International Harvester 844-S Overview
The International Harvester 844-S is listed from 1975 through 1989 with a 268 cu in (4.4 L) diesel engine rated at 87 hp. Published transmission information shows more than one drivetrain, including Synchron and Agriomatic S entries, so a model name alone is not enough for a gear count, service figure, or parts match.
The page therefore keeps its transmission choices and literature references configuration-aware. The parts catalog for 844S tractors from chassis number 018 000 identifies a D-268 engine and specific axle families; check the serial tag and installed equipment before applying that coverage to an individual tractor.
Operator, service, and parts references are collected below as research routes. They help identify the right material, but they do not replace a complete manual matched to the tractor's serial number and configuration.
International Harvester 844-S Quick Answers
- What engine is in an International Harvester 844-S?The 844-S is listed with a 268 cu in (4.4 L) diesel engine rated at 87 hp (64.9 kW) and 2,300 rpm.
- Which transmissions were offered?Published 844-S records list Synchron and Agriomatic S transmissions, with 8F/4R, 12F/4R, and 16F/8R entries. Confirm the fitted transmission before using a gear count, capacity, procedure, or parts reference.
- What PTO does the 844-S use?The 844-S is listed with an independent rear PTO and 540/1000 PTO speeds. The published 540-rpm setting is 1,920 engine rpm; check the actual shaft and equipment before matching an implement.
- What hydraulic figures are listed?Published data lists 7.9 gpm (29.9 L/min) pump flow, one or two valves, and a 4 gal (15.1 L) hydraulic-system capacity. Installed remotes and equipment still need to be checked on the tractor.
- What is the 844-S fuel capacity?The published fuel capacity is 22.4 gal (84.8 L). Use a matching operator manual for fuel-system service, fluid grades, and maintenance intervals.
- Which manuals are useful for an 844-S?The sources below include an 844S operator-manual listing, a 1980 illustrated parts catalog covering 844S tractors from chassis number 018 000, and a multi-model transmission service-manual record. Match serial number and configuration before use.
Engine and Power
The 844-S is listed with a 268 cu in (4.4 L) diesel at 2,300 rpm. A 1980 parts-catalog listing for 844S tractors from chassis number 018 000 identifies a D-268 engine, so the serial tag is important before using engine literature or parts information.
Diesel engine
| Displacement | 268 ci 4.4 L |
|---|---|
| Power | 87 hp 64.9 kW |
| Rated Rpm | 2300 |
| Torque | 218.4 lb-ft 296.2 Nm |
| Torque Rpm | 1300 |
Manufacturer
Manufacture years
Transmission
The published data contains both Synchron and Agriomatic S entries, with more than one gear-count combination. Do not flatten those options into one universal 844-S transmission specification; identify the drivetrain first.
Synchron
| Name | Synchron |
|---|---|
| Type | gear |
| Gears | 8 forward and 4 reverse |
Agriomatic S
| Name | Agriomatic S |
|---|---|
| Type | partial power shift |
| Gears | 12 forward and 4 reverse |
PTO and Hitch
The 844-S is listed with an independent rear PTO and 540/1000-rpm PTO speeds. The listed 540-rpm setting is 1,920 engine rpm; final implement compatibility depends on the tractor's actual PTO equipment.
Rear PTO
Rear PTO type
Engine RPM
Rear hitch
Rear lift
Hydraulics
Published records list 7.9 gpm (29.9 L/min) pump flow, one or two valves, and a 4 gal (15.1 L) hydraulic-system capacity. Valve and remote equipment can vary, so verify the installed setup before diagnosis or parts work.
Capacity
Pump flow
Valves
Fluids, Battery, and Service Facts
The published fuel capacity is 22.4 gal (84.8 L). Use a complete, matching operator or service manual for fluid grades, fill steps, intervals, and adjustments instead of treating a listed capacity as a maintenance procedure.
Fuel tank
Hydraulic system
Tires and Dimensions
Tire and dimension values can vary by wheel, axle, and configuration.
Wheelbase
Weight
Manuals and Documents
The listed 844S operator manual is an 86-page commercial reproduction described as covering the diesel model. The linked 1977 International Harvester transmission service-manual record covers 554/644, 744/844, and 844S models. These are literature routes, not a substitute for a complete configuration-matched procedure.
For a later 844S parts-catalog scope, the 1980 illustrated catalog identifies coverage from chassis number 018 000 and names the D-268 engine. Keep that serial threshold attached to the catalog rather than assuming it covers every 844-S.
Operator manual
- International Harvester 844S operator manualoperation, maintenance, and specifications
Commercial 86-page operator-manual listing for the diesel 844S. Match serial number and equipment before use.
View operator manual
Service manual
- International Harvester 844-S transmission manual recordoperation, maintenance, and specifications
1977 bibliographic record for multi-model transmission service literature. Confirm exact drivetrain coverage before use.
Open manual record
Parts catalog
- IHC 844S parts catalog from chassis 018 000parts matching
1980 illustrated-parts-catalog listing with specific serial-range scope. Verify the tractor before ordering.
View parts catalog
Parts Checks Before Ordering
Record the chassis number, engine, installed transmission, PTO, hydraulic valves, axle configuration, and tire or wheel equipment before ordering. The 844-S has published transmission and equipment differences that can affect the correct literature and part selection.
The parts-catalog reference is valuable for identifying an assembly, but it is not proof of fitment on every 844-S. Confirm the serial-range coverage and the tractor's actual configuration before ordering.
- IHC 844S parts catalog from chassis 018 0001980 illustrated-parts-catalog listing with serial-range scope and model-specific component groups. Verify the tractor before treating a catalog entry as a fitment decision.View parts catalog
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.