The Kubota B2231 is a compact utility tractor model from the B2 series, manufactured from 2018 by Kubota. It was available in four-wheel drive (4WD) version.
The Kubota B2231 is equipped with a 1.1 L (68.5 cu·in) three-cylinder diesel engine with 78.0 mm (3.07 in) of the cylinder bore and 78.4 mm (3.09 in) of the piston stroke, and one of two transmissions: a gear type transmission with 9 forward and 9 reverse gears or a hydrostatic transmission with infinite (3-range) forward and reverse gears.
The Kubota B2231 compact utility tractor features:
- The Kubota D1105 diesel engine which produces 23 PS (16.9 kW; 22.7 HP) at 2,500 rpm of horsepower.
- Power steering
- Multi plate wet disc brakes
- Open operator station with two-post ROPS or Cab (option)
- Category I rear hitch with 970 kg (2,140 lbs) of maximum lift capacity
- Optional middle PTO with 2,500 rpm
- Independent rear PTO with 540 rpm
General specifications
| General Specifications |
| Model |
Kubota B2231 |
| Tractor type |
Compact utility tractor |
| Production years |
2018- |
| Factory |
– |
| Dimensions and weight |
| Length |
2,730 mm (107.5 in)
|
| Width |
1,234 mm (48.6 in)
|
| Height |
2,327 mm (91.6 in)
|
| Wheel base |
1,500 mm (59.1 in)
|
| Ground clearance |
265 mm (10.4 in)
|
| Weight |
755 kg (1,664 lbs)
|
| Fuel capacity |
| Fuel tank capacity |
27.0 liters (7.1 US gal.; 5.9 Imp. gal) |
Engine
| Engine Specifications |
| Engine model |
Kubota D1105 |
| Engine type |
4-stroke, SOHC, three-cylinders |
| Displacement |
1.1 L, 1,123 cm3, (68.5 cu·in) |
| Bore and stroke |
78.0 mm X 78.4 mm (3.07 in X 3.09 in) |
| Max. horsepower |
23 PS (16.9 kW; 22.7 HP) at 2,500 rpm |
| Cooling system |
Liquid-cooled |
| Fuel used |
Diesel fuel |
| Starting system |
Electric starting with 12V starter |
| Starting support device |
Glow plug in combustion chamber |
| Governor |
All speed mechanical governor |
| Charging system |
Alternator 12V |
| PTO shaft rotation |
Counterclockwise |
| Valve clearance |
| Intake valve clearance: |
0.145-0.185 mm (0.0057-0.0073 in) |
| Exhaust valve clearance: |
0.145-0.185 mm (0.0057-0.0073 in) |
| Oil system |
| Lubrication system: |
Forced lubrication by trochoid pump |
| Oil type: |
CF or higher |
| Recommended oil: |
SAE 10W-30, 10W-40 |
| Oil pressure: |
At idle speed: 49 MPa (0.5 kgf/cm2, 7 psi)
At rated speed: 196 to 441 MPa (2.0-4.5 kgf/cm2, 28 to 64 psi)
|
| Oil filter: |
Full flow paper filter (Cartridge type) |
| Oil pressure indicating: |
Electrical type switch |
| Oil and oil filter change interval: |
Every 200 hours |
| Fuel system |
| Fuel injection pump: |
Bosch MD type mini fuel injection pump |
| Injection nozzle: |
Mini Nozzle (DNOPD) |
| Firing order: |
1-2-3 |
| Injection pressure: |
13.73 MPa (140 kgf/cm2, 1,991 psi) |
Transmission and chassis
| Chassis, steering and brakes |
| Chassis |
4×4 MFWD 4WD |
| Steering type |
Power |
| Brakes |
Multi plate wet disc |
| Transmission |
| Transmission manufacturer or model |
– |
| Transmission type |
Gear type |
| Gears |
9 forward and 9 reverse |
| Speed |
Forward: 20.1 kmh (12.5 mph)
Reverse: 18.4 kmh (11.4 mph)
|
| Transmission № 2 |
| Transmission manufacturer or model |
– |
| Transmission type |
Hydrostatic |
| Gears |
Infinite (3-range) forward and reverse |
| Speed |
Forward: 21.7 kmh (13.5 mph)
Reverse: 17.3 kmh (10.8 mph)
|
Tires
| Tires |
| Front tires |
Ag: 6-12 |
| Rear tires |
Ag: 9.5-16 |
Rear Hitch
| Three-Point Hitch |
| Category |
I |
| Control type |
Position control |
| Lift capacity (at ends) |
970 kg (2,140 lbs) |
PTO (Power take-off shaft)
| PTO |
| Middle PTO type |
Optional |
| Middle PTO speed |
2,500 rpm |
| Rear PTO type |
Independent |
| Rear PTO speed |
540 rpm |
Electrical system
| Electrical system |
| Ground |
Negative |
| Charging system |
Alternator |
| Charging amps |
– |
| Battery |
12V |
Hydraulic system
| Hydraulic system |
| Hydraulic type |
Open center |
| Pump flow |
8.7 gpm (32.9 lpm) |
Attachments
| Kubota 54″ mid-mount mower deck with 3-blade |
| Cutting width |
1,370 mm (54 in) |
| Weight |
148 kg (328 lb) |
| Cut height |
30-100 mm (1.5 to 4 in) |
| Kubota 60″ mid-mount mower deck with 3-blade |
| Cutting width |
1,520 mm (60 in) |
| Weight |
160 kg (353 lb) |
| Cut height |
30-100 mm (1.5 to 4 in) |
| Kubota LA424EC Loader |
| Height (to pin): |
1,910 mm (75.4 in) |
| Clearance, dumped bucket: |
1,440 mm (56.9 in) |
| Dump angle: |
44° |
| Rollback angle: |
25° |
| Lift to full height (at pin): |
420 kg (926 lbs) |
The Kubota B2231 is a compact utility tractor model from the B2 series, manufactured from 2018 by Kubota. It was available in four-wheel drive (4WD) version.
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