James G Collinsville , CT September 02, 2017 Appliance: General Electric Dishwasher PDW9980L00SS Ge Dishwasher Pdw9980l00ss: Broken lower arm on dishwasher. How to replace Dishwasher Lower Spray Arm. I ordered the parts, including the spray arm, lock nut and filter. They wer either broken due to knife and for falling down! The new parts were an exact match! In addition the videos were very helpful! Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes