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International Harvester 666 Technical Data

IH 666 Engine Specifications

Diesel Engine

Engine Model ................. International Harvester D312
Engine Type ................. 4-stroke, six-cylinder diesel
Number of Cylinders ................. 6
Displacement, cu in (L) ................. 312 (5.10)
Engine Bore, in (mm) ................. 3.88 (98.0)
Engine Stroke, in (mm) ................. 4.41 (112.0)
Aspiration ................. Natural
Rated Engine Power, hp (kW) ................. 73.0 (54.1)
Rated Engine Speed, rpm ................. 2000
Compression ................. 17:1
Firing Order ................. 1-5-3-6-2-4
Fuel System ................. Direct injection
Fuel Tank Capacity, gal (L) ................. 31.0 (117.3)
Electrical System Rating, Volts ................. 12

Gasoline Engine

Engine Model ................. International Harvester C291
Engine Type ................. 4-stroke, six-cylinder gasoline
Number of Cylinders ................. 6
Displacement, cu in (L) ................. 291 (4.80)
Engine Bore, in (mm) ................. 3.75 (95.0)
Engine Stroke, in (mm) ................. 4.39 (112.0)
Rated Engine Power, hp (kW) ................. 73.0 (54.1)
Rated Engine Speed, rpm ................. 2000
Compression ................. 7.5:1
Air Cleaner ................. Dry elements
Fuel Tank Capacity, gal (L) ................. 31.0 (117.3)
Electrical System Rating, Volts ................. 12

Power Take-Off

PTO Operational Type ................. Independent
PTO Horsepower, hp (kW) ................. 66.3 (49.2)
PTO Clutch ................. Dry disc
PTO Speeds, rpm ................. 540

International Harvester 666 Transmission

Transmission Type ................. Sliding gear
Gearbox Type ................. 5F/1R
Number of Forward Gears ................. 5
Number of Reverse Gears ................. 1
Clutch ................. Dry disc
Maximum Forward Speed, mph (kph) ................. 15.8 (25.3)
Maximum Reverse Speed, mph (kph) ................. 2.8 (4.4)

Transmission Type ................. Hydrostatic
Number of Forward Gears ................. Infinite, 2-range
Number of Reverse Gears ................. Infinite, 2-range
Maximum Forward Speed, mph (kph) ................. 21.0 (33.8)
Maximum Reverse Speed, mph (kph) ................. 21.0 (33.8)

Transmission Type ................. Torque Amplifier
Gearbox Type ................. 10F/2R, 2-speed powershift
Number of Forward Gears ................. 10
Number of Reverse Gears ................. 2
Clutch Type ................. Dry disc
Maximum Forward Speed, mph (kph) ................. 16.5 (26.5)
Maximum Reverse Speed, mph (kph) ................. 3.0 (4.8)

IH 666 Wheels and Tires

Drive Wheels ................. 2WD 4x2
Steering Configuration ................. Front Steer
Steering System ................. Hydrostatic power
Brakes Type ................. Mechanical disc
Front Tire Size ................. 7.50-16
Rear Tire Size ................. 15.5-38
Front Tread, in (mm) ................. 58-82 (1470-2080)
Rear Tread, in (mm) ................. 60-98 (1520-2480)

Hydraulic System

Hydraulic System Type ................. Open Center
Implement Pump Type ................. Gear
Implement Pump Flow, gpm (Lpm) ................. 12.0 (45.5)
Hydraulic Pressure, Bar (psi) ................. 172 (2500)
3-Point Hitch Category ................. 2

IH 666 Dimensions and Weight

Wheelbase, in (mm) ................. 103 (2610)
Length, in (mm) ................. 162 (4110)
Height (Exhaust), in (mm) ................. 105 (2660)
Overall Width, in (mm) ................. 89.4 (2270)
Ground Clearance, in (mm) ................. 21 (530)
Weight, lb (kg) ................. 7055 (3200)