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 listed engine power is Diesel (listed): 200 hp / 149.1 kW. Transmission: 12 forward and 6 reverse. Operating weight: 16920 lbs 7674 kg.
Engine Power
Diesel (listed): 200 hp / 149.1 kW
Fuel & Capacities
89 gal
336.9 L
Transmission
12 forward and 6 reverse
Operating Weight
16920 lbs
7674 kg
Overview
 | 1981 - 1984
60 2+2 Series |
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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 | |
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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
Recommended Implements & Sizing Guide
Engineering recommendations for International Harvester 6788 based on its 200 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 5 to 7 Bottom (18")5 - 7 铧 (45 cm) | Commercial / Field Scale | Large acreage tillage; requires front ballast weights. |
Rotary Cutter / MowerMowing & Clearing | 15 to 20 ft Batwing4.6 - 6.1 m 宽幅折叠翼 | Commercial / Field Scale | Large commercial field and roadside mowing operations. |
Rotary TillerSeedbed Prep | 90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机 | Commercial / Field Scale | Deep intensive seedbed preparation for commercial row crops. |
Disc HarrowSecondary Tillage | 15 to 22 ft Folding Disc4.5 - 6.7 m 折叠式圆盘耙 | Commercial / Field Scale | Wide commercial field leveling; requires hydraulic remotes. |
Hay BalerHay & Forage | Large Square Baler (3x4 or 4x4)大方捆商用打捆机 (1.2x1.2 m) | Commercial / Field Scale | High-capacity commercial forage harvesting (1000 RPM PTO). |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for International Harvester 6788.
Estimated Continuous Field Runtime: 8.6 hrs
Approximately 8.6 hours of continuous field operation at ~75% rated power on a full tank (89 gal / 336.9 L).
Estimated 75% Load Fuel Burn~10.4 gal/hr (39.4 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
International Harvester 6788 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for International Harvester 6788.
Converted Equivalents:
Horsepower (HP)200 hp
Kilowatts (kW)149.1 kW
Metric Horsepower (PS / CV)202.8 PS
Direct Competitor Comparison
Compare International Harvester 6788 against same-era industry alternatives in the same horsepower class.
Current Model
International Harvester
International Harvester 6788
Engine Power:Diesel (listed): 200 hp / 149.1 kW
★ Baseline Reference
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