International Harvester 6788

The International Harvester 6788 is a tractor produced by International Harvester. It is equipped with a 466 ci 7.6 L engine. The rated power output is 200 hp 149.1 kW. Transmission: 12 forward and 6 reverse. Operating weight: 16920 lbs 7674 kg.

Overview

	1981 - 1984 60 2+2 Series
1981 - 1984
60 2+2 Series

Production
Manufacturer	International Harvester
Built in Rock Island, Illinois, USA
Total built	347
Original price was $70,500 in 1984

International Harvester 6788 Engine
International Harvester 7.6L 6-cyl diesel
Engine details ...

International Harvester 6788 Transmission
12-speed two-range power shift
Transmission details ...

International Harvester 6788 Power
Engine	200 hp 149.1 kW
Drawbar (claimed)	142 hp 105.9 kW
PTO (claimed)	170 hp 126.8 kW
Drawbar (tested)	142.05 hp 105.9 kW
PTO (tested)	170.57 hp 127.2 kW
Performance test details ...

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

Capacity
Fuel	89 gal 336.9 L
	139 galOptOptional 526.1 L
Hydraulic system	23.6 gal 89.3 L

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

Tractor hitch
Rear Type	III/II

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	1000

Dimensions & Tires
Wheelbase	110 inches 279 cm
Weight	16920 lbs 7674 kg
Front tire	18.4-38
Rear tire	18.4-38
Full dimensions and tires ...

References
2+2 Tractors 130/150/170 HP published in 1981, by International Harvester

Engine

Engine Detail — 466 ci / 7.6 L Diesel

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

International Harvester 6788 Engine

Transmission

Transmission — 12 forward and 6 reverse two-range power shift

Type	two-range power shift
Gears	12 forward and 6 reverse
Oil capacity	94.5 qts 89.4 L
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.
With 18.4-38 tires.

Dimensions

International Harvester 6788 Tires
Ag front	18.4-38
Ag rear	18.4-38

Dimensions
Wheelbase	110 inches 279 cm
Length	228.3 inches 579 cm
Width	112 inches 284 cm
Shipping weight	16920 lbs 7674 kg
Ground clearance	28.4 inches 72 cm

International Harvester 6788 Height
Hood	79.9 inches 202 cm
Cab	114.1 inches 289 cm
Exhaust	125.4 inches 318 cm

Tests

Nebraska Tractor Test 1377
Diesel 12-speed 4WD November 5 - 17, 1980 Link: Nebraska Tractor Test 1377 file
PTO performance
Power at rated engine speed	170.57 hp 127.2 kW
Fuel use	10.9 gal/hour 41.3 l/hour
Power at rated PTO speed	166.39 hp 124.1 kW
Fuel use	9.7 gal/hour 36.7 l/hour
Drawbar performance
Max power	142.05 hp 105.9 kW
Fuel use	10.7 gal/hour 40.5 l/hour
Gear 3-Low-Direct used for power test.
Max pull	19069 lbs 8649 kg
Gear 1-Low-Direct used for pull test.

Photos

International Harvester 6788