Front / Rear Idler. Final Drive Reduction Assembly. Final Drive Motor Assy. Please confirm your sprocket hole count, gear count and inside diameter. There are two types of it. We need to know how many gears and holes of your old sprocket has. And we need its inside diameter. It is a durable undercarriage replacement part for your excavator. It was designed and manufactured to exact OEM specifications using a high-quality, high-strength steel. It will provide long-lasting and dependable performance even if you operate in the most extreme conditions. If you’re looking for top-quality undercarriage parts at the best possible prices, you’ve come to the right place. Cut out the middle man and deal direct with. DIEX-Undercarriage carries cutting-edge undercarriage parts that perfectly fit any machine model made by top brands in the industry. All these transport timeliness don’t apply to remote districts. So we could help you solve the problem well. Our goal has always been to grow a long lasting business, one customer at a time. We strive to bring you the best customer service with quality parts.