Thanks for the torque figuers and diagramme. Can I ask the source you obtained them from?
As I said in my previous post, in the past I have tightened them up with a 3 foot extension bar on a 1/2 inch drive knuckle bar and socket and they have never come loose. The question is, while I dont want the wheels to fall off, if I take the RV back to Tyreland and they torque them up to 190 Nm will I be able to get them off, at the roadside with my extension bar?
Without trying to teach anyone to suck eggs, the rear wheels are quite a deep dish, as a result a 12 inch extenstion is required. Exerting 190 Nm at a radius of 3 feet is not the problem. The problem lies in keeping the socket on the wheel nut whilst exerting that amount of force.