The 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 | |
| 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.) |
| Tires | |
| 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 |