International Harvester 784 Overview
The International Harvester 784 is listed from 1977 through 1984 with a 246 cu in (4.0 L) diesel engine rated at 2,400 rpm. Published drivetrain data lists both an 8-forward/4-reverse syncromesh arrangement and a 16-forward/8-reverse two-speed power-shift arrangement, so the actual transmission must be identified before a repair, capacity, or part is chosen.
A University of Nebraska record documents Test 1315 for an International 784 row-crop diesel with an 8-speed transmission. That report belongs to that specific test tractor, not every 784; utility, low-profile, four-wheel-drive, and different transmission configurations are separately listed in the model data.
The serial-number plate is listed on the right side of the frame above the front axle. Record that number, the installed transmission, PTO, and drive configuration before using a manual or ordering a component.
International Harvester 784 Quick Answers
- What engine is in an International Harvester 784?The 784 is listed with a 246 cu in (4.0 L) diesel engine rated at 2,400 rpm.
- What transmissions were offered on the 784?Published 784 records list an 8-forward/4-reverse syncromesh transmission and a 16-forward/8-reverse two-speed power-shift arrangement. Confirm the installed transmission before using service information or parts references.
- What PTO does the 784 use?The International Harvester 784 is listed with an independent rear PTO, a hydraulic wet-disc PTO clutch, and 540/1000 PTO speeds. Confirm the actual shaft and equipment before matching an implement.
- Is there a Nebraska test for the International 784?Yes. Nebraska Test 1315 is for an International 784 row-crop diesel with an 8-speed transmission, dated May 24, 1979. It should be read as a record for that tested configuration rather than every 784.
- Where is the 784 serial number?The serial-number plate is listed on the right side of the frame, above the front axle. Use the complete tag together with the installed equipment when selecting literature or parts.
- Which manuals are useful for an International 784?The sources below include a 124-page diesel operator-manual listing, a 576-page chassis-diesel service-manual listing for 1977-1984, and a 266-page parts manual. Match the tractor configuration before using any of them.
Engine and Power
The 784 is listed with a 246 cu in (4.0 L) diesel at 2,400 rpm. Nebraska Test 1315 is a separate row-crop diesel 8-speed test record, so do not turn it into a blanket result for every 784 configuration.
Diesel engine
| Displacement | 246 ci 4.0 L |
|---|---|
| Rated Rpm | 2400 |
| Engine Oil Capacity | 8.8 qts 8.3 L |
| Coolant Capacity | 14.4 qts 13.6 L |
Manufacture years
Transmission
Published 784 records show both 8F/4R syncromesh and 16F/8R two-speed power-shift arrangements. Determine the fitted transmission before using a capacity, repair procedure, or parts listing.
8-speed syncromesh
| Type | syncromesh |
|---|---|
| Gears | 8 forward and 4 reverse |
| Clutch | dry disc |
Torque Amplifier
| Name | Torque Amplifier |
|---|---|
| Type | two-speed power shift |
| Gears | 16 forward and 8 reverse |
PTO and Hitch
The 784 is listed with an independent rear PTO, hydraulic wet-disc PTO clutch, and 540/1000-rpm PTO speeds. Verify the actual PTO equipment before implement setup or diagnosis.
Rear PTO
Rear PTO type
Rear hitch
Rear lift
Hydraulics
Published data lists open-center hydraulics, one or two valves, 13 gpm (49.2 L/min) pump flow, and a 9 gal (34.1 L) hydraulic-system capacity. The installed valve and drive configuration still need to be checked on the tractor.
Type
Capacity
Pump flow
Valves
Fluids, Battery, and Service Facts
Published capacities include 20 gal (75.7 L) of fuel, 8.8 qt (8.3 L) of engine oil, and 14.4 qt (13.6 L) of coolant. Use a matching operator or service manual for grades, intervals, and fill procedures.
Fuel tank
Hydraulic system
Tires and Dimensions
Tire and dimension values can vary by wheel, axle, and configuration.
Weight
Serial Number Lookup
Serial rows are shown where documented.
location
Manuals, Parts, and Nebraska Test
Nebraska Test 1315 is an official record for the International 784 row-crop diesel 8-speed test tractor. The commercial manual listings below provide operator, chassis-service, and parts research routes, but their stated coverage still needs to match the tractor in front of you.
The published serial-number location is on the right frame above the front axle. Record the full tag, transmission, PTO, and drive arrangement before using a procedure or ordering a part.
Tractor test report
- Nebraska Test 1315: International 784 Row Crop Diesel 8-Speedtested performance
Official May 1979 record for the tested row-crop diesel 8-speed configuration.
Open Test 1315 record
Operator manual
- International Harvester 784 operator manualoperation, maintenance, and specifications
Commercial 124-page diesel operator-manual listing stated for 1977-1984. Confirm the tractor before use.
View operator manual
Service manual
- International Harvester 784 service manualoperation, maintenance, and specifications
Commercial 576-page chassis-diesel service-manual listing. Match configuration before use.
View service manual
Parts catalog
- International Harvester 784 parts manualparts matching
Commercial 266-page parts-manual listing. Verify serial number and configuration before ordering.
View parts manual
Parts Checks Before Ordering
Use the serial tag first, then confirm the utility, row-crop, low-profile, or four-wheel-drive arrangement, the installed transmission, PTO, and hydraulic valves. These differences can change the correct parts and literature match.
The parts catalog is useful for identifying assemblies, but it is not proof of fitment for every 784. Verify the model tag and installed configuration before ordering.
- International Harvester 784 parts manualCommercial 266-page parts-manual listing for the International Harvester 784. Verify serial number and configuration before ordering.View parts manual
Accuracy Note
Tractor specifications can vary by year, region, factory configuration, installed equipment, and later repairs. Match serial range, engine, transmission, PTO setup, and model code before ordering parts or doing service work.