| Manufacturer | International Harvester |
| Price | 3,038(USD) |
| Model | B-634 |
| Equipment Type | Agricultural Crawler Tractors |
| Factory | Doncaster, England |
INTERNATIONAL HARVESTER B-634 POWER
| Engine | 66hp / 49.2kW |
| PTO (claimed) | 59.3hp / 44.2kW |
ENGINE DETAIL
The International Harvester B-634 tractor features a robust BD-281 diesel engine with a displacement of 4.6L, producing 66hp at 1600 RPM and a peak torque of 225 lb-ft at 1000 RPM, which allows for efficient low-end power delivery ideal for heavy tillage and hauling tasks. The 4.125 x 5.25-inch bore/stroke design promotes good engine longevity and balance but may limit higher RPM performance, making it less suitable for high-speed applications. Additionally, with a 12-volt starter system, the B-634 offers reliable starting under diverse weather conditions, although it may require frequent maintenance due to its vintage design.
| Description | International Harvester BD-281 diesel 4-cylinder liquid-cooled |
| Displacement | 281ci / 4.6L |
| Bore/Stroke | 4.125x5.25inches / 105x 133mm |
| Power | 66hp / 49.2kW |
| Rated RPM | 1600 |
| Torque | 225lb-ft / 305.1Nm |
| Torque RPM | 1000 |
| Starter volts | 12 |
INTERNATIONAL HARVESTER B-634 ENGINE
The International Harvester B-634 features a robust 4.6L 4-cylinder diesel engine, offering efficient power delivery suitable for various agricultural tasks. With a 20.4-gallon (77.2L) fuel tank, it provides extended operational range, making it ideal for long durations in the field without frequent refueling. However, potential challenges may include maintenance of the diesel system and the weight balance during high-load operations, which could impact maneuverability on uneven terrain.
| Description | International Harvester 4.6L 4-cyl diesel |
| Fuel tank | 20.4gal / 77.2L |
TRANSMISSION
The International Harvester B-634 features 8 forward gears and 2 reverse gears, providing versatility in speed and maneuverability for various agricultural tasks. Its 330mm dry disc clutch offers robust engagement and durability, ideal for handling heavy loads, though it may require more frequent adjustments under high-use conditions. This tractor is well-suited for small to medium-sized farming operations where flexibility in fieldwork and transport is essential.
| Gears | 8 forward and 2 reverse |
| Clutch | 330mm dry disc |
MECHANICAL
The International Harvester B-634 tractor features a robust 4x2 configuration with an optional four-wheel drive conversion by County, enhancing its traction for diverse terrain. It is equipped with manual steering for 2WD and power steering for 4WD, providing ease of maneuverability in challenging conditions, though the open operator station may expose drivers to the elements. The 8-speed transmission allows for a versatile range of speeds, benefiting tasks from towing to fieldwork, but the mechanical disc brakes may require frequent maintenance compared to hydraulic systems.
| Chassis | 4x2 2WD/4x4 4WD*Four-wheel drive conversion by County |
| 2WD Steering | manual |
| 4WD Steering | power |
| Brakes | mechanical disc |
| Cab | Open operator station. Cab optional |
| Transmission | 8-speed |
HYDRAULICS
| Pressure | 2500psi / 172.4bar |
| Pump flow | 10.4gpm / 39.4lpm |
| Steering flow | 4.8gpm / 18.2lpm |
| Steering press. | 1500psi / 103.4bar |
TRACTOR HITCH
| Rear Type | II |
| Control | position and draft control |
| Rear lift | 3360lbs / 1524kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540 (1.375) |
| Engine RPM | 540@1458 |
INTERNATIONAL HARVESTER B-634 TIRES
The International Harvester B-634 tractor offers flexibility in drivetrain configuration (2WD, 4WD, and AWD) which enhances traction based on terrain and load conditions. The different tire sizes across configurations indicate specialization: the 2WD version is suitable for standard agricultural tasks, while the 4WD and AWD setups provide improved stability and power for challenging conditions. However, one must consider that the AWD system may increase maintenance complexity and operational costs compared to 2WD or 4WD options.
| 2WD Standard tires (ag) | Front: 7.50-16. Rear: 11-38 |
| 4WD Standard tires (ag) | Front: 10-24. Rear: 12-38 |
| AWD Standard tires (ag) | Front: 14-30. Rear: 14-30 |
DIMENSIONS
| 2WD Wheelbase | 86.8inches / 220cm |
| 4WD Wheelbase | 86.8inches / 220cm |
| AWD Wheelbase | 75inches / 190cm |
| 2WD Length | 138inches / 350cm |
| 4WD Length | 139inches / 353cm |
| AWD Length | 150inches / 381cm |
| Width | 65.5inches / 166cm |
| Height (cab) | 96inches / 243cm |
| 2WD Front tread | 52 to 61inches / 132to 154cm |
| 4WD Front tread | 53 to 66inches / 134to 167cm |
| AWD Front tread | 60 to 80inches / 152to 203cm |
| 2WD Rear tread | 56 to 72inches / 142to 182cm |
| 4WD Rear tread | 56 to 72inches / 142to 182cm |
| AWD Rear tread | 60 to 80inches / 152to 203cm |
INTERNATIONAL HARVESTER B-634 WEIGHT
| 2WD Operating | 6546lbs / 2969kg |
| 4WD Operating | 7694lbs / 3489kg |
| AWD Operating | 9574lbs / 4342kg |
DIMENSIONS & TIRES
The International Harvester B-634 tractor features a consistent wheelbase across 2WD and 4WD configurations, enhancing stability and maneuverability during operation, with a slightly shorter wheelbase for AWD, potentially improving agility in tight spaces. Its weight range of 6,546 to 9,574 pounds provides versatility in handling various implements but may necessitate additional ballast for optimal performance in challenging terrains. The tire specifications indicate compatibility with various field conditions, but the narrower front tires may limit traction in soft or muddy soils.
| 2WD Wheelbase | 86.8inches / 220cm |
| 4WD Wheelbase | 86.8inches / 220cm |
| AWD Wheelbase | 75inches / 190cm |
| Weight | 6546 to 9574 pounds |
| Front tire | 7.50-16 |
| 2WD Rear tire | 11-38 |
ELECTRICAL
| Charging system | generator |
| Battery volts | 12 |
| Battery AH | 95 |