There have been a kit for another pump, mounted to rh side of the gearbox. But it has same flow capacity, so you should fit a valve that joint those 2 flow to one 80l/min. Then you need cool gearbox oil too. And I havent seen any that kind of pump fitted in scandinavian tractors. I recommend fitting front mounted pump and external oil tank with filter, cooler and overpressure relief valve......