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Kubota B7100HST Tractor

The Kubota B7100HST is a 2WD or 4WD compact utility tractor. This model was manufactured between 1977 and 1997. The tractor was designed in 2 versions: B7100HST-E (2WD) and B7100HST-D (4WD).

The Kubota B7100HST powertrain system components: a 46.5 cu.in (0.8L) Kubota D750 4-cycle vertical 3-cylinder indirect injection naturally aspirated water-cooled diesel engine with a maximum power of 16 hp (11.9 kW), and two-range hydrostatic transmission with infinite forward and reverse gears.

Max forward speed: 3.5 mph (5.7 km/h) using low range or 9.1 mph (14.5 km/h) using high range, and max reverse speed: 2.4 mph (3.9 km/h) using low range or 6.2 mph (10.1 km/h) using high range. The open center hydraulic system used a gear pump with fluid flow rate of 3 gal/min (11.4 l/min). The hydraulic pressure is 117 bar (1700 psi).

The two-wheel drive models are equipped with 4.00x9 front tires and 7.00x16 rear tires. The 6.00x12 (AG) or 20.5x8.00-10 (Turf) front tires and 8.00x16 (AG) or 29x12.00-15 (Turf) rear tires are used for tractors with four-wheel drive. The wheelbase is 54.6" (1390 mm) for 2WD models and 55.1" (1400 mm) for 4WD models. The Kubota B7100HST is compatible with a Kubota B1630C front-end loader with lift capacity to full height of 510 lbs (230 kg) and breakout force of 780 lbs (353 kg).

Engine Model Kubota D750
Engine Type 4-cycle vertical 3-cylinder water-cooled diesel
Number of Cylinders 3
Displacement, cu.in (L) 46.5 (0.8)
Engine Bore, in (mm) 2.68 (68.0)
Engine Stroke, in (mm) 2.76 (70.0)
Aspiration Naturally aspirated
Maximum Engine Power, hp (kW) 16.0 (11.9)
Rated Engine Power, hp (kW) 13.0 (9.7)
Rated Engine Speed, rpm 2800
Maximum Torque, Nm (lb-ft) 50.1 (37.2)
Torque Speed, rpm 1800
Compression Ratio 22:1
Firing Order 1-2-3
Fuel System Indirect injection
Lubricating System Forced Lubrication by Trochoid Pump
Cooling System Pressurized Radiator, Forced Circulation with Water Pump
Starting System Electric Starting
Fuel Tank Capacity, gal (L) 3.5 (13.0)
Oil Capacity, qts (L) 4.1 (3.9)
Coolant Capacity, qts (L) 5.0 (4.7)
Electrical System Rating, Volts 12

Power Take-Off
PTO Operational Type Transmission
PTO Horsepower, hp (kW) 13.5 (9.7)
Rear PTO Speed, rpm 540/850
Rear PTO / Engine Speed, rpm 540/3000
Rear PTO / Engine Speed, rpm 850/3000
Front PTO Speed, rpm 540
Front PTO / Engine Speed, rpm 540/2800

Transmission Type Hydrostatic (high, low gear shift)
Number of Forward Gears Infinite (2-range)
Number of Reverse Gears Infinite (2-range)
Pump Type Variable displacement piston pump
Motor Type Fixed displacement piston motor
Charge pump type Trochoid pump
Oil Cooler Corrugated fin type radiator
Oil Capacity, qts (L) 14.2 (13.4)
Maximum Forward Speed (Low), mph (kph) 3.5 (5.7)
Maximum Forward Speed (High), mph (kph) 9.1 (14.5)
Maximum Reverse Speed (Low), mph (kph) 2.4 (3.9)
Maximum Reverse Speed (High), mph (kph) 6.2 (10.1)

Wheels and Tires
Drive Wheels 2WD/4WD
Steering Configuration Front Steer
Steering System Manual, ball screw type
Brakes Type Right and left independent with dry drum
Front Tires (2WD) 4.00x9
Rear Tires (2WD) 7.00x16
Front Tires (4WD, AG) 6.00x12
Rear Tires (4WD, AG) 8.00x16
Front Tires (4WD, Turf) 20.5x8.00-10
Rear Tires (4WD, Turf) 29x12.00-15
Front Tread (2WD), in (mm) 26.9-30.3 (685-770)
Rear Tread (2WD), in (mm) 25.9-34.3 (660-870)
Front Tread (4WD), in (mm) 33.8-35.5 (845-895)
Rear Tread (4WD), in (mm) 25.9-34.3 (660-870)

Hydraulic System
Hydraulic System Type Open Center
Hydraulic Pump Type Gear
Implement Pump Flow, gpm (Lpm) 3.0 (11.4)
Hydraulic Pressure, Bar (psi) 117 (1700)
Hydraulic Fluid Capacity, gal (L) 3.6 (13.6)
3-Point Hitch Category 1
Standard Lift Capacity at pin, lb (kg) 880 (400)

Dimensions and Weight
Wheelbase (2WD), in (mm) 54.6 (1390)
Wheelbase (4WD), in (mm) 55.1 (1400)
Length, in (mm) 84.1 (2135)
Height, in (mm) 47.1 (1195)
Overall Width, in (mm) 40 (1015)
Ground Clearance (2WD), in (mm) 9.8 (250)
Ground Clearance (4WD), in (mm) 8.8 (225)
Weight (2WD), lb (kg) 1120 (510)
Weight (4WD), lb (kg) 1260 (570)

Front End Loader
Loader Model Kubota B1630C
Maximum Lift Height at Pin, in (mm) 67.7 (1710)
Clearance with Bucket Dumped, in (mm) 51.5 (1300)
Reach at Full Height, in (mm) 20.3 (510)
Dump Angle at Full Height, deg 46
Reach with Bucket on Ground, in (mm) 48.3 (1220)
Maximum Rollback Angle, deg 28
Bucket Breakout Force, lb (kg) 780 (353)
Lift Capacity to Full Height at Pin, lb (kg) 510 (231)



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