Question for John Deere 410D owners or former owners

I have an external oil leak on my JD 410 D backhoe. It looks like either the gasket, or the o-ring behind the oil cooler is leaking. I was wondering if anyone else has ever had this same leak on their machines. I am going to get the bolt specs for it like Delmer suggested and try tightening it up. If that does not stop the leak, then I will order a new gasket and o-ring and try that. I was just wondering if anyone else experienced this same leak and what the cause of the leak ended up being....

Question for John Deere 410D owners or former owners

Question for John Deere 410D owners or former owners