I"ve been losing hydraulic fluid and today I saw where it was coming from. The main line from the pump to the Hydraulic Block where it bolts in is leaking. I haven't tried to to tighten it up yet. I have the repair & parts manual. My question is can you do it without removing it to replace the two copper gaskets? Can't find the copper gasket number in the book. It looks to me like if you remove that plug theshims o-ring relief spring, poppet, and seat relief valve would fall out. Anyone familiar with this part, or repair. Yes I'm going to try and torque it down first. Fluid so darn costly in today's World you don't want to try too many times.