Sun Coast Cycle Sports carries used parts for the Kubota RTV900, a diesel-powered utility vehicle that set the standard for heavy-duty work UTVs when it debuted in 2004. Produced through 2013 before being succeeded by the RTV-X900, the RTV900 is powered by a Kubota D902 three-cylinder liquid-cooled diesel engine producing 21.6 hp at 3,200 rpm with 40.5 lb-ft of torque. It uses Kubota's variable hydrostatic transmission (VHT) with three ranges (low, medium, high) and selectable 4WD. Every used RTV900 component we stock is inspected, individually photographed with its own SKU, and ships from our Florida warehouse.
RTV900 platform and parts compatibility
The RTV900 used the Kubota D902 diesel engine throughout its production run with no major engine changes. However, Kubota made incremental improvements over the years including an updated shift assist mechanism, revised seat design, and a speedometer addition in later models. The RTV900 was offered in multiple configurations: Standard, Worksite, Recreation, Turf, Turf Utility, and Worksite Utility, all sharing the same engine and drivetrain. The primary differences between variants were tire type, accessories, and optional hydraulic utility valve on Utility models.
The RTV900's most notable design characteristic was its mid-mounted radiator, which Kubota relocated to the front on the successor RTV-X900. While the D902 engine is shared across both models, the chassis, cooling system layout, and suspension design differ between the RTV900 and RTV-X900. The RTV-X900 added independent rear suspension where the RTV900 used a solid rear axle. Bodywork, seats, and many accessory components do NOT interchange between the two platforms.
Common RTV900 failure points and replacement parts
Radiator overheating: The mid-mounted radiator position on the RTV900 is the model's most well-known weakness. The radiator draws in debris, dust, and chaff from the engine compartment rather than clean outside air. Regular cleaning is essential. Overheating can lead to head gasket failure and coolant burning.
Hydrostatic transmission shifting: The VHT transmission requires the engine to return fully to idle before shifting ranges. Operators who shift too quickly can damage the pressure release valve or strip shifting forks. Most shifting complaints trace to improper technique or a maladjusted/broken pressure release valve.
Drive belt wear: The hydrostatic drive belt wears under heavy loads and dusty conditions. Inspect belt tension regularly and replace before failure to avoid being stranded.
Dynamic braking harshness: Releasing the throttle at speed causes aggressive engine braking through the hydrostatic transmission, which can feel like applying the brakes suddenly. This is by design but catches new operators off guard.
Rear hub failure (recall): Certain RTV-X900 models had a recall for rear aluminum hubs to be replaced with steel. Some later RTV900 models may share this concern. Verify hub material on high-hour units.
Commonly replaced RTV900 parts
- Radiator and cooling system components
- Drive belt and hydrostatic transmission parts
- Seats, seat frames, and seatbelts
- Fuel injectors and fuel system components
- CV joints and axle assemblies
- Bed hydraulic cylinder and dump bed hardware
- Electrical harness, starter, and alternator
- Tires, wheels, and hub assemblies
Frequently asked questions
Q: Will RTV-X900 parts fit an RTV900
The D902 diesel engine is shared between both models, so many engine internals, filters, and fuel system components interchange. However, the chassis, cooling system layout, body panels, and suspension are different platforms. The RTV-X900 moved the radiator to the front and added independent rear suspension. Frame-mounted and body components generally do not cross over between the two models.
Q: What engine oil does the RTV900 use
The Kubota D902 diesel engine uses 15W-40 diesel engine oil. Oil capacity is approximately 3.5 quarts with filter change. The oil filter is a standard Kubota diesel filter shared across several Kubota engine platforms.
Q: Why does my RTV900 overheat
The most common cause is a clogged radiator. The mid-mounted radiator position pulls in debris from the engine bay. Clean the radiator fins regularly, especially in dusty or agricultural environments. Also check the drive belt tension, as a loose belt reduces coolant pump efficiency. Chronic overheating can indicate a failing head gasket.
Inspected by Powersports Technicians • Only One in Stock • Ships Fast from Florida
