Thought the hydraulic pump was leaking between the engine and the pump on the mounting surface. I took the pump off and cleaned the mounting surface and put a new gasket on. It still leaks. After further inspection, oil is actually leaking out a spring pin hole at the front end of the pump. The picture is a close-up of the front end of the pump where the hole is. Is this leak indicative of a problem other than the actual leak? What is going on here??