Yanmar 276D hydraulic leak.

[Dougryan]

Looking for some help.
I have a leak on the high pressure side of my pump. There is a flange with 4 bolts and an O ring on the pipe. The pipe goes back to the 3 point.

I’ve tried a couple different O Rings based on matching them up at the auto parts store. Not working.

Any ideas? Thanks

 

[rScotty]

It's probably a metric O ring. The old one - if it is original - is probably all smashed out of shape. Do you have a way to cross reference the original O ring, or find the orignal O ring dimensions?

BTW, What is that weird pink fluid coming out of the bottom of the second photo? Surely not any hydraulic fluid. It looks like what happens to hydraulic fluid when it is mixed with water and maybe some sort of dye.

rScotty