On my LB2204 when I have been running the tiller for more than a half hour or so I get hyd. fluid leaking out of the top of the trans. It is not a tremendous amount, but enough to make the pedals and steps slippery! I assume the fluid is expanding as it gets hot? Am I overfilling it or maybe a vent somewhere is blocked? Anyone else have this happen to them? My other tractor (a Kubota L295DT) does the same thing, so is this normal?