Kubota KX040-4 Undercarriage Parts
Undercarriage parts available for the Kubota KX040-4: track roller (OEM RD118-21700), carrier roller (OEM RD461-21900), sprocket (OEM RD118-14433).
Parts on this page also fit the Kubota KX121-3, KX121-3S, KX121-3ST — see each part's fitment list for the exact models.
Parts list with OEM numbers
| Part | OEM part number | Fits | Details |
|---|---|---|---|
| Track Roller (bottom roller) | RD118-21700, RD148-21700 | KX040-4, KX121-3, KX121-3S, KX121-3ST | Specs & quote |
| Carrier Roller (top roller) | RD461-21900 | KX057-4, KX057-5, KX040-4, KX040-5, KX121-3, KX161-3 | Specs & quote |
| Sprocket (drive sprocket) | RD118-14433, RD118-14430, RD148-14430 | KX040-4, KX121-3, KX121-3S, KX121-3ST | Specs & quote |
Part numbers can change with machine serial ranges. Send your serial number and we will confirm before quoting.
Ordering
Send the parts you need from this list — track roller, carrier roller, sprocket — and we quote them together. Each part comes from a partner factory that specializes in it, and the order is consolidated into one shipment from Xiamen.
| MOQ | 1 set per machine |
|---|---|
| Lead time | 7–25 days, depending on part type and quantity |
| Warranty | 12 months |
| Payment | T/T, L/C |
| Shipping port | Xiamen |