Ring

OEM Ring Split 4.47Mm Id X 7.21Mm Od X 1.32Mm Thk Backup Ring - Piston O-Ring #D71056 - OEM Leak Repair Part for Case Construction Equipment Service This OEM component is used in field and shop repairs involving oil leaks, dust intrusion, and failed sealing surfaces, with failed seals, housing leaks, and loss of fluid containment serving as a common service trigger. Often searched by buyers handling oil leak repair, o-ring replacement, and Case equipment gasket service service work.

Ships nationwide. In-stock parts ordered before 2:30 PM ET ship the same business day. Your exact shipping cost and delivery estimate are calculated at checkout from your ZIP code and the part’s size and weight; oversized and truck-freight items may need extra transit time and freight charges.

Free branch pickup is also available across Ohio, Indiana, Michigan, and Kentucky — just choose it at checkout.

30-day returns. New, unused parts in original packaging may be returned within 30 days. Some items — including electrical, special-order, and direct-from-supplier parts — are non-returnable. See our full return policy.