[mrlang]

I have an SDI25f M# P75400 = 8W. I connected the Ice and Water system to the household water supply, but no water is reaching the water dispenser or the ice maker.
To solve this, I ordered a new water tank and water valve because the hose (water tank) in the bottom of fridge was cracked.
My problem now is how do I replace the water tank? What parts in the inside of the refrigerator and freezer I need to disassemble in order to replace the complete system? The back of the refrigerator is sealed, so the access to the system has to be on the inside. I though I would just tie the hose to the end of the line and pull the new one in, but from the drawing I see on the manual, the hose that goes to the water dispenser, goes through a radiator first, so I need to have access to it in order to replace that part of the water tank, and I need to find the line that goes into the ice dispenser.
I called a technician, but he seems to think that the hose on the outside of the fridge is the one that goes into the ice dispenser, and I think that that hose on the outside is just a drain.
Can anyone help me out on this one? I can´t find any drawings of the water and ice systems on the internet, and because I live in Brazil, I don´t trust the refrigerator technician that services the area.

Thaks in advance for any input on the subject.