I`ll appriciate if any has experience with lifting capacity as I find it inadequate. Mine has to struggle with a 2 bottom plough, although it`s heavy built and with approx. 35 kilos of extra weight. - Hydraulic filter is new and it has 24 liters of singlegraded SAE 40 oil in the sump as instructed (manual). Multigrade oil with additives is NOT recommended for this generation of the scotch yoke pump, gaskets and seals. I know that some has added an extern hydraulic cylinder on the left lift arm. Anyone with experience of this possibility ?