The pump is a gear pump, which means it's a positive displacement, which means it needs open center valves.
An open center valve means when the levers are in the neutral position, the "P" (pump) port is open to the "T" (tank) port. This allows the pump to free flow oil from the tank, through the pump, through the valves, back to tank. This will still generate some heat, but the pump will not be loaded all the time.
This is probably the right valve center. If it were wrong, you shouldn't even be able to start the engine, it would not be able to rev up, would probably stall the engine.
The 4 hoses on top of the valve...
If I'm seeing this correctly, the 2 on the right, in line with the right lever would go to the bucket cylinder (or cylinders). If one cylinder, one hose would go to one end of the cylinder, the other hose to the other end. If 2 cylinders, one hose would go to a T line that connects the 2 cylinders, the other hose would go to another T line to the other end of the cylinders. For now don't worry about which end goes where, just try to get it to move. If it's backward just switch ends with the hoses.
The hose on the left, in line with the left lever will go to a T line, that will connect to the cylinders that lift the loader arms. Since there is only one line, I'm assuming it is set up for single acting cylinders. That is they only have the ability to lift, gravity return. If so, the fitting on the other end of the cylinder (the rod end) will either be open or return to tank.
Back to the valve...
There will be 2 other ports. Look for markings like P, which is the pressure line from the pump. Look for a T, that will be the return to tank.
If the lines are not marked, or marked differently, maybe someone can positively identify the valve, I didn't find that number, but I didn't look extensively. Otherwise it may be necessary to take some lines loose and blow air through to determine what does what... That's the hard way, lets hope someone can identify it.
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