L245DT Hydraulic oil leak issue

[KubotaFIN]

Hello,

My L245DT is leaking hydraulic oil from hydraulic block under seat.
Oil is leaking from this joint shown in the picture.

O-ring is good and i have tried other similar o-ring without success.

 

[Roadworthy]

Clean thoroughly and dry. Dust lightly with talcum powder to determine actual source of leak. Is it the sealed area or has the fitting itself cracked at the hydraulic line?