Same brandUtility tractorsSpec sheet
Kubota GL21
The Kubota GL21 is a compact utility tractor that was made from 1990 to 1992. It's a 4-wheel drive tractor with power steering, which makes it easy to handle. The tractor has a gear and power shift transmission with 16 forward and 16 reverse gears, giving the driver lots of options for different tasks. Under the hood, the GL21 has a Kubota D1403 engine. This engine is liquid-cooled and runs on diesel fuel. It has 3 cylinders and puts out 20.7 horsepower, which is on the lower end for tractor power. The engine size is also smaller than average, but it runs at a very high speed of 2600 rpm. The tractor weighs 2293 pounds, which is lighter than many other tractors. It's 116.1 inches long, 50.2 inches wide, and 56.7 inches tall. The GL21 uses standard agricultural tires, with smaller ones in front and bigger ones in back.
ManufacturerKubotaPower20.7 hp(15.4 kW)ClassUnder 25 HP tractors →Engine3-cylinderTransmissionGear and Power Shift
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Key specifications
- Category
- Utility
- Engine power
- 21hp
- Operating weight
- 2,293 lb
- Transmission
- Gear and Power Shift
Category comparison
GL21 compared with its category
vs. Utility medianDistribution
Engine Power (hp)
All recorded Utility tractors
20.7 hp · 9th
This model
9
Median 55 hp
177
This modelUtility tractorsMediann = 5,383
The GL21 ranks at the 9th percentile for engine power among recorded utility tractors.
Overview
About the Kubota GL21
The Kubota GL21 is a compact utility tractor that was made from 1990 to 1992. It's a 4-wheel drive tractor with power steering, which makes it easy to handle. The tractor has a gear and power shift transmission with 16 forward and 16 reverse gears, giving the driver lots of options for different tasks. Under the hood, the GL21 has a Kubota D1403 engine. This engine is liquid-cooled and runs on diesel fuel. It has 3 cylinders and puts out 20.7 horsepower, which is on the lower end for tractor power. The engine size is also smaller than average, but it runs at a very high speed of 2600 rpm. The tractor weighs 2293 pounds, which is lighter than many other tractors. It's 116.1 inches long, 50.2 inches wide, and 56.7 inches tall. The GL21 uses standard agricultural tires, with smaller ones in front and bigger ones in back.
Full specifications
Recorded specifications
General
| Manufacturer | Kubota |
|---|---|
| Model | GL21 |
| Category | Utility tractor |
| Type | 4x4 MFWD 4WD |
| Years built | 1990–1992 |
| Operating weight | 2,293lb(1,040 kg) |
Engine
| Make | Kubota |
|---|---|
| Model | D1403 |
| Power | 20.7hp(15.44 kW) |
| Cylinders | 3 |
| Displacement | 85ci(1.39 L) |
| Bore | 3.1in(78.74 mm) |
| Stroke | 3.6in(91.44 mm) |
Transmission
| Type | Gear and Power Shift |
|---|---|
| Forward gears | 16 |
| Reverse gears | 16 |
Chassis & drive
| Chassis | 4x4 MFWD 4WD |
|---|---|
| Drive | 4WD |
| Steering | Power |
Dimensions
| Length | 116.1in(2,949 mm) |
|---|---|
| Width | 50.2in(1,275 mm) |
| Height | 56.7in(1,440 mm) |
| Operating weight | 2,293lb(1,040 kg) |
Tires
| Front | 14-Jun |
|---|---|
| Rear | 9.5-32Convert |
Closest alternatives
GL21 compared with the nearest models by horsepower
The closest utility models to the Kubota GL21 by rated horsepower are the Kubota FT21 and the Kubota KB21X. The Kubota FT21 matches it on rated power and weighs 300 lb less, so it is lighter for its power, which favors PTO and transport work over heavy draft. It entered production in 2012, 22 years after the GL21. The Kubota KB21X matches it on rated power and weighs 680 lb less, carrying 78 lb per horsepower against 111 lb. It entered production in 2009, 19 years after the GL21. Of the 3 models, the GL21 has the highest weight per horsepower at 111 lb per hp.
| Spec | Kubota GL21 | Kubota FT21 | Kubota KB21X |
|---|---|---|---|
| Engine power | 20.7 hp15.4 kW | 20.7 hp15.4 kW | 20.7 hp15.4 kW |
| Operating weight | 2,293 lb1,040 kg | 1,995 lb905 kg | 1,609 lb730 kg |
| Weight per hp | 111 lb/hp67 kg/kW | 96 lb/hp59 kg/kW | 78 lb/hp47 kg/kW |
| Displacement | 85 ci1.39 L | 91.5 ci1.5 L | 68.5 ci1.12 L |
| Cylinders | 3 | 3 | 3 |
| Transmission | Gear and Power Shift | Power shift | Power shift |
| Drive | 4WD | 4WD | 4WD |
| Years built | 1990-1992 | 2012-2015 | 2009-2014 |
Calculators
Calculators for the GL21
PTO power
About 17 to 19 PTO hp
Estimated from the 20.7 hp engine rating. The calculator also estimates drawbar power by surface.
Implement sizing
Implements a 20.7 hp tractor can run
The calculator sizes mowers, tillers, discs, plows and balers for this tractor.
Ballast
129 lb per PTO hp as listed
The calculator gives the target weight and front/rear split for each job.
Units
20.7 hp is 15.4 kW
The converter gives kW and metric PS values, as used on European spec sheets.
Tires
Convert the 9.5-32 tire size
The calculator gives diameter, rolling circumference and the metric or inch equivalent.
Category medians
GL21 vs. Utility median
Kubota GL21 compared with other Utility tractors
| Spec | This model | Utility median | Difference | Percentile |
|---|---|---|---|---|
| Engine Power | 20.7 hp | 55 hp | -62% | 9th |
| Engine Displacement | 85 ci | 183 ci | -54% | 14th |
| Cylinders | 3 | 4 | -25% | 23rd |
| Forward Gears | 16 | 12 | +33% | 73rd |
| Operating Weight | 2,293 lb | 5,303 lb | -57% | 14th |
| Length | 116 in | 137 in | -15% | 22nd |
| Width | 50.2 in | 66 in | -24% | 18th |
| Height | 56.7 in | 94.1 in | -40% | 7th |
Medians and percentiles are calculated from the utility tractors in the database that have a recorded value for each specification (sample size 3,933–5,720 models).
Same manufacturer
Other Kubota models
Other manufacturers
Models with similar horsepower
FAQ
Frequently asked questions
When was the Kubota GL21 in production?
Kubota GL21 production started in 1990 and ended in 1992.
What size tires does the Kubota GL21 use?
The Kubota GL21 is fitted with 14-Jun front tires and 9.5-32 rear tires from the factory.
What hitch category is the Kubota GL21?
The Kubota GL21 uses a Category Category 3 hitch.
How much horsepower does the Kubota GL21 have?
The Kubota GL21 produces 20.7 hp from its 3-cylinder engine. Engine displacement is 85 ci.
How much does the Kubota GL21 weigh?
The Kubota GL21 weighs about 2,293 lb in operating condition.
What transmission is in the Kubota GL21?
Transmission on the Kubota GL21 is Gear and Power Shift, with 16 forward speeds.
What maintenance does the Kubota GL21 require?
The Kubota GL21 needs periodic engine oil and filter changes, hydraulic fluid checks, and regular greasing and inspection. The owner's manual lists the manufacturer's recommended service intervals.