TC 35 Filter leak

[wf713]

I have a New Holland TC 35 with a front end loader, less than 250hrs on machine. Earlier this year while bush hogging it sprung a leak in the hydraulic oil cooler, repaired and resumed operation. Two months ago or so while hauling wood in the FEL i noticed a leak on the Hydrostat oil filter, turned out it was just the gasket, thought it was possible manufacturing error. Replaced that filter with a new one and things seemed fine, just the other day it happened again. I have properly tightened the filter making sure not to over tighten. Could this be a "over pressure" problem? Just wondered if anyone else has had this problem? Thanks, in advance for any help.