NH TN75 Hydraulic Problem

[RiversideFarm]

I’m having the same issue with my TN65. I hope yous is fixed but I just replaced the o-ring with a plastic spacer on mine and it took it about a week for the issue to happen again. Actually, I just made a post about mine and then found this one! Guess I should have looked harder before posting.

 

[mustangmarty1967]

Just putting in new o-ring in the elbow that feeds hydraulic fluid to the front hydraulic pump fixed it. However, I wasn’t too sure how long a round cross-section o-ring would last in a groove made for a square cross-section o/ring. So, I bought a few of these off eBay, and it seems to be working fine. Pulls hydraulic fluid like it should and holds prime fine as well.