Kubota ZD28 Engine
Engine Model …………… Kubota D1105
Engine Type …………… Vertical water-cooled 4-cycle diesel
Number of Cylinders …………… 3
Displacement, cu.in (L) …………… 68.6 (1.1)
Cylinder Bore, in (mm) …………… 3.07 (78.0)
Piston Stroke, in (mm) …………… 3.09 (78.4)
Aspiration …………… Naturally aspirated
Rated Engine Power, hp (kW) …………… 28.0 (20.9)
Rated Engine Speed, rpm …………… 3000
Idle Speed, rpm …………… 850-950
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) …………… 3.6 (3.4)
Coolant Capacity, qts (L) …………… 4.0 (3.8)
Electrical System
Electrical System Rating, Volts …………… 12
Charging System …………… Alternator
Starting System …………… Electric starter
Battery, AH …………… 65
Power Take Off
PTO Operational Type …………… Independent
PTO Clutch …………… Wet multi disc
PTO Speed, rpm …………… 3000
Kubota ZD28 Transmission
Transmission Type …………… Hydrostatic
Number of Forward Gears …………… Infinite
Number of Reverse Gears …………… Infinite
Maximum Forward Speed, mph (kph) …………… 9.3 (15.0)
Maximum Reverse Speed, mph (kph) …………… 5.2 (8.3)
Wheels and Tires
Drive Wheels …………… 2WD 4×2
Steering Configuration …………… Front steer
Steering System …………… 2-hand levers
Front Tire Size …………… 15×6.00-6
Rear Tire Size …………… 24×12.00-12
Front Tread, in (mm) …………… 38.3 (975)
Rear Tread, in (mm) …………… 42.5 (1065)
Dimensions and Weight
Wheelbase, in (mm) …………… 53.7 (1360)
Overall Length, in (mm) …………… 89 (2260)
Overall Heigth (Steering Wheel), in (mm) …………… 45.3 (1150)
Overall Heigth (ROPS), in (mm) …………… 75.2 (1910)
Overall Width, in (mm) …………… 57.3 (1450)
Weight, lb (kg) …………… 1480 (670)
Mower Deck
Mower Deck Model …………… RCK60-28Z
Mower Deck Type …………… Mid-mount
Number of Blades …………… 3
Cutting Width, in (mm) …………… 60 (1520)
Total Width, in (mm) …………… 72.8 (1840)
Cutting Height, in (mm) …………… 1.0-5.0 (25-127)
Blade Engagement …………… Mechanical
Lift System …………… Hydraulic
Mower Deck Model …………… RCK72-28Z
Mower Deck Type …………… Mid-mount
Number of Blades …………… 3
Cutting Width, in (mm) …………… 72 (1820)
Total Width, in (mm) …………… 75 (1895)
Cutting Height, in (mm) …………… 1.0-5.0 (25-127)
Blade Engagement …………… Mechanical
Lift System …………… Hydraulic