Simply lift up the old filter and cap and discard it. The new assembly simply pushes down and on to the agitator base. It stays in place by clicking over a raised perimeter rib on the base. This is the easiest repair (short of screwing in a light bulb) that one could do. The hardest part was to identify which parts I needed to purchase. The parts associate at Appliance Pros was terrific in tracking down what was needed.