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Kubota ZD21 Zero Turn Mower Specs

Kubota ZD21 Engine

Engine Model ............... Kubota D782
Engine Type ............... Vertical water-cooled 4-cycle diesel
Number of Cylinders ............... Three
Displacement, cu.in (L) ............... 47.5 (0.8)
Cylinder Bore, in (mm) ............... 2.64 (67.0)
Piston Stroke, in (mm) ............... 2.90 (73.6)
Aspiration ............... Naturally aspirated
Rated Engine Power, hp (kW) ............... 21.0 (15.7)
Rated Engine Speed, rpm ............... 3200
Idle Speed, rpm ............... 900-1000
Compression Ratio ............... 24:1
Firing Order ............... 1-2-3
Fuel System ............... Indirect injection
Governor Type ............... All speed mechanical governor
Lubricating System ............... Forced lubrication by gear pump
Oil Filter ............... Full flow cartridge type
Combustion Chamber ............... Spherical type (E-TVCS)
Fuel Tank Capacity, gal (L) ............... 7.9 (30.0)
Oil Capacity, qts (L) ............... 3.9 (3.6)
Coolant Capacity, qts (L) ............... 3.3 (3.1)

Electrical System

Electrical System Rating, Volts ............... 12
Charging System ............... Alternator
Starting System ............... Electric starter
Battery, AH ............... 36

Power Take Off

PTO Operational Type ............... Independent
PTO Clutch ............... Wet multi disc
PTO Speed, rpm ............... 3200

Kubota ZD21 Transmission

Transmission Type ............... Hydrostatic
Number of Forward Gears ............... Infinite
Number of Reverse Gears ............... Infinite
Maximum Forward Speed, mph (kph) ............... 9.4 (15.1)
Maximum Reverse Speed, mph (kph) ............... 5.2 (8.3)

Wheels and Tires

Drive Wheels ............... 2WD 4x2
Steering Configuration ............... Front steer
Steering System ............... 2-hand levers
Front Tire Size ............... 15x6.00-6
Rear Tire Size ............... 24x12.00-12
Front Tread, in (mm) ............... 38.3 (975)
Rear Tread, in (mm) ............... 42.5 (1065)

Dimensions and Weight

Wheelbase, in (mm) ............... 49 (1240)
Overall Length, in (mm) ............... 80.3 (2030)
Overall Heigth (Steering Wheel), in (mm) ............... 45.3 (1150)
Overall Heigth (ROPS Folded), in (mm) ............... 75.2 (1910)
Overall Width, in (mm) ............... 57.3 (1450)
Weight, lb (kg) ............... 1395 (630)

Mower Deck

Mower Deck Model ............... RCK54-21Z
Mower Deck Type ............... Mid-mount
Number of Blades ............... 3
Cutting Width, in (mm) ............... 54 (1370)
Total Width, in (mm) ............... 66.5 (1690)
Cutting Height, in (mm) ............... 1.0-5.0 (25-127)
Blade Engagement ............... Mechanical
Lift System ............... Hydraulic

Mower Deck Model ............... RCK60-21Z
Mower Deck Type ............... Mid-mount
Number of Blades ............... 3
Cutting Width, in (mm) ............... 60 (1520)
Total Width, in (mm) ............... 74 (1870)
Cutting Height, in (mm) ............... 1.0-5.0 (25-127)
Blade Engagement ............... Mechanical
Lift System ............... Hydraulic