Ariens 52004000 – Replacement MPN: 52004000 Genuine OEM Ariens Gear Case – 52004000. Ariens 52004000 Gear Case Assembly 28 Sno-Tek 28 208cc Snow Blower. Ariens Part Number: 52004000 Compatible with the following Models: Ariens Sno-Tek 28E Ariens Sno-Tek 24E Ariens Sno-Tek 22E Ariens Sno-Tek 20R. We are proud to be a factory authorized retailer. We use several different carriers and choose the most economical for the item and destination based on the estimated transit time displayed. FixMyToys – A Division of Ball Equipment.