G'day all.

New member and novice ride-on mechanic.

I have a Rover Ranger (I believe it to be a 52155 XC?), shes a beast, but it cuts the grass. The problem I'm having is that the gearbox chain is slipping, yet I see no way of tensioning it. I've tried to remove a link, however this left the chain too short. I can't see that the gearbox can be moved, nor the idler(?) sprocket.

Has anyone got an experience with this model that could enlighten me on how this can be tightened?

Thanks