Kubota B7100

Kubota B7100 (1976-1986) compact utility tractor specifications and reviews

Kubota B7100The Kubota B7100 is a compact utility tractor, manufactured by Kubota since 1976 to 1985. The B7100 tractor is equipped with Kubota D750-A diesel engine with 0.8 L (46.5 cu-in) of displacement and unsynchronized gear transmission with 6 forward and 2 reverse gears.

The Kubota B7100 tractor is a compact machine that measures 2,000 mm (78.7 in) in length, 1,010 mm (40.0 in) in width, and 1,150 mm (45.5 in) in height. The Kubota B7100 wheelbase is 1,250 mm (49.5 in), and it weighs 489 kg (1,080 lb). This tractor can be used as a front loader, lawnmower or snowblower.

The B7100 utility tractor used a three-cylinder liquid-cooled diesel engine Kubota D750-A with 762 cc (46.5 cu-in) of displacement. It has 68.0 mm (2.68 in) of the cylinder bore and 70.0 mm (2.76 in) of the piston stroke. Compression ratio rating is 22.0:1. The engine produced 16.2 PS (11.9 KW; 16.0 HP) at 2,800 rpm of horsepower. The oil capacity is 3.9 liters (4.1 US.qts, 3.4 Imp. qts), and the coolant capacity is 4.6 liters (4.9 US.qts, 4.0 Imp. qts). The fuel tank has a capacity of 12.9 liters (3.4 US gal, 2.8 Imp. gal), and the battery is 12V 45Ah.

The Kubota B7100 is equipped with unsynchronized gear transmission with dry plate clutch. The transmission has 6 forward (1.0-13.4 km/h, 0.6-8.3 mph) and 2 reverse (1.5-6.7 km/h, 0.9-4.2 mph) gears.

The Kubota B7100 is avalible in two versions:

  • Kubota B7100E – two-wheel variant 4×2 2WD
  • Kubota B7100D – four-wheel variant 4×4 4WD

The tractor used manual steering, brakes with a differential mechanical expanding shoe, open center hydraulic system and foot pedal operated the differential lock. The B7100 has open operator station.

The hydraulic lift operates at a maximum capacity of 181 kg (400 lb) at the link end, and it has a closed center hydraulic system with a capacity of 13.6 liters (3.6 US gal, 3 Imp. gal) and a flow rate of 11.4 lpm (3.0 gpm).

The front tires come in the size 6-12 for the standard options and 20.5×8.0-10 for lawn and turf while the rear tires come in the size 8-16 for standard options and 29×12.0-15 for lawn and turf tires.

The Kubota B7100 avalible attachments:

  • Front-mount Kubota B222 1,210 mm (48.0 in) two-stage snowblower
  • Front-moun Kubota B748 1,210 mm (48.0 in) front-mount two-stage snowblower
  • Kubota B1630 loader
  • Kubota B219 loader

General Specifications

General Specifications
ModelKubota B7100
Tractor typeСompact utility tractor
Production years1990-1995
Dimensions and weight
Length2,000 mm (78.7 in)
Width1,010 mm (40.0 in)
Height1,150 mm (45.5 in)
Wheelbase1,250 mm (49.5 in)
Weight489 kg (1,080 lb)
Fluid capacity
Fuel tank capacity12.9 liters (3.4 US gal, 2.8 Imp. gal)
Oil capacity3.9 liters (4.1 US.qts, 3.4 Imp. qts)
Coolant capacity4.6 liters (4.9 US.qts, 4.0 Imp. qts)
Front axle differential case0.7 liters (0.74 US.qts, 0.62 Imp. qts)
Front axle gear case0.15 liters (0.16 US.qts, 0.13 Imp. qts)
Hydraulic luid capacity:13.6 liters (3.6 US gal, 3 Imp. gal)
Electrical system
Battery12V 45Ah
Cabin type
Cabin type Standard: Open operator station
Optional: Two-post fixed ROPS (Rollover protection structure)


