Kubota ZD28

Kubota ZD28The Kubota ZD28 is a zero-turn mower model from the ZD series, manufactured by Kubota from 2002 to 2006. It was available in two-wheel drive (2WD) version.

The Kubota ZD28 is equipped with a 1.1 L (68.5 cu·in) three-cylinder diesel engine with 78.0 mm (3.07 in) of the cylinder bore and 78.4 mm (3.09 in) of the piston stroke, and a hydrostatic transmission with infinite forward and reverse gears.

The Kubota ZD28 zero-turn mower features:

  • The Kubota D1105 diesel engine which produces 28.4 PS (20.9 kW; 28.0 HP) of horsepower
  • 2-Hand levers steering
  • Internal expanding shoe brakes
  • Open operator station with two-post ROPS
  • Independent front PTO with 2,540 rpm

General specifications

General Specifications
ModelKubota ZD28
Tractor typeZero-turn mower
Production years2002-2006
Dimensions and weight
Length2,260 mm (89 in)
Width1,450 mm (57.1 in)
Height1,190 mm (46.9 in)
Wheel base1,360 mm (53.5 in)
Weight650 kg (1,433 lbs)
Fuel capacity
Fuel tank capacity30.0 liters (7.9 US gal.; 6.6 Imp. gal)


Engine Specifications
Engine modelKubota D1105
Engine type4-stroke, SOHC, three-cylinders
Displacement1.1 L, 1,123 cm3, (68.5 cu·in)
Bore and stroke78.0 mm X 78.4 mm (3.07 in X 3.09 in)
Max. horsepower28.4 PS (20.9 kW; 28.0 HP)
Cooling systemLiquid-cooled
Coolant capacity:3.8 L (4 US. qt, 3.3 Imp. qt.)
Fuel usedDiesel fuel
Starting systemElectric starting with 12V starter
Starting support deviceGlow plug in combustion chamber
GovernorAll speed mechanical governor
Charging systemAlternator 12V
PTO shaft rotationCounterclockwise
Valve clearance
Intake valve clearance:0.145-0.185 mm (0.0057-0.0073 in)
Exhaust valve clearance:0.145-0.185 mm (0.0057-0.0073 in)
Oil system
Lubrication system:Forced lubrication by trochoid pump
Oil type:CF or higher
Recommended oil:SAE 10W-30, 10W-40
Oil capacity:3.4 L (3.6 US. qt, 3 Imp. qt.)
Oil pressure: At idle speed: 49 MPa (0.5 kgf/cm2, 7 psi)
At rated speed: 196 to 441 MPa (2.0-4.5 kgf/cm2, 28 to 64 psi)
Oil filter:Full flow paper filter (Cartridge type)
Oil pressure indicating:Electrical type switch
Oil and oil filter change interval:Every 200 hours
Fuel system
Fuel injection pump:Bosch MD type mini fuel injection pump
Injection nozzle:Mini Nozzle (DNOPD)
Firing order:1-2-3
Injection pressure:13.73 MPa (140 kgf/cm2, 1,991 psi)

Transmission and chassis

Chassis, steering and brakes
Chassis4×2 2WD
Steering type2-Hand levers
BrakesInternal expanding shoe
Transmission manufacturer or modelHST
Transmission typeHydrostatic
GearsInfinite forward and reverse
Speed Forward: 15.0 kmh (9.3 mph)
Reverse: 8.3 kmh (5.2 mph)
Transmission oil capacity4.0 L (1.1 US. gal, 0.9 Imp. gal.)


Front tiresLawn/turf: 15×6.0-6
Rear tiresLawn/turf: 23×10.5-12

PTO (Power take-off shaft)

Middle PTO typeIndependent
Middle PTO speed2,540 rpm

Electrical system

Electrical system
Charging system
Charging amps
Battery12V, CCA: 450A


Kubota RCK60-28Z: 60″ mid-mount mower with 3-blade
Cutting width1,520 mm (60.0 in)
Overall width1,840 mm (72.8 in)
Cut height20-120 mm (1 to 5 in)
Kubota RCK72-28Z: 72″ mid-mount mower with 3-blade
Cutting width1,820 mm (72.0 in)
Overall width1,900 mm (75.0 in)
Cut height20-120 mm (1 to 5 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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