I changed out my front third function hydraulic couplers today on the FEL of my L3901, the original 1/2” ag style couplers have been leaking since I started using my grapple earlier this year. My dealer fitted 2 male ag couplers to the tractor when new, I fitted the 2 female ag couplers to the grapple. Not sure why I could not get them to not leak.
I have rear ag connectors on all of my tractors and have no issues.
I had 2 existing pairs of 1/2” flat face couplers that I had removed from other items so I fitted those using a male and female on the FEL and the other pair on the grapple, problem solved, no more leaking. All the leaking ag connectors went in the trash, I must top off the hydraulic fluid as I have been leaking for months.
just one of those jobs you keep meaning to do is finally done.
I have ag fittings on my MX5800 FEL, never had a leak, I’m thinking that maybe I purchased some slightly different female ag style couplers that were somehow not compatible with my FEL fittings on the L3901. Not going to dwell but may just swap my MX5800 FEL fittings out to flat face along with the heavy duty large grapple fittings, everything for my track loader and excavator already use flat face couplers. Will keep using ag fittings on the tractor rear remotes.