Hi new to the forum ... just got myself a 2017 T6.180 EC 50k full suspension, almost 7000hrs. UK Import, very clean but it has a very annoying issue with the steering. at low revs and at idle the steering has a very noticeable vibration and groaning noise. It seems to dissipate at high revs and when traveling at speed on the road but then comes back when slowing up at junctions, and makes a dreadful groan as the revs come back. Always there in backround as well when operating around the yard at low revs. Neighbour mentioned it might be orbital unit and a bit of googling suggests it could be something as simple as a filter? any thoughts? Thanks D