International Harvester

International Harvester 6788

The International Harvester 6788 is a farm tractor produced from 1981 to 1984. It features a 7.6L 6-cylinder turbocharged diesel engine producing 200 hp, a 12-speed two-range power shift transmission, and four-wheel drive with articulated power steering. The tractor includes a standard cab with heating and air conditioning, and optional western finish interior. It has a fuel capacity of 89 gallons with an optional 139 gallons, and a hydraulic system capacity of 23.6 gallons. The 6788 is equipped with a rear independent 1000 PTO and a III/II rear hitch. Dimensions include a 110 inch wheelbase, 228.3 inch length, and 112 inch width, with a shipping weight of 16,920 lbs. Tires are 18.4-38 front and rear.

Power200 hp

Founded1981 - 1984

Model6788

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Technical Specifications

Detailed specifications and technical data for International Harvester 6788

Power

Engine	200 hp (149.1 kW)
PTO (tested)	170.57 hp (127.2 kW)
PTO (claimed)	170 hp (126.8 kW)
Drawbar (tested)	142.05 hp (105.9 kW)
Drawbar (claimed)	142 hp (105.9 kW)

Engine

Type	turbocharged diesel
Model	International Harvester DT 466B
Power	200 hp (149.1 kW)
Cooling	liquid-cooled
Cylinders	6-cylinder
Rated RPM	2500
Bore/Stroke	4.30x5.35 inches (109 x 136 mm)
Displacement	466 ci (7.6 L)
Oil capacity	20 qts (18.9 L)
Coolant capacity	34 qts (32.2 L)

Capacity

Fuel	89 gal (336.9 L), 139 gal Optional (526.1 L)
Hydraulic system	23.6 gal (89.3 L)

Hydraulics

Type	closed center
Valves	2 to 4
Capacity	23.6 gal (89.3 L)
Pump flow	18 gpm (68.1 lpm)
Steering flow	12 gpm (45.4 lpm)

Mechanical

Cab	Standard with burgundy finish, heat, and air-conditioning. Optional western finish interior.
Drive	Four-wheel drive
Steering	Articulated power steering

Production

Built in	Rock Island, Illinois, USA
Total built	347
Manufacturer	International Harvester
Original price	$70,500 in 1984
Years produced	1981 - 1984

Transmission

Type	two-range power shift
Gears	12 forward and 6 reverse
Details	Left lever selects high, low, or reverse range. Right lever selects gear. On-the-move power shift without the clutch between gear pairs 1/2, 3/4, and 5/6. Synchronized shift (with the clutch) from 2-to-3 and 4-to-5.
Oil capacity	94.5 qts (89.4 L)

Tractor hitch

Rear Type	III/II

Dimensions & Tires

Width	112 inches (284 cm)
Length	228.3 inches (579 cm)
Rear tire	18.4-38
Wheelbase	110 inches (279 cm)
Cab height	114.1 inches (289 cm)
Front tire	18.4-38
Hood height	79.9 inches (202 cm)
Exhaust height	125.4 inches (318 cm)
Shipping weight	16920 lbs (7674 kg)
Ground clearance	28.4 inches (72 cm)