Title:
RING,WIPER (KU-RD40171350)
Description:
The Kubota RING, WIPER (KU-RD40171350) is a genuine hydraulic cylinder sealing component that helps protect the cylinder from external contamination while supporting reliable rod movement. The wiper ring sits within the cylinder head and works at the rod entry point to remove dirt, dust, moisture and other contaminants from the exposed cylinder rod before they can enter the hydraulic cylinder. This helps protect the internal sealing components and hydraulic fluid from contamination, supporting consistent cylinder performance and helping reduce premature wear. Kubota parts diagrams place RD401-71350 within the cylinder component assembly alongside the U-ring, back-up ring, O-rings and cylinder head. The part is used across several KX and U-series excavator applications.
Model Fitment:
- Kubota KX121-3 — serial numbers 20000–29999
- Kubota KX121-3S — serial numbers 30000–69999 / Super Series
- Kubota KX121-3ST — serial numbers 70000 and later / Super Series / Tier 4
- Kubota KX161-3 — serial numbers 20000–29999
- Kubota KX161-3S — serial numbers 30000–69999 / Super Series
- Kubota KX161-3ST — serial numbers 70000 and later / Super Series / Tier 4
- Kubota U45S — serial numbers 30000–69999 / Super Series
- Kubota U45ST — serial numbers 70000 and later / Super Series / Tier 4
- Kubota U48-5
Part Details:
- Genuine Kubota replacement part
- OEM part number: RD401-71350
- Alternate part number: RD40171350
- Part description: RING, WIPER
- Hydraulic cylinder sealing component
- Installed within the cylinder head assembly
- Helps wipe contaminants from the exposed cylinder rod
- Helps prevent dirt, dust and moisture entering the cylinder
- Helps protect internal hydraulic seals and components
- Supports clean and reliable cylinder operation
- Works alongside the cylinder’s U-ring, back-up ring and O-rings
- Used in boom, arm and swing cylinder assemblies depending on machine model
- Supplied as 1 wiper ring
- Confirm the machine model and serial number before ordering
