Engine Accessory Drive Shaft Large Shaft Cast Iron Housing 180920 For Cummins. 180920 Engine Accessory Drive Shaft Large Shaft Cast Iron Housing. 1 × Engine Accessory. If you are missing any parts, or need replacements, we will gladly provide those items upon request. Any product you return must be in the same condition you received it. And in the original packaging. Please keep the receipt. Thanks for your feedback. We strive to satisfy every customer. We will do our best to solve your problem.