Kubota ZD25 zero-turn mower specs and service data

The Kubota ZD25 is a zero-turn mower model from the ZD series, manufactured from 2005 to 2006 by Kubota. It was available in two-wheel drive (2WD) version.

The Kubota ZD25 is equipped with a 1.0 L (61.1 cu·in) three-cylinder diesel engine with 76.0 mm (2.99 in) of the cylinder bore and 74.0 mm (2.91 in) of the piston stroke, and a hydrostatic transmission with infinite forward and reverse gears.

The Kubota ZD25 zero-turn mower features:

The Kubota D1005 diesel engine which produces 25.3 PS (18.6 kW; 25.0 HP) at 3,000 rpm of horsepower.
Differential power steering
Two-post foldable ROPS
Independent front PTO

General specifications

General Specifications
Model	Kubota ZD25
Tractor type	Zero-turn mower
Production years	2005-2006
Factory	–
Dimensions and weight
Length	2,260 mm (89 in)
Width	–
Height	1,910 mm (75.2 in)
Wheel base	1,360 mm (53.5 in)
Weight	750 kg (1,653 lbs)
Fuel capacity
Fuel tank capacity	30.0 liters (7.9 US gal.; 6.6 Imp. gal)

Engine

Engine Specifications
Engine model	Kubota D1005
Engine type	4-stroke, SOHC, three-cylinders
Displacement	1.0 L, 1,001 cm², (61.1 cu·in)
Bore and stroke	76.0 mm x 73.6 mm (3.0 in x 2.9 in)
Max. horsepower	25.3 PS (18.6 kW; 25.0 HP) at 3,000 rpm
Cooling system	Liquid-cooled
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 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	Differential power
Brakes	–
Transmission
Transmission manufacturer or model	–
Transmission type	Hydrostatic
Gears	Infinite forward and reverse
Speed	Forward: 15.0 kmh (9.3 mph) Reverse: 8.4 kmh (5.2 mph)

Tires

Tires
Front tires	Lawn/turf: 15×6.0-6
Rear tires	Lawn/turf: 24×12-12

PTO (Power take-off shaft)

PTO
Middle PTO type	Independent
Middle PTO speed	–

Electrical system

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

Attachments

Kubota RCK60-28Z: 60″ mid-mount mower deck with 3-blade
Cutting width	1,520 mm (60 in)
Overall width	1,840 mm (72.8 in)
Cut heigh	20-120 mm (1-5 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.

James Christian says:
July 27, 2023 at 4:50 pm
Okay I got this kubota zD25 and I took it to the shop a local fix it guy because it stopped firing he later told me he found water in my tank so he said he drained the tanks and cleaned the injectors but I don’t see any marks where the injectors were touched it is now running but not functioning as it should it has a load and when engaged it looses power in grass that it use to chomp do you think I need to have my injectors cleaned and put all new fuel filter on to correct this issue or what do you advise I do to get my mower back at top running order?

Kubota ZD25