Kubota B21 Price, Reviews, Specs, Engine Oil Capacity, Weight, Serial Numbers, Attachments, History, Features & Pictures
The Kubota B21 Backhoe loader tractor is equipped with a Kubota E-TVCS diesel 3-cylinder liquid-cooled engine, which delivers 21 hp (15.7 kW) power at a rated rpm of 2600.
Kubota B21 Backhoe loader tractor featured a Kubota 1.0L 3-cyl diesel engine, 4×4 MFWD 4WD, hydrostatic power steering, wet disc brakes, 3988 lbs weight, and 3.2 Qts 3.0 L oil capacity.
The Kubota Backhoe loader tractor attachments include a front-end loader and backhoe.
Now, let’s find out the Kubota B21 Backhoe loader tractor Price, Parts Specs, Reviews, Serial numbers, and images.
Kubota B21 Price

Kubota B21 Original Price: $15,251 USD
Here are some examples of Kubota B21 prices from online listings:
- 2004 Kubota B21 with 3,000 hours: $14,450
- 2006 Kubota B21 with 4,000 hours: $13,000
- 2007 Kubota B21 with 5,000 hours: $7,500
- 2008 Kubota B21 with 6,000 hours: $10,000
- 2010 Kubota B21 with 7,000 hours: $15,000
Kubota B21 Specs
Here are the specifications of the Kubota B21 tractor:
Kubota B21 Engine
Engine | Kubota E-TVCS diesel 3-cylinder liquid-cooled |
Displacement | 61 ci 1.0 L |
Bore/Stroke | 3.00×2.90 inches 76 x 74 mm |
Power (gross) | 21 hp 15.7 kW |
Rated RPM | 2600 |
Starter volts | 12 |
Oil Capacity | 3.2 qts 3.0 L |
Coolant capacity | 3.6 qts 3.4 L |
Capacity
Fuel | 6.3 gal 23.8 L |
Hydraulic system | 7.3 gal 27.6 L |
Hitch
Rear Type | I |
Control | position control |
Rear lift (at 24″/610mm) | 1017 lbs 461 kg |
Power
Engine (gross) | 21 hp 15.7 kW |
Engine (net) | 19 hp 14.2 kW |
PTO (claimed) | 13.5 hp 10.1 kW |
Mechanical
Chassis | 4×4 MFWD 4WD |
Differential lock | mechanical rear |
Steering | hydrostatic power |
Brakes | wet disc |
Cab | Four-post ROPS/FOPS. |
Kubota B21 Transmission
Type | hydrostatic |
Gears | infinite forward and reverse (3-range) |
Oil Capacity | 29.2 qts 27.6 L |
Hydraulics
Type | open center |
Capacity | 7.3 gal 27.6 L |
Pump flow | 7.1 gpm 26.9 lpm |
Total flow | 8.5 GPM 32.2 lpm |
Steering flow | 1.3 GPM 4.9 lpm |
PTO
Rear PTO | live |
Rear RPM | 540 |
Kubota B21 Dimensions
Wheelbase | 60.4 inches 153 cm |
Weight | 3988 lbs* 1808 kg |
Front tread | 37.8 inches 96 cm |
Rear tread | 41.3 inches 104 cm |
Kubota B21 Tires
Industrial front | 23×8.50-14 |
Industrial rear | 12.4-16 |
Electrical
Ground | negative |
Battery volts | 12 |
Kubota B21 Attachments
Kubota BT751 Backhoe |
|
Height (to pin) | 88.8 inches 225 cm |
Dump angle | 45° |
Rollback angle | 40° |
Breakout force (at pin) | 1543 lbs 699 kg |
Lift to full height (at pin) | 926 lbs 420 kg |
Bucket width | 56 inches 142 cm |
Raise time to the height | 3 s |
Kubota BT751 Backhoe |
|
Backhoe type | Kubota Backhoe |
Bucket width | 16 inches 40 cm |
2-Foot flat digging depth | 91.7 inches 232 cm |
Reach from pivot | 121.3 inches 308 cm |
Swing Arc | 180 |
Bucket force | 3110 lbs 1410 kg |
Dipperstick force | 1748 lbs 792 kg |
Kubota B21 Problems
The Kubota B21 is a reliable tractor, but it is not immune to problems. Some of the most common problems reported with the B21 include:
- Hydrostatic transmission problems: The hydrostatic transmission on the B21 is a complex system, and it can be susceptible to problems: Common problems include leaks, low fluid levels, and faulty components.
- Engine problems: The B21 is powered by a 3-cylinder diesel engine. Common engine problems include overheating, low oil pressure, and faulty sensors.
- Electrical problems: The B21 has a number of electrical components, and these can be susceptible to problems. Common electrical problems include blown fuses, faulty wiring, and bad batteries.
- Hydraulic system problems: The B21 has a hydraulic system that is used to power the 3-point hitch and the PTO. Common hydraulic system problems include leaks, low fluid levels, and faulty components.
- Transmission problems: The B21 has a manual transmission. Common transmission problems include gear grinding, slipping, and faulty components.
Kubota B21 Review Video
Final Words

My name is Ranjitsinh Mantri founder of this blog and I am a full-time blogger writing is my passion. Just before 4 years ago We started this website in 2019 with my team to share our knowledge about tractor models and its prices guide on the internet.