MF 390T not going into 4WD

[Tommy]

Next doors tractor won't engage 4wd. Am I right in thinking that it needs 12v to fetch it out as I can't get it to show any at the solenoid but I would have thought it should be stuck in if that was the problem??? What can I be missing before I go any further?
Cheers
Tommy

 

[raiderz]

Tractor should be in 4wd when the handbrake, footbrake or 4wd is on. If there are any electrical problems to the solenoid it will be in 4wd anyway as you are correct in saying it needs 12v to dis-engage 4wd.

 

[Farmer mk1]

Our 390T is a lever next to the seat, all mechanical. No switch. Yeah your right with the tractors 4wd electrics, they don't need power to be in 4wd but the solenoid needs energising to take them out of 4wd. If there is no power then it is in 4wd. If it's not I dare say you have mechanical failure some where. Get someone with the ignition on to do the switch which you have an volt meter under neath in the solenoid wires, see if there is change.