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Home / Wheel Loaders / Kubota Wheel Loaders / Kubota R420S

Kubota R420S Specifications

The Kubota R420S wheel loader is powered by 91.4 cu.in (1.5L) Kubota D1503-M-TE3 three-cylinder indirect injection turbocharged diesel engine with a rated power of 39 hp (29 kW) at 2600 rpm. The Kubota R420S is equipped with a hydrostatic transmission, power steering system, wet disc brakes, and 12.5/70x16 standard tires. The hydraulic system has a pump with fluid flow rate of 11.1 gpm (42.1 lpm). The hydraulic pressure is 3000 psi (206 bar). The wheel loader has a rated operating capacity of 1915 lbs (870 kg) and tipping load of 3830 lbs (1740 kg). The max lift height is 110.6 inches (2810 mm) to hinge pin, and boom breakout force is 6560 lbs (2980 kg).

Engine Specs

Engine Model .................... Kubota D1503-M-TE3
Engine Type .................... 4-stroke vertical water-cooled diesel
Number of Cylinders .................... Three
Cylinder Bore, in (mm) .................... 3.27 (83.0)
Piston Stroke, in (mm) .................... 3.64 (92.4)
Total Displacement, cu.in (L) .................... 91.4 (1.49)
Rated Engine Power, hp (kW) .................... 39.0 (29.0)
Rated Engine Speed, rpm .................... 2600
Idling Speed, rpm .................... 750-850
Aspiration Type .................... Turbocharged
Combustion Chamber .................... Spherical type
Direction of Rotation .................... Counter-clockwise
Compression Ratio .................... 23:1
Firing Order .................... 1-2-3
Fuel System .................... Indirect injection
Injection Pump .................... Bosch type mini pump
Injection Nozzle .................... Bosch throttle type
Governor Type .................... Centrifugal, mechanical
Lubricating System .................... Forced lubrication by trochoid pump
Oil Filter Type .................... Full flow cartridge, paper element
Cooling System .................... Pressurized radiator, forced circulation with water pump
Starting System .................... Electric starting with starter
Intake Valve Clearance, in (mm) .................... 0.007-0.009 (0.18-0.22)
Exhaust Valve Clearance, in (mm) .................... 0.007-0.009 (0.18-0.22)
Fuel Tank Capacity, gal (L) .................... 14.2 (54.0)
Oil Capacity, qts (L) .................... 5.9 (5.6)
Coolant Capacity, qts (L) .................... 7.4 (7.0)
Electrical System Rating, Volts .................... 12
Charging System .................... Alternator
Alternator Rating, Amps .................... 75

Transmission

Transmission Type .................... Hydrostatic
Number of Forward Gears .................... Infinite
Number of Reverse Gears .................... Infinite
Maximum Forward Speed, mph (kph) .................... 12.5 (20.0)
Maximum Reverse Speed, mph (kph) .................... 12.5 (20.0)

Wheels and Tires

Drive System Type .................... Four-wheel drive (4WD)
Steering Configuration .................... Articulated frame
Steering System .................... Hydrostatic power
Service Brakes Type .................... Wet disc
Front Tire Size (Std) .................... 12.5/70x16
Rear Tire Size (Std) .................... 12.5/70x16
Front Tire Size (Opt) .................... 33x12.50x15
Rear Tire Size (Opt) .................... 33x12.50x15

Hydraulic System

Hydraulic System Type .................... Open center
Hydraulic Pump Type .................... Gear
Pump Capacity, gpm (Lpm) .................... 11.1 (42.1)
System Pressure, psi (Bar) .................... 3000 (206)
Hydraulic Tank Capacity, gal (L) .................... 11.0 (42.0)
Hydraulic System Capacity, gal (L) .................... 15.8 (60.0)

Loader Performance

Rated Operating Capacity (Straight, Canopy), lbs (kg) .................... 2290 (1040)
Rated Operating Capacity (Full Turn, Canopy), lbs (kg) .................... 1915 (870)
Tipping Load (Straight, Canopy), lbs (kg) .................... 4580 (2080)
Tipping Load (Full Turn, Canopy), lbs (kg) .................... 3830 (1740)
Lift Capacity, lbs (kg) .................... 3960 (1800)
Breakout Force, lbs (kg) .................... 6560 (2980)

Dimensions and Weight

Maximum Working Height, in (mm) .................... 137.8 (3500)
Maximum Lift Height At Hinge Pin, in (mm) .................... 110.6 (2810)
Height To Top Of Canopy, in (mm) .................... 98.8 (2510)
Length With Bucket On Ground, in (mm) .................... 165.7 (4210)
Width (Tread Center), in (mm) .................... 46.5 (1180)
Width (Over Tires), in (mm) .................... 59.8 (1520)
Wheel Base, in (mm) .................... 69.9 (1775)
Ground Clearance, in (mm) .................... 11.2 (285)
Articulation Angle, deg .................... 40
Bucket Width, in (mm) .................... 60 (1525)
Bucket Capacity, cu.ft (m3) .................... 14.1 (0.40)
Dump Angle At Full Height, deg .................... 45
Clearance With Bucket Dumped, in (mm) .................... 88.4 (2245)
Reach At Full Height, in (mm) .................... 30.8 (780)
Turning Circle (w/Bucket), in (mm) .................... 142.9 (3630)
Operating Weight (Canopy), lbs (kg) .................... 6700 (3050)

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