1.Cut Pork Loin, If Necessary, To Fit In The Slow Cooker. Season With Caraway Seeds, And Salt And Pepper To Taste. Pour Sauerkraut Over The Roast. 2.Cook On High For 1 Hour, Then Cook On Low For 5 To 6 Hours. Internal Temperature Of The Roast Should Be At Least 160 Degrees F (70 Degrees C).