Sorry, but a bunch of closeup pictures is not going to show anyone what they need to know.
What we need to know is the circulation path for the oil.
Start at the pump, go from the IN port and follow the hose. It should connect to a port mounted low on the hydraulic reservoir.
Go back to the pump and follow the hose from the OUT port. It should connect to the IN port on the hydraulic valves.
Move to the OUT port on the valves and follow the hose from there. It should lead back to the hydraulic reservoir.
As a test to see if the pump is doing anything, disconnect the hose from the IN port on the valves, and put it in a bucket. Start the tractor up and turn the pump over. It should pump oil.
Reconnect the hose to the IN port on the valves, and disconnect the hose that runs from the OUT port to the reservoir, from the reservoir, and put it in the bucket. Start the tractor and turn the pump over. It should pump oil.
One of these two tests will determine what is going on. Either the system is not plumbed correctly, or the valve is blocking the flow.
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