Kubota B7100HST

Kubota B7100HSTThe Kubota B7100HST is an utility tractor model manufactured from 1977 to 1984 by Kubota in Japan. It was available in two-wheel drive (B7100HST-E) or four-wheel drive (B7100HST-D) versions.

The Kubota B7100HST is equipped with a 742 cc (41.2 cu·in) three-cylinder diesel engine with 64.0 mm (2.52 in) of the cylinder bore and 70.0 mm (2.76 in) of the piston stroke, and a hydrostatic transmission with infinite forward and reverse (2-range) gears.

The Kubota B7100HST utility tractor features:

  • The D650-AH diesel engine which produces 16.2 PS (11.9 kW; 16.0 HP) at 2,800 rpm of horsepower
  • Manual steering
  • Mechanical wet disc brakes brakes
  • Open operator station with two-post ROPS
  • Category I rear hitch with 180 kg (397 lbs) of maximum lift capacity
  • Front PTO with 2,800 rpm
  • Middle PTO with 2,500 rpm
  • Transmission rear PTO with 540 rpm

General specifications

General Specifications
ModelKubota B7100HST
Tractor typeUtility tractor
Production years1977-1984
Dimensions and weight
Length2,120 mm (83.5 in)
Width1,010 mm (39.8 in)
Height (steering wheel) 2WD: 1,170 mm (46.1 in)
4WD: 1,180 mm (46.5 in)
Wheel base 2WD: 1,380 mm (54.3 in)
4WD: 1,390 mm (54.7 in)
Ground clearance 2WD: 250 mm (9.8 in)
4WD: 240 mm (9.4 in)
Weight 2WD: 522 kg (1,151 lbs)
4WD: 573 kg (1,263 lbs)
Fuel capacity
Fuel tank capacity13.0 liters (3.4 US gal.; 2.9 Imp. gal)


Engine Specifications
Engine modelD750-AH
Engine type4-stroke, vertical, three-cylinders
Displacement742 cm3, (45.3 cu·in)
Compression ratio:22.0:1
Cylinder bore:68.0 mm (2.68 in)
Piston stroke:70.0 mm (2.76 in)
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)
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 (4.12 US.qts, 3.43 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 (4.86 US.qts, 4.05 Imp. qts)

Transmission and chassis

Chassis, steering and brakes
Chassis4×2 2WD or 4×4 MFWD 4WD
Steering typeManual
BrakesMechanical wet disc brakes
Differential lockMechanical rear
Front axle differential case1.5 liters (1.59 US.qts, 1.32 Imp. qts)
Front axle gear case0.5 liters (0.53 US.qts, 0.44 Imp. qts)
Transmission manufacturer or model
Transmission typeHydrostatic
GearsInfinite forward and reverse (2-range)
Speed Forward: 14.5 kmh (9.0 mph)
Reverse: 10.0 kmh (6.2 mph)
Transmission oil capacity13.5 L (3.6 US. gal, 3 Imp. gal.)


Front tires Ag:: 6.9-9 (2WD), 6-12 (4WD)
Lawn/turf:: 20.5×8.00-10
Rear tires Ag:: 8.3-16
Lawn/turf:: 29×12.00-15

Rear Hitch

Three-Point Hitch
Control type
Lift capacity (at ends)180 kg (397 lbs)

PTO (Power take-off shaft)

Front PTO type
Front PTO speed2,800 rpm
Middle PTO type
Middle PTO speed2,500 rpm
Rear PTO typeTransmission
Rear PTO speed540 rpm

Electrical system

Electrical system
Charging systemAlternator
Charging amps
Battery12V 45Ah

Hydraulic system

Hydraulic system
Hydraulic typeOpen center
Pressure1710 psi (117.9 bar)
Pump flow3.1 gpm (11.7 lpm)


Kubota RC60-71: 60″ mid-mount mower deck with 3-blade and hydraulic lift
Cutting width width:1,520 mm (60 in)
Kubota B1630C Loader
Height (at pin)1,710 mm (67.7 in)
Lift (full at pin)231 kg (510 lbs)
Breakout353 kg (780 lbs)
Dump angle46°
Rollback angle (ground line)28°
Dump reach510 mm (20.25 in)
Ground reach1,220 mm (48.3 in)
Dump clearance1,300 mm (51.5 in)
Bucket width1,210 mm (48 in)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

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