The original builder skimped on the hydraulics. With the different dividers and splitters and a missing valve....One hose should go from the pump to the geared splitter and then the line/volume going to the loader valve should be split. Then 25% of the flow should got to the loader valve and 25% would go to the auxiliary port . The second line coming from the geared divider should be split so that 25% goes to steering and 25% goes to the travel valve for forward and reverse. I think the one splitter/divider is messed up. The other splitter/divider is not there so the valve for the bucket gets 50% of the flow. The travel & steering valve gets 50% of the flow as well because there is nothing to split the flow there either. All new splitter/dividers and the addition of the now missing fwd/reverse valve would probably fix it right up.