[Stefan]

Hello Verner?

I will try to explain or to give you an idea of the work you´re going to do.

At first you have to check for the stick which you switch from the offroad gears to your road gears. In the picture i send its the stick in front of the main gearstick with only two positions. I hope you have it because the 700 does also run only 25km/h in the offroad gear.



But your also right if it runs in the second road gear (6) 25km/h. In the third it goes around 40km/h.
The third and fourth is locked in the head of the gearbox (in the cover of it)
You can unlock it but its a little work to do this.
You have to rebuild your cabine to work on the cover of the gearbox.

I´m not the gearbox crack but these are the first few steps you can check. Further explanations are very difficult to explain in english.
I think it will help you if you buy this: http://www.buchundbild.de/de/Werkstatt-H...-400-21-23
Normally they have it also in english. But i don´t know how detailed the explanation of unlocking the gearbox in this books are.

kind regards
Stefan