How do i replace the sump in a samsung dishwasher?

This is not as bad as it looks, the Pump motor is more challenging. If your sump needs to be replaced then do the following. Unplug the unit, shut off the water, and remove the racks. Next remove the wash pipe that goes from the sump to up the back and over the top, it just pulls out but be gentle. Next remove all the screws on top of the screen and pull that out. You will see a gasket seal that is either stretched or broken. Next remove the white Pump wheel by turning the screw clockwise (the threads are reversed so it does not unscrew when the pump is running). Now pull up on the grey plastic wash pump housing. You will see the grinding blade that pulls off the wash pump motor shaft. There is your sump. If you need to change the pump you'll have to turn the unit over. Chances are all you'll need to do is really clean out the sump and replace the stretched out seals, available online for about 15.00 or so. Reassemble and start washing. good luck.