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
ModelKubota ZD21
Length2,040 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 base1,250 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 capacity30.0 liters (7.9 US gal.; 6.6 Imp. gal)
Battery12V, CCA: 450A
Cabin typeOpen operator station with two-post ROPS
Engine modelKubota D782
Engine typeFour-stroke, liquid-cooled, inline
Fuel typeDiesel
Displacement0.8 L, 778 cm2, (47.5 cu·in)
Bore and stroke67.0 mm X 73.6 mm (2.64 in X 2.9 in)
Horsepower21.4 PS (15.7 kW; 21.0 HP)
Oil typeSAE 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
Chassis4×2 2WD
Steering type2-Hand levers
BrakesInternal expanding shoe
Rear axle gear case1.8 L (1.9 US qt, 1.6 Imp. qt)
Mower gear case oil0.4 L (0.42 US qt, 0.35 Imp. qt)
Transmission modelHST
Transmission typeHydrostatic
GearsInfinite forward and reverse
Speed Forward: 15.0 kmh (9.3 mph) Reverse: 8.3 (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 (with 54 in deck), 24×12.0-12 (with 60 in deck)
PTO (Power take-off shaft)
Middle PTO typeIndependent
Middle PTO spped2,530 rpm
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