I had the hydraulic tube inspected by local hydraulic experts ( they service all mining equipment here in Sudbury) and they said it was a flaw in the metal that caused the pin holes. They suggested that I go after John Deere to get this part replaced at no charge. I am over the 2 yr warranty...
I encountered a major leak underneath my seat. Upon further investigation, the main high pressure line from the pump to the top of the hydrostatic differential. Oil would spray out when I was using down pressure on the loader. I removed the tube ( 4 hrs what a job! ) to find two small pin size...