Engine modelKubota D750-A
Engine type4-stroke, vertical, three-cylinders
Displacement742 cm3, (45.3 cu·in)
Cylinder bore:68.0 mm (2.68 in)
Piston stroke:70.0 mm (2.76 in)
Compression ratio:22.0:1
Max. horsepower Gross: 16.2 PS (11.9 KW; 16.0 HP) at 2,800 rpm
At PTO-shaft: 13.2 PS (9.7 KW; 13.0 HP) at 2,800 rpm
Max. torque
Cooling systemLiquid-cooled
Lubricating systemForced lubrication by pump
Combustion chamberSpherical type
Fuel injection pumpBosch K Type Mini Pump
Injection typeIndirect injection
Injection nozzleBosch throttle type
Firing order1-2-3
Fuel usedDiesel fuel No.2-D
Starting systemElectric starter (12V, 0.8 kW)
Starting support deviceGlow plug in combustion chamber
GovernorCentrifugal ball mechanical governor
PTO shaft rotationCounterclockwise (from PTO shaft side)
Cylinder compression pressure
Cylinder compression:31.5 kgf/cm2 (3.09 MPa, 448 psi)
Compression differential limit between cylinders:10% or less
Valve clearance
Intake valve clearance:0.150-0.200 mm (0.006-0.008 in)
Exhaust valve clearance:0.150-0.200 mm (0.006-0.008 in)
Oil system
Lubrication system:Forced lubrication by pump
Oil type:API CC or better
Oil capacity:3.9 liters (4.1 US.qts, 3.4 Imp. qts)
Oil filter:Full flow paper filter (cartridge type)
Oil pressure: At idle spped: 68 kPa (0.7 kgf/cm2, 10 psi)
At rated speed: 196-441 kPa (2.0-4.5 kgf/cm2, 29-64 psi)
Fuel system
Fuel injection pumpBosch K Type Mini Pump
Injection nozzleBosch throttle Type
Injection timing:25° B.T.D.C.
Fuel injection pressure13.73-14.71 MPa (140-150 kgf/cm2, 1991-2133 psi)
Cooling system
Type:Pressurized radiator, forced circulation with water pump
Thermostat’s valve opening temperature:80.5-83.5°C (176.9-182.3°F)
Temperature at which thermostat completely opens:95°C (203°F)
Coolant capacity4.6 liters (4.9 US.qts, 4.0 Imp. qts)

Transmission and chassis

Transmission and chassis
Chassis B7100E: 4×2 2WD
B7100D: 4×4 4WD
SteeringManual type
BrakesMechanical wet disc brakes
Differential lockMechanical rear
Front axle differential case0.7 liters (0.74 US.qts, 0.62 Imp. qts)
Front axle gear case0.15 liters (0.16 US.qts, 0.13 Imp. qts)
Transmission typeUnsynchronized gear with dry plate type clutch
Gears6 forward and 2 reverse
Ground speed Forward: 1.0-13.4 km/h, (0.6-8.3 mph)
Reverse: 1.5-6.7 km/h, (0.9-4.2 mph)


Tires size
Front tires Standard: 6-12
Lawn and turf: 20.5×8.0-10
Rear tires Standard: 8-16
Lawn and turf: 29×12.0-15

PTO and 3-point linkage

PTO (Power take-off shaft)
PTO Type:Rear, transmission
PTO Speed: Rear: 540 / 750 / 1,000 rpm
Front: 2,800 rpm
Hydraulic lift
3-point linkage:Category I
Control system:
No. of remote valves:
Max lifting capacity (at link end):181 kg (400 lb)

Hydraulic system

Hydraulic system
Type:Closed center
Hydraulic fluid capacity:13.6 liters (3.6 US gal, 3 Imp. gal)
Hydraulic flow:11.4 lpm (3.0 gpm)


Kubota B222: 48″ front-mount two-stage snow blower
Cleaning width:1,210 mm (48.0 in)
Cleaning height:580 mm (23.0 in)
Kubota B748: 48″ front-mount two-stage snow blower
Cleaning width:1,210 mm (48 in)
Kubota B1630 Loader
Height (at pin)1,750 mm (69.2 in)
Lift (full at pin)263 kg (580 lbs)
Breakout430 kg (950 lbs)
Dump angle39°
Rollback angle (ground line)20°
Dump reach530 mm (20.9 in)
Ground reach1,190 mm (46.9 in)
Dump clearance1,370 mm (54.1 in)
Bucket width 1,060 mm (42 in)
1,210 mm (48 in)
1,370 mm (54 in)
Kubota B219 Loader
Height (at pin)1,860 mm (73.5 in)
Lift (full at pin)226 kg (500 lbs)
Dump angle39°
Dump reach550 mm (22.0 in)
Dump clearance1,410 mm (55.75 in)
Bucket width 960 mm (38.0 in)
1,210 mm (48.0 in)

Serial numbers

Serial numbers (Location on clutch housing, left side)

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1 Comment

  1. I need to find pivot pin & bushings for a B7100. Can you direct me how to find he information on the tractor so I can order this part?

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