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Kubota G1900 Garden Tractor

The Kubota G1900 garden tractor was manufactured from 1989 to 2000. The Kubota G1900 is powered by Kubota D722 vertical thee-cylinder indirect injection liquid-cooled diesel engine with a rated power of 18.8 Hp (14 kW) at 3800 rpm.

The engine has a Bosch MD mini fuel injection pump and forced lubrication by trochoid pump. The tractor is equipped with a hydrostatic transmission with travel speed control. The maximum travel speed (forward and reverse): 8.1 mph (13 km/h) / 3.7 (6 km/h).

The garden tractor was equipped with a hydrostatic steering system with 2-wheel steer (G1900) or 4-wheel steer (G1900S), 16x6.50-8 front tires, and 23x8.50-12 rear tires. The wheelbase is 51" (1290 mm). The Kubota G1900 is compatible with the following attachments: a 48" mid-mount 3-blade mower deck with cutting height of 1.4-3.5" (35-80 mm), 54", 60" mid-mount 3-blade mower decks with cutting height of 1.5-4.0" (38-102 mm), and 48" front blade.

Engine
Engine Model Kubota D722
Engine Type Vertical, 4-stroke 3-cylinder diesel
Number of Cylinders Three
Displacement, cu in (L) 43.9 (0.719)
Engine Bore, in (mm) 2.64 (67.0)
Engine Stroke, in (mm) 2.68 (68.0)
Rated Engine Power, hp (kW) 18.8 (14.0)
Maximum Engine Power, hp (kW) 20.0 (14.9)
Rated Engine Speed, rpm 3800
Compression 23.5:1
Firing Order 1-2-3
Fuel System Indirect injection
Fuel Injection Pump Bosch MD type mini pump
Governor All speed mechanical governor
Direction of Rotation Counter-clockwise
Injection Nozzle Bosch Throttle type
Lubricating System Forced lubrication by trochoid pump
Injection pressure, MPa (psi) 13.73 (1991)
Fuel Tank Capacity, gal (L) 5.0 (18.9)
Engine Oil Capacity, qts (L) 3.4 (3.2)
Coolant Capacity, qts (L) 3.3 (3.1)

Electric System
Electrical System Rating, Volts 12
Starting System Electric Starting with Starter
Starting Motor 12V, 0.8 kW
Battery 12V, 36 AH equivalent
Charging Alternator 12V, 150W

Transmission
Transmission Type Hydrostatic
Gears Infinite forward and reverse
Differential Lock Standard
Travel Speed Control One pedal (Forward/Reverse)
Maximum Forward Speed, mph (kph) 8.1 (13.0)
Maximum Reverse Speed, mph (kph) 3.7 (6.0)
PTO Speed, rpm 2000
Service Brake Internal expanding shoe


Wheels and Tires
Drive Wheels 2WD 4x2
Steering Configuration Front Steer
Front Steering Wheels (G1900) 2-Wheel Steer
Front Steering Wheels (G1900S) 4-Wheel Steer
Steering System Hydrostatic
Front Tire Size (Turf) 16x6.50-8
Rear Tire Size (Turf) 23x8.50-12
Rear Tire Size (Turf) 23x10.50-12

Dimensions and Weight
Wheelbase, in (mm) 51 (1290)
Overall Length, in (mm) 73.4 (1860)
Overall Width, in (mm) 40.7 (1030)
Overall Height, in (mm) 45.7 (1160)
Weight (G1900), lbs (kg) 707 (320)
Weight (G1900S), lbs (kg) 749 (340)

48" Mower Deck
Mower Deck Model RC48
Mower Deck Type Mid-mount
Number of Blades 3
Drive Method Belt
Cutting Width, in (mm) 48 (1220)
Cutting Height, in (mm) 1.4-3.5 (35-80)

54" Mower Deck
Mower Deck Model RC54
Mower Deck Type Mid-mount
Number of Blades 3
Drive Method Belt
Cutting Width, in (mm) 54 (1370)
Cutting Height, in (mm) 1.5-4.0 (38-102)

60" Mower Deck
Mower Deck Model RC60
Mower Deck Type Mid-mount
Number of Blades 3
Drive Method Belt
Cutting Width, in (mm) 60 (1520)
Cutting Height, in (mm) 1.5-4.0 (38-102)

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