Tractorpedia.com

Kubota B21

Kubota B21 tractor
View Images
The Kubota B21 is a backhoe loader tractor produced from 2001 to 2007. It features a Kubota E-TVCS 1.0L 3-cylinder liquid-cooled diesel engine delivering 21 hp gross and 19 hp net. The tractor uses a hydrostatic transmission with infinite forward and reverse speeds across 3 ranges. It has four-wheel drive, mechanical rear differential lock, power steering, wet disc brakes, and a four-post ROPS/FOPS for operator safety. The fuel capacity is 6.3 gallons, and the hydraulic system holds 7.3 gallons with an open center type. The rear PTO is live and runs at 540 rpm. Dimensions include a 60.4 inch wheelbase, 3988 lbs weight with loader, backhoe, and ROPS, and industrial tires sized 23x8.50-14 front and 12.4-16 rear. The backhoe attachment (Kubota BT751) offers a digging depth of 91.7 inches and a bucket width of 16 inches. The front loader (TL421) has a lift capacity of 926 lbs and a breakout force of 1543 lbs. Electrical system is 12 volts with negative ground.
Kubota B21backhoe loader tractorKubota E-TVCS enginehydrostatic transmissionTL421 loaderBT751 backhoetractor specs
Power-
Founded-
ModelB21

Technical Specifications

Detailed specifications and technical data for Kubota B21

Power

Engine (net):19 hp (14.2 kW)
PTO (claimed):13.5 hp (10.1 kW)
Engine (gross):21 hp (15.7 kW)

Engine

Type:diesel
Model:Kubota E-TVCS
Cooling:liquid-cooled
Cylinders:3-cylinder
Rated RPM:2600
Bore/Stroke:3.00x2.90 inches (76 x 74 mm)
Power (net):19 hp (14.2 kW)
Displacement:61 ci (1.0 L)
Oil capacity:3.2 qts (3.0 L)
Power (gross):21 hp (15.7 kW)
Starter volts:12
Coolant capacity:3.6 qts (3.4 L)

Capacity

Fuel:6.3 gal (23.8 L)
Hydraulic system:7.3 gal (27.6 L)

Electrical

Ground:negative
Battery volts:12

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)

Mechanical

Drive:Four-wheel drive
Brakes:Wet disc brakes
ROPS/FOPS:Four-post ROPS/FOPS
Power steering:Yes
Differential lock:mechanical rear

Production

Type:Backhoe loader tractor
Manufacturer:Kubota
Years produced:2001 - 2007

Attachments

Backhoe:Kubota BT751 Backhoe
Backhoe weight:892 lbs (404 kg)
Front-end loader:TL421 Loader
Backhoe swing arc:180°
TL421 Loader weight:650 lbs (294 kg)
Backhoe bucket force:3110 lbs (1410 kg)
Backhoe bucket width:16 inches (40 cm)
Backhoe digging depth:91.7 inches (232 cm)
TL421 Loader rollback:44°
Backhoe loading height:81.7 inches (207 cm)
TL421 Loader dump time:2.6s
Backhoe bucket rotation:180°
TL421 Loader dump angle:45°
TL421 Loader lower time:1.8s
TL421 Loader raise time:3.0s
Backhoe reach from pivot:121.3 inches (308 cm)
Backhoe transport height:79.3 inches (201 cm)
Backhoe dipperstick force:1748 lbs (792 kg)
TL421 Loader bucket width:56 inches (142 cm)
TL421 Loader rollback time:2.6s
TL421 Loader reach (dumped):20.5 inches (52 cm)
TL421 Loader reach (ground):58.3 inches (148 cm)
TL421 Loader height (at pin):88.8 inches (225 cm)
TL421 Loader breakout (at pin):1543 lbs (699 kg)
TL421 Loader clearance (dumped):66.5 inches (168 cm)
TL421 Loader lift (full at pin):926 lbs (420 kg)
Backhoe 2-Foot flat digging depth:90.5 inches (229 cm)
Backhoe 8-Foot flat digging depth:68.4 inches (173 cm)

Transmission

Type:hydrostatic
Gears:infinite forward and reverse (3-range)
Oil capacity:29.2 qts (27.6 L)

Tractor hitch

Control:position control
Rear Type:I
Rear lift (at 24"/610mm):1057 lbs (479 kg)

Backhoe & Loader

Dig depth:91.7 inches (232 cm)
Dump angle:45 inches (114 cm)

Dimensions & Tires

Weight:3988 lbs (1808 kg)
Rear tire:12.4-16
Wheelbase:60.4 inches (153 cm)
Front tire:23x8.50-14
Rear tread:41.3 inches (104 cm)
Front tread:37.8 inches (96 cm)
Height (backhoe):79.3 inches (201 cm)

Power Take-off (PTO)

Rear PTO:live
Rear PTO Type:540