| Manufacturer | Case |
| Price | 6,900(USD) |
| Model | 731 |
| Equipment Type | Row-Crop Tractors |
| Factory |
VARIANTS
| 732 | Western Special diesel |
| 733 | high-clearance diesel |
| 734 | orchard diesel |
| 740 | row-crop gas |
| 742 | Western Special gas |
| 743 | high-clearance gas |
| 744 | orchard gas |
NEBRASKA TRACTOR TEST 742 2
| Description | Diesel Case-O-Matic 2WD April 19 - May 6, 1960 Link: Nebraska Tractor Test 742 file PTO performance Drawbar performance Gear 4 used for power test. Gear 2-Torque used for pull test |
| Power at rated engine speed | 56.50hp / 42.1kW |
| Fuel use | 4.2gal/hour / 15.9l/hour |
| Power at rated PTO speed | 53.46hp / 39.9kW |
| Max power | 48.31hp / 36.0kW |
| Max pull | 7362lbs / 3339kg |
NEBRASKA TRACTOR TEST 743 2
| Description | Diesel 8-speed 2WD April 21 - May 6, 1960 Link: Nebraska Tractor Test 743 file PTO performance Drawbar performance Gear 4 used for power test. Gear 2 used for pull test |
| Power at rated engine speed | 56.43hp / 42.1kW |
| Fuel use | 3.8gal/hour / 14.4l/hour |
| Max power | 48.33hp / 36.0kW |
| Max pull | 7531lbs / 3416kg |
J.I. CASE 731 POWER
| Plows | 5 |
| Drawbar (tested) | 48.33hp / 36.0kW |
| PTO (tested) | 56.50hp / 42.1kW |
ENGINE DETAIL
The Case 731 tractor, featuring a 4-cylinder diesel engine with a 267ci displacement, offers a robust power-to-weight ratio ideal for medium-duty agricultural tasks. Its 15.2:1 compression ratio enhances fuel efficiency while the oil bath air cleaner ensures optimal filtration in dusty conditions. However, the rated RPM range of 1700 to 1900 may limit its versatility in high-speed applications, making it best suited for low to mid-range operations.
| Description | J.I. Case diesel 4-cylinder liquid-cooled |
| Displacement | 267ci / 4.4L |
| Bore/Stroke | 4.125x5.00inches / 105x 127 mm |
| Air cleaner | oil bath |
| Compression | 15.2:1 |
| Rated RPM | 1700 (Dual-Range)/1900 (Case-o-Matic) |
| Starter volts | 12 |
| Coolant capacity | 7.5qts / 7.1L |
J.I. CASE 731 ENGINE
The Case 731 tractor is powered by a robust 4.4L 4-cylinder diesel engine, providing efficient torque and fuel economy, vital for agricultural applications. Its 22-gallon (83.3L) fuel tank allows for extended operation periods, reducing the need for frequent refueling during long working hours. However, operators should be aware of maintenance requirements for the engine and fuel system to ensure optimal performance and longevity.
| Description | J.I. Case 4.4L 4-cyl diesel |
| Fuel tank | 22gal / 83.3L |
TRANSMISSIONS OVERVIEW
The Case 731 tractor features an 8-speed torque converter that enables smooth power transfer and increased efficiency during operations, particularly in heavy load scenarios. While the 8-speed unsynchronized transmission provides flexibility in speed choices, it may require more operator skill for smooth gear engagement, especially when shifting under load. Operators should be aware that the combination of these transmission systems allows for adaptable performance in various agricultural tasks but may challenge inexperienced drivers with gear management.
| Description | 8-speed torque converter/8-speed unsynchronized |
TRANSMISSION 1
The Case 731 tractor features a Case-o-matic transmission system with a torque converter, providing smooth power delivery and enhanced maneuverability at low speeds. With 8 forward and 2 reverse gears, it allows for versatile operation, making it suitable for various agricultural tasks. However, the complexity of the torque converter system may lead to increased maintenance needs compared to simpler transmission types.
| Transmission | Case-o-matic |
| Type | torque converter |
| Gears | 8 forward and 2 reverse |
TRANSMISSION 2
The Case 731 tractor features an unsynchronized dual-range transmission, providing 8 forward and 2 reverse gears for versatile speed control, ideal for diverse agricultural operations. The mechanical dry disc clutch offers reliable engagement, though it may require careful operation to prevent wear during frequent shifting. Its transmission configuration is advantageous for tasks requiring precise power management, but operators must adapt to the lack of synchronization, especially in high-load scenarios.
| Transmission | Dual-Range |
| Type | unsynchronized |
| Gears | 8 forward and 2 reverse |
| Clutch | mechanical dry disc |
MECHANICAL
The Case 731 tractor features a 4x2 2WD chassis, which offers simplicity and reduced weight, ideal for flat terrains but limits traction on uneven surfaces. The availability of manual or optional power steering can enhance maneuverability, but the open operator station may expose the operator to environmental factors. The 8-speed torque converter transmission provides smoother power delivery and better control for variable tasks, while the 8-speed unsynchronized option may require more operator skill, particularly in demanding applications.
| Chassis | 4x2 2WD |
| Steering | manual/power optional |
| Brakes | differential disc |
| Cab | Open operator station. |
| Transmissions | 8-speed torque converter/8-speed unsynchronized |
HYDRAULICS
| Type | open center |
| Valves | 1 |
TRACTOR HITCH
| Rear Type | II |
| Type | Case Eagle Hitch |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/1000 |
J.I. CASE 731 TIRES
The Case 731 tractor features a smaller front tire size of 6.00-16, which provides agility and better maneuverability in tight spaces, while the larger rear tire size of 13.6-38 enhances traction and stability during heavy-duty applications. This configuration is advantageous for operations requiring both precision in steering and power transmission, such as row crop cultivation or loader work. However, the narrower front tires could limit flotation in wet conditions, posing a risk of sinking or bogging down.
| Ag front | 6.00-16 |
| Ag rear | 13.6-38 |
DIMENSIONS
| Wheelbase | 83inches / 210cm |
| Operating weight | 7,095lbs / 3218kg |
| Ballasted weight | 9,525lbs / 4320kg |
DIMENSIONS & TIRES
The Case 731 tractor features an 83-inch wheelbase, providing stability for both fieldwork and transportation tasks, which is beneficial in maintaining traction on various terrain types. At 7,095 lbs, its weight allows for effective force exertion for plowing and heavy towing, although it may challenge maneuverability in tight spaces. The front tire specification of 6.00-16 and rear tire size of 13.6-38 offer a balance between flotation and traction, but users may need to consider tire options for specific soil conditions to optimize performance.
| Wheelbase | 83inches / 210cm |
| Weight | 7,095lbs / 3218kg |
| Front tire | 6.00-16 |
| Rear tire | 13.6-38 |
731 SERIAL NUMBERS
| Location | Plate on instrument panel |
| 1960 | 8160001 |
| 1961 | 8168801 |
| 1962 | 8190001 |
| 1963 | 9208001 |
| 1964 | 8229001 |
| 1965 | 8253501 |
| 1966 | 8279001 |
| 1967 | 8306501 |
| 1968 | 8332101 |
| 1969 | 8356251 |