Kubota Excavator Parts

Kubota mini excavators and compact excavators, including the current 4 Series machines, the legacy 3 Series machines, and the U Series minimum tail swing models.

Use filters or search by OEM part number to find the right part. Compatibility details, including serial number ranges where applicable, are listed on each product page.

Parts Compatibility for Kubota Mini Excavators

Kubota organizes its compact excavator lineup into KX series conventional tail swing machines and U series minimum (or zero) tail swing machines, with model designations indicating the operating weight class. The KX040-4 sits in the 4 ton class, the KX057-4 in the 5 ton class, and the KX080-4 in the 8 ton class. The legacy KX121-3 and KX161-3 from the 3 Series are 4 ton and 5 ton machines respectively, and many parts cross over between a 3 Series KX and the 4 Series replacement of the same weight class because Kubota carried the same engine families and many cab and hydraulic components forward across generations. The U35 is a 3.5 ton minimum tail swing machine that uses the same V1505 engine and many of the same cab glass and filter parts as KX040-4 and KX033-4 conventional tail swing siblings.

Serial number range matters on this category. Several Kubota glass and hydraulic part numbers fit only specific S/N ranges of a given model. For example, our part RD45119180 (Shim) fits SSV75 / SSV75C / SSV75P / SSV75PC at S/N 50001+ only, and our part V0631-51880 (Fuel Filter) fits SSV75 family at S/N 20001-49999 and 50001+ but not the earlier S/N 10001-19999. The body of each product page lists the serial number constraint where one applies. The model code on the data plate inside the cab door post is the authoritative reference. Common Tier 4 / Stage IV upgrades on KX 4 Series machines used different fuel injection components than the older Tier 3 / Stage IIIA equivalents on the 3 Series, so verify your machine's emissions tier before ordering fuel system parts.

Common Replacement Parts for Kubota Mini Excavators

Cab glass is one of the most-ordered Kubota mini excavator replacement categories. Door, sash, and front lower glass cross references include RC411-46540 (Lower Door Glass), RC411-46530 (Upper Door Glass), RC411-46710 (Right Hand Sash Glass), RC411-46330 (Front Lower Glass), RC411-46112 (Front Upper Glass), RD451-46710 (Right Hand Sash Glass), RD451-46440 (Front Lower Glass), and V0621-34520 (Front Center Glass). RC411 series parts predominantly fit KX121-3 and KX161-3 family machines. RD451 series parts cover KX033-4, KX040-4, U35-4, U55-4 family machines. V0621-34520 is a high cross fitment SVL / KX cab glass.

Routine filtration is the bulk of the remaining inventory. Cab air filter T0270-67060 covers the KX040-4 / KX057-4 family. Engine oil filters W21ESO1600, 16271-32090, and 16271-32092 fit V1505 and V2003 powered KX excavators. Primary fuel filter cartridges RB101-51281, RB101-51282, and RD819-51280 cover most 3 Series and 4 Series machines, and the Tier 4 water separator HHV00-51920 fits later production KX040-4 and KX057-4 units. Hydraulic oil filter 6813162132 is a high fitment cross brand part used across multiple Kubota mini excavators, the SVL compact track loaders, and the SSV skid steer loaders, which is why it shows up on multiple equipment-type pages.