debris that may have gotten in the line.. Good luck
Are you thinking that the leaks are where the end of the injection line seats in the pump? I just phrased it that way,I'm not sure where the fuel is leaking from. It's on top of what I call the injection pump. These motors have individual pumps on the side of the motor.