Kubota ZD21

Kubota ZD21The Kubota ZD21 is a 2WD zero-turn mower from the ZD series. This tractor was manufactured by Kubota from 2001 to 2006. The Kubota ZD21 is equipped with a 0.8 L three-cylinder diesel engine and hydrostatic transmission with infinite forward and reverse gears.

The Kubota ZD21 zero-turn mower used the Kubota D782 engine. It is a 0.8 L, 778 cm2, (47.5 cu·in) three-cylinder natural aspirated diesel engine with 67.0 mm (2.64 in) of the cylinder bore and 73.6 mm (2.9 in) of the piston stroke. This engine produced 21.4 PS (15.7 kW; 21.0 HP) of gross output power.

The Kubota ZD21 is equipped with 2-hand levers steering, internal expanding shoe brakes, open operator station with two-post ROPS and 30.0 liters (7.9 US gal.; 6.6 Imp. gal) fuel tank.

Following attachments are available for the Kubota ZD21 zero-turn mower:

  • Mid-mount Kubota RCK54: 54 in (1,370 mm) mower deck with 3-blades
  • Mid-mount Kubota RCK60: 60 in (1,520 mm) mower deck with 3-blades

Kubota ZD21 Specifications

General Specifications
Model Kubota ZD21
Length 2,040 mm (80.3 in)
Width With 54 in deck: 1,330 mm (52.4 in)
With 60 in deck: 1,450 mm (57.1 in)
Height With 54 in deck: 1,180 mm (46.5 in)
With 60 in deck: 1,190 mm (47.0 in)
Wheel base 1,250 mm (49.2 in)
Weight With 54 in deck: 560 kg (1,235 lbs)
With 60 in deck: 570 kg (1,260 lbs)
Fuel tank capacity 30.0 liters (7.9 US gal.; 6.6 Imp. gal)
Battery 12V, CCA: 450A
Cabin type Open operator station with two-post ROPS
Engine model Kubota D782
Engine type Four-stroke, liquid-cooled, inline
Cylinders 3
Fuel type Diesel
Displacement 0.8 L, 778 cm2, (47.5 cu·in)
Bore and stroke 67.0 mm X 73.6 mm (2.64 in X 2.9 in)
Horsepower 21.4 PS (15.7 kW; 21.0 HP)
Starter Electric
Oil type SAE 10W-30, API: CC or CD
Oil capacity: 3.5 L (3.7 US. qt, 3.1 Imp. qt.)
Coolant capacity: 2.6 L (2.7 US. qt, 2.3 Imp. qt.)
Transmission and chassis
Chassis 4×2 2WD
Steering type 2-Hand levers
Brakes Internal expanding shoe
Rear axle gear case 1.8 L (1.9 US qt, 1.6 Imp. qt)
Mower gear case oil 0.4 L (0.42 US qt, 0.35 Imp. qt)
Transmission model HST
Transmission type Hydrostatic
Gears Infinite forward and reverse
Speed Forward: 15.0 kmh (9.3 mph) Reverse: 8.3 (5.2 mph)
Transmission oil capacity 4.0 L (1.1 US. gal, 0.9 Imp. gal.)
Front tires Lawn/turf: 15×6.0-6
Rear tires Lawn/turf: 23×10.5-12 (with 54 in deck), 24×12.0-12 (with 60 in deck)
PTO (Power take-off shaft)
Middle PTO type Independent
Middle PTO spped 2,530 rpm
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We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. In addition, the characteristics may vary depending on the modification and market. We do not provide advice on technical issues related to the any operation or repair. We do not recommend using provided information for repairing or spare parts ordering, use only official service manuals and spare-parts catalogs.

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