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  Wheel Loaders

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Case 621B Specifications

The Case 621B wheel loader is powered by 359 cu.in (5.9L) Case 6T-590 4-cylinder turbocharged diesel engine with a rated power of 126 hp (93.9 kW) at 2200 rpm. The Case 621B is equipped with a 4x3 full powershift transmission, power steering system, hydraulic wet disc brakes, and 20.5x25 standard tires. The hydraulic system has a pump with fluid flow rate of 56.4 gpm (213 lpm). The hydraulic pressure is 2250 psi (155 bar). The wheel loader has a rated operating capacity of 8700 lbs (3945 kg) and tipping load of 17400 lbs (7890 kg). The maximum lift height is 144.9" (3680 mm) to hinge pin, and bucket breakout force is 24800 lbs (11250 kg).

Engine Model .................... Case 6T-590
Engine Type .................... 4-Stroke direct injection liquid-cooled diesel
Number of Cylinders .................... 6
Displacement, cu in (L) .................... 359 (5.90)
Engine Bore, in (mm) .................... 4.02 (102.0)
Engine Stroke, in (mm) .................... 4.72 (120.0)
Aspiration Type .................... Turbocharged
Rated Engine Power, hp (kW) .................... 126.0 (93.9)
Rated Engine Speed, rpm .................... 2200
Low Idle Speed, rpm .................... 950-1000
High Idle Speed, rpm .................... 2300-2350
Maximum Torque, Nm (ft-lb) .................... 581 (429)
Torque Speed, rpm.................... 1400
Compression Ratio .................... 17.5:1
Firing Order .................... 1-5-3-6-2-4
Fuel System .................... Injection pump
Fuel Filter Type .................... Full flow spin-on cartridge
Governor Type .................... Mechanical
Lubricating System .................... Positive pressure
Cooling System .................... Liquid-cooled
Air Cleaner Type .................... Dry element
Fuel Tank Capacity, gal (L) .................... 51.0 (193.0)
Oil Capacity, qts (L) .................... 16.0 (15.1)
Coolant Capacity, qts (L) .................... 27.8 (26.5)
Electrical System Rating, Volts .................... 12
Charging System .................... Alternator
Alternator Rating, Amps .................... 65

Transmission Type .................... Full powershift
Gearbox Type .................... 4F/3R
Number of Forward Gears .................... 4
Number of Reverse Gears .................... 3
Clutch Type .................... Hydraulic multi-disc
Torque Converter Type .................... Single stage, integral
Torque Converter Ratio .................... 2.90:1
Oil Capacity, gal (L) .................... 5.0 (18.9)
Maximum Forward Speed, mph (kph) .................... 20.6 (33.2)
Maximum Reverse Speed, mph (kph) .................... 15.1 (24.2)

Drive System Type .................... Four-wheel drive (4WD)
Steering Configuration .................... Articulated frame
Steering System .................... Hydrostatic power
Service Brakes Type .................... Hydraulic wet disc
Front Tire Size (Std) .................... 20.5x25
Rear Tire Size (Std) .................... 20.5x25
Front Tire Size (Opt) .................... 17.5x25
Rear Tire Size (Opt) .................... 17.5x25

Hydraulic System Type .................... Open center
Hydraulic Pump Type .................... Dual gear
Pump Capacity, gpm (Lpm) .................... 56.4 (213.0)
System Pressure, psi (Bar) .................... 2250 (155)
Hydraulic Reservoir Capacity, gal (L) .................... 23.8 (90.1)
Hydraulic System Capacity, gal (L) .................... 40.5 (153.3)

Rated Operating Capacity (Straight), lbs (kg) .................... 10260 (4655)
Rated Operating Capacity (Full Turn), lbs (kg) .................... 8700 (3945)
Tipping Load (Straight), lbs (kg) .................... 20520 (9310)
Tipping Load (Full Turn), lbs (kg) .................... 17400 (7890)
Breakout Force, lbs (kg) .................... 24800 (11250)

Maximum Operating Height .................... 187.8 (4770)
Maximum Lift Height To Hinge Pin, in (mm) .................... 144.9 (3680)
Height To Top Of Cab, in (mm) .................... 128.3 (3260)
Length With Bucket On Ground, in (mm) .................... 266.1 (6760)
Width (Tread Center), in (mm) .................... 74 (1880)
Width (Over Tires), in (mm) .................... 96 (2440)
Wheel Base, in (mm) .................... 114.2 (2900)
Ground Clearance, in (mm) .................... 16.7 (425)
Departure Angle, deg .................... 28
Articulation Angle, deg .................... 40
Bucket Width, in (mm) .................... 100 (2540)
Bucket Capacity, cu.ft (m3) .................... 60.7 (1.72)
Digging Depth, in (mm) .................... 2.8 (70)
Dump Angle At Full Height, deg .................... 45
Clearance With Bucket Dumped, in (mm) .................... 114.4 (2905)
Reach At Full Height, in (mm) .................... 37.7 (960)
Turning Circle (w/Bucket), in (m) .................... 449 (11.4)
Operating Weight, lbs (kg) .................... 26200 (11885)

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Wheel Loaders, Skid Steers, and Compact Track Loaders