Introduction
Kubota STW40 Compact Utility Tractor
Produced between 2015 and 2025, the Kubota STW40 is a compact utility tractor designed for versatile agricultural, landscaping, and municipal applications. It features a robust 4WD chassis and is engineered for tasks requiring both maneuverability and consistent power output.
Engine and Performance
The tractor is powered by the Kubota D1803, a 1.8-liter, 3-cylinder liquid-cooled diesel engine. It delivers a gross rated power of 38.5 hp (28.7 kW) and a net rated power of 36.6 hp (27.3 kW) at 2700 RPM. The engine configuration provides stable torque for various utility operations.
Transmission and Drivetrain
The STW40 utilizes a hydrostatic transmission, offering infinite forward and reverse speeds across three distinct ranges. This configuration allows for precise speed control without manual shifting, which is advantageous for tasks such as mowing or loader work. It is equipped with standard four-wheel drive and power steering to ensure traction and operator control.
Hydraulics and PTO
The hydraulic system operates at a pressure of 2461 psi (169.7 bar) with a pump flow of 7.9 gpm (29.9 lpm). The tractor includes independent rear and mid-mounted PTOs. The rear PTO offers speeds of 540, 800, and 1000 RPM, providing compatibility with a wide array of implements.
Dimensions and Operator Environment
The STW40 has a wheelbase of 63.4 inches and an overall length of 115.8 inches. It is available in two configurations: a two-post folding ROPS model weighing 2436 lbs, and a cab version with optional air-conditioning weighing 2756 lbs. The Category I rear hitch features position control for accurate implement depth management.
Conclusion
The Kubota STW40 is a specialized compact utility tractor suited for operators who require a balance of high-end hydraulic performance and hydrostatic ease-of-use in a compact frame. Its design accommodates both professional agricultural use and demanding property maintenance tasks.
Production Information of Kubota, STW40
- Compact Utility tractor
| Manufacturer | Kubota |
|---|
Dimension and Tires Information of Kubota, STW40
| Cab Weight | 2756 lbs [1250 kg] |
|---|---|
| Wheelbase | 63.4 inches [161 cm] |
| Height (cab) | 85.2 inches [216 cm] |
| Height (ROPS) | 92.5 inches [234 cm] |
| Length | 115.8 inches [294 cm] |
| Ground clearance | 9.3 inches [23 cm] |
| ROPS Weight | 2436 lbs [1104 kg] |
| Width | 46.7 inches [118 cm] |
| Rear tread | 37.4 to 42.1 inches [94 to 106 cm] |
| Front tread | 40.2 inches [102 cm] |
Minimum width with R1 tires.
| Standard tires (ag) | Front: 6.00-12. Rear: 9.5-22 |
|---|---|
| Lawn/turf front | 24x8.50-14 |
| Lawn/turf rear | 13.6-16 |
Engine Specifications of Kubota, STW40
- Kubota D1803
- Liquid-cooled
- Diesel
- 3-cylinder
| Starter volts | 12 |
|---|---|
| Displacement | 111.4 ci [1.8 L] |
| Rated Power (gross) | 38.5 hp [28.7 kW] |
| Bore/Stroke | 3.4x4.0 inches [86 x 102 mm] |
| Starter | Electric |
| Rated RPM | 2700 |
| Rated Power (net) | 36.6 hp [27.3 kW] |
Transmission Information of Kubota, STW40
Transmission variants 1
| Type | Hydrostatic |
|---|---|
| Gears | Infinite forward and reverse (3-range) |
Mechanical Specs of Kubota, STW40
- Four-wheel drive
- Two-post folding ROPS. Cab optional with air-conditioning.
- Wet disc brakes
- Power steering
| Differential lock | Mechanical rear |
|---|
Power Information of Kubota, STW40
| Mid PTO Type | 2500 |
|---|---|
| Rear PTO | Independent |
| Rear PTO(optional) | 1000@2717 |
| Rear PTO(optional) | 800@2717 |
| Rear PTO Type | 540 (1.375) |
| Engine RPM | 2500@2734 |
| Mid PTO | Independent |
| Engine RPM | 540@2670 |
Hydraulics Specifications of Kubota, STW40
| Pressure | 2461 psi [169.7 bar] |
|---|---|
| Pump flow | 7.9 gpm [29.9 lpm] |
Three-Point Hitch of Kubota, STW40
| Rear Type | I |
|---|---|
| Control | Position control |
Electrical System of Kubota, STW40
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Charging system | Alternator |
| Cab Charging amps | 60 |
Where it sits
With 38 HP, the Kubota STW40 sits just above STW37 (36 HP) in Kubota's range. Its power puts it in the 21th percentile of 2010s models in our database (2476 machines).
Frequently asked questions
How much horsepower does the Kubota STW40 have?
The Kubota STW40 delivers 38 HP.
What years was the Kubota STW40 produced?
The Kubota STW40 was produced in 2015-2025.
What engine does the Kubota STW40 have?
The Kubota STW40 is powered by a Diesel, 3-cylinder engine.
What transmission does the Kubota STW40 use?
The Kubota STW40 uses a Hydrostatic transmission.
How much does the Kubota STW40 weigh?
The Kubota STW40 weighs 2756 lbs [1250 kg].
Is the Kubota STW40 4WD?
The Kubota STW40 is available in 4WD.