Kubota B5100
Power
12 hp
Production
1978-1984
Transmission
Unsynchronized gear
Weight
805 lbs [365 kg]
Drive
2WD/4WD
From the same series:
Introduction
Kubota B5100 Sub-Compact Utility Tractor
The Kubota B5100 is a sub-compact utility tractor manufactured in Japan between 1978 and 1984. Designed for versatility in small-scale agricultural and maintenance tasks, this model served as a foundational entry in the manufacturer's B-series lineup.
Engine and Performance
The tractor is powered by a 0.5-liter, liquid-cooled engine producing 12 horsepower (8.9 kW) at a rated speed of 3000 RPM. It features a glow plug pre-heating system to facilitate cold starts. The engine is designed for long-term reliability with an oil capacity of 2.3 liters and a recommended oil change interval of 75 hours.
Transmission and Drive System
The B5100 utilizes an unsynchronized gear transmission providing 6 forward and 2 reverse gears, operated via a dry disc clutch. The model was offered in both two-wheel drive and four-wheel drive configurations. Mechanical engagement of the rear differential lock and mechanical wet disc brakes provide necessary control and traction for varying terrain.
Hydraulics and PTO
Equipped with an open-center hydraulic system, the tractor delivers a pump flow rate of 3.17 gpm (12.0 lpm). The rear PTO operates at 540 and 1000 RPM, while an optional front PTO is available for specialized implements. The rear Category I hitch offers a lift capacity of 300 lbs (136 kg).
Dimensions and Handling
The tractor features a compact wheelbase of 46.5 inches (118 cm) and an overall width of 36.25 inches (92 cm), allowing for operation in confined spaces. The 2WD model weighs 805 lbs (365 kg), while the 4WD version weighs 893 lbs (405 kg). The operator station is of an open design, with a two-post fixed ROPS available as a configuration option.
Conclusion
The Kubota B5100 is a compact, mechanical-focused utility tractor suited for property maintenance, gardening, and light agricultural duties. Its balance of power, maneuverability, and multiple drive options makes it a functional tool for small-scale operators requiring a reliable, entry-level machine.
Production Information of Kubota, B5100
- Sub-Compact Utility tractor
- Built in Japan
| Manufacturer | Kubota |
|---|
Dimension and Tires Information of Kubota, B5100
| Rear tread | 25/29 inches [63/73 cm] |
|---|---|
| Wheelbase | 46.5 inches [118 cm] |
| 2WD Weight | 805 lbs [365 kg] |
| Height (steering wheel) | 44.1 inches [112 cm] |
| Length | 71.6 inches [181 cm] |
| 2WD Clearance (rear axle) | 10.25 inches [26 cm] |
| 4WD Weight | 893 lbs [405 kg] |
| Width | 36.25 inches [92 cm] |
| 4WD Front tread | 26.4 inches [67 cm] |
| 2WD Front tread | 26 inches [66 cm] |
| 4WD Clearance (front axle) | 8.625 inches [21 cm] |
| Ag front | 4.00-9 (2WD) |
|---|---|
| Lawn/turf rear | 27x8.50-15 |
| Lawn/turf front | 18x6.50-8 |
| Lawn/turf front(optional) | 4.50-10 (4WD) |
| Ag rear | 7.00-16 |
Engine Specifications of Kubota, B5100
- Liquid-cooled
| Starter power | 1.1 hp [0.8 kW] |
|---|---|
| Displacement | 31 ci [0.5 L] |
| Oil capacity | 2.4 qts [2.3 L] |
| Pre-heating | Glow plugs |
| Bore/Stroke | 2.625x2.75 inches [67 x 70 mm] |
| Oil change | 75 h |
| Coolant capacity | 3.2 qts [3.0 L] |
| Starter volts | 12 |
| Rated RPM | 3000 |
| Power | 12 hp [8.9 kW] |
Transmission Information of Kubota, B5100
Transmission variants 1
- Three gears, plus reverse, in two ranges.
| Type | Unsynchronized gear |
|---|---|
| Oil capacity | 9.0 qts [8.5 L] |
| Gears | 6 forward and 2 reverse |
| Clutch | Dry disc |
Mechanical Specs of Kubota, B5100
- Two- or four-wheel drive
- Open operator station. Two-post fixed ROPS available.
- Mechanical wet disc brakes
- Manual steering
| Differential lock | Mechanical rear |
|---|
Power Information of Kubota, B5100
| Rear PTO | Transmission |
|---|---|
| Rear PTO Type | 540/1000 |
| Front PTO Type | 3000 |
Hydraulics Specifications of Kubota, B5100
| Type | Open center |
|---|---|
| Pump flow | 3.17 gpm [12.0 lpm] |
Three-Point Hitch of Kubota, B5100
| Rear Type | I |
|---|---|
| Rear lift | 300 lbs [136 kg] |
Electrical System of Kubota, B5100
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Battery AH | 35 |
Where it sits
With 12 HP, the Kubota B5100 sits just below B5200 (13 HP) in Kubota's range. Its power puts it in the 1th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the Kubota B5100 have?
The Kubota B5100 delivers 12 HP.
What years was the Kubota B5100 produced?
The Kubota B5100 was produced in 1978-1984.
What transmission does the Kubota B5100 use?
The Kubota B5100 uses a Unsynchronized gear transmission.
How much does the Kubota B5100 weigh?
The Kubota B5100 weighs 805 lbs [365 kg].
Is the Kubota B5100 4WD?
The Kubota B5100 is available in 2WD/4WD.