Kubota ZD28 zero-turn mower specs and service data

The 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
Model	Kubota ZD28
Tractor type	Zero-turn mower
Production years	2002-2006
Factory	–
Dimensions and weight
Length	2,260 mm (89 in)
Width	1,450 mm (57.1 in)
Height	1,190 mm (46.9 in)
Wheel base	1,360 mm (53.5 in)
Weight	650 kg (1,433 lbs)
Fuel capacity
Fuel tank capacity	30.0 liters (7.9 US gal.; 6.6 Imp. gal)

Engine

Engine Specifications
Engine model	Kubota D1105
Engine type	4-stroke, SOHC, three-cylinders
Displacement	1.1 L, 1,123 cm³, (68.5 cu·in)
Bore and stroke	78.0 mm X 78.4 mm (3.07 in X 3.09 in)
Max. horsepower	28.4 PS (20.9 kW; 28.0 HP)
Cooling system	Liquid-cooled
Coolant capacity:	3.8 L (4 US. qt, 3.3 Imp. qt.)
Fuel used	Diesel fuel
Starting system	Electric starting with 12V starter
Starting support device	Glow plug in combustion chamber
Governor	All speed mechanical governor
Charging system	Alternator 12V
PTO shaft rotation	Counterclockwise
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
Chassis	4×2 2WD
Steering type	2-Hand levers
Brakes	Internal expanding shoe
Transmission
Transmission manufacturer or model	HST
Transmission type	Hydrostatic
Gears	Infinite forward and reverse
Speed	Forward: 15.0 kmh (9.3 mph) Reverse: 8.3 kmh (5.2 mph)
Transmission oil capacity	4.0 L (1.1 US. gal, 0.9 Imp. gal.)

Tires

Tires
Front tires	Lawn/turf: 15×6.0-6
Rear tires	Lawn/turf: 23×10.5-12

PTO (Power take-off shaft)

PTO
Middle PTO type	Independent
Middle PTO speed	2,540 rpm

Electrical system

Electrical system
Ground	Negative
Charging system	–
Charging amps	–
Battery	12V, CCA: 450A

Attachments

Kubota RCK60-28Z: 60″ mid-mount mower with 3-blade
Cutting width	1,520 mm (60.0 in)
Overall width	1,840 mm (72.8 in)
Cut height	20-120 mm (1 to 5 in)
Kubota RCK72-28Z: 72″ mid-mount mower with 3-blade
Cutting width	1,820 mm (72.0 in)
Overall width	1,900 mm (75.0 in)
Cut height	20-120 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.

Kubota ZD28