Kubota GL21 Tractor

Manufacturer Kubota
Price -
Model GL21
Equipment Type Compact Utility Tractors
Factory

KUBOTA GL21 POWER

Engine 20.7hp / 15.4kW

ENGINE DETAIL

The Kubota GL21 tractor features a compact D1403 diesel engine with a displacement of 1.4L, providing a balanced power output of 20.7 hp at 2600 RPM, ideal for small to medium-sized farming tasks. Its liquid-cooled system enhances thermal efficiency, though maintaining optimal coolant levels is critical to prevent overheating. The electric starter and 12-volt system ensure reliable starting, making it suitable for varied operational conditions, although this may limit cold weather performance without adequate battery care.

Description Kubota D1403 diesel 3-cylinder liquid-cooled
Displacement 85ci / 1.4L
Bore/Stroke 3.1x3.6inches / 79x 91mm
Power 20.7hp / 15.4kW
Rated RPM 2600
Starter electric
Starter volts 12

KUBOTA GL21 ENGINE

The Kubota GL21 features a 1.4L 3-cylinder diesel engine, providing a balance of efficiency and power suitable for small to medium agricultural tasks. Its 7.1-gallon (26.9L) fuel tank allows for extended operation without frequent refueling, making it advantageous for long workdays in the field. However, users should consider the tractor's weight and stability when operating on varied terrain, as its compact size may affect performance in rugged conditions.

Description Kubota 1.4L 3-cyl diesel
Fuel tank 7.1gal / 26.9L

TRANSMISSIONS OVERVIEW

The Kubota GL21 tractor features a 16-speed gear and a 16-speed power shift transmission, providing enhanced versatility for various tasks. The multiple gear ratios allow for optimal power management and speed control, particularly beneficial in varied agricultural applications such as tilling and hauling. However, the complexity of the power shift system may pose a learning curve for operators unfamiliar with advanced transmission technology.

Description 16-speed gear 16-speed power shift

TRANSMISSION 1

The Kubota GL21 features 16 gears (8 forward and 8 reverse) with a dual-range transmission that includes low and high ranges, supplemented by a creeper gear for enhanced low-speed control. This versatility is advantageous for tasks requiring precision, such as tilling and mowing, where slow speeds are critical. However, the complexity of multiple gears may challenge operators unfamiliar with gear selection, potentially impacting efficiency during operations.

Type gear
Gears 16 forward and reverse
Description Four gears (1-4) in low/high ranges plus a creeper/field range shift with shuttle

TRANSMISSION 2

The Kubota GL21 tractor's 16 forward and reverse gears, facilitated by an eight-speed power shift in two ranges, provides enhanced versatility for various agricultural tasks. The power shift feature allows for seamless gear transitions, improving operational efficiency and reducing the physical strain on the operator. However, the complexity of the transmission may require more maintenance and operator training to optimize its capabilities effectively.

Type power shift
Gears 16 forward and reverse
Description Eight power shift gears in two ranges with shuttle

MECHANICAL

The Kubota GL21 tractor features a 4x4 MFWD chassis, enhancing traction on varied terrains while providing stability during operations. Its power steering allows for easier maneuverability, particularly beneficial in tight spaces. The 16-speed gear and 16-speed power shift transmissions offer versatility in speed control, making it suitable for various farming tasks, though the open operator station may expose the operator to environmental factors.

Chassis 4x4 MFWD 4WD
Steering power
Brakes mechanical wet disc
Cab Open operator station
Transmissions 16-speed gear 16-speed power shift

TRACTOR HITCH

Rear Type I

POWER TAKE-OFF (PTO)

Rear RPM 568/803 / 985/1304 (1.375)

KUBOTA GL21 TIRES

The Kubota GL21 tractor's standard AG tires, with a front size of 6-14 and a rear size of 9.5-32, offer a balance of traction and stability suitable for various agricultural tasks. The larger rear tires provide improved weight distribution and enhanced grip in soft soil conditions, making it ideal for plowing and tilling. However, managing tire pressure is critical; over-inflation can lead to reduced contact area, negatively affecting traction and soil impact.

Standard tires (ag) Front: 6-14. Rear: 9.5-32

DIMENSIONS

Wheelbase 61inches / 154cm
Length 116.1inches / 294cm
Width 50.2inches / 127cm
Height 56.7inches / 144cm
Weight 2293lbs / 1040kg
Ground clearance 13.2inches / 33cm
Front tread 37.4inches / 94cm
Rear tread 39.8/44.5inches / 101/113cm

DIMENSIONS & TIRES

The Kubota GL21 tractor features a compact wheelbase of 61 inches (154 cm), ideal for maneuverability in tight spaces, making it suitable for small to medium-sized farms or properties. Weighing 2293 lbs (1040 kg) provides stability during operation, but may limit transport options without appropriate equipment. The front tire size of 6-14 combined with rear tires of 9.5-32 enhances traction and load-bearing capability, ensuring efficient performance on varied terrain.

Wheelbase 61inches / 154cm
Weight 2293lbs / 1040kg
Front tire 6-14
Rear tire 9.5-32

ELECTRICAL

Ground negative
Battery volts 12


Last Updated 2025-01-01
Stephen is a passionate tractor hobbyist with a deep-seated love for all things mechanized and agricultural. Growing up in a rural setting, he developed a fascination with these mighty machines that have played a crucial role in shaping the farming industry.

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