Gear Shift Lever Oil Leaks

[njrqs]

On my L1500 (Grey, similar to your L175's), the gearbox/hydraulic oil levels appear to be correct but when used and hot for some time, oil starts to seep out around the shift levers. I assume this means the oil is too high, but level appears OK when checked using the hole on the left side.

Any ideas what is causing this and/or what to do ?