| Manufacturer |
International Harvester |
| Price |
6,100(USD) |
| Model |
706 |
| Equipment Type |
Standard-Tread Tractors |
| Factory |
|
ENGINES OVERVIEW
The International Harvester 706 tractor offers diverse engine options, including 4.6L and 5.1L diesel variants, alongside 4.3L and 4.8L gasoline engines, providing versatility for various agricultural needs. The diesel options deliver higher torque and fuel efficiency, making them ideal for heavy-duty tasks, while the gasoline engines may be more suitable for lighter operations due to lower operational costs and simpler maintenance. However, potential challenges include the availability of parts for older models and variations in performance based on the chosen fuel type, affecting operational decisions based on specific farming scenarios.
| Description |
International Harvester 4.6L 6-cyl diesel International Harvester 5.1L 6-cyl diesel International Harvester 4.3L 6-cyl gasoline Interntional Harvester 4.8L 6-cyl gasoline |
ENGINE DETAIL 1
The International Harvester 706 tractor is powered by the D282 diesel engine, featuring 282 cubic inches (4.6L) of displacement, which offers robust torque characteristics for heavy-duty applications. Its inline six-cylinder configuration, coupled with a rated RPM of 2300, ensures good power delivery at moderate engine speeds. The valve clearances are consistent at 0.027 inches, simplifying maintenance routines but may require adjustments in the long term to maintain optimal performance.
| Description |
International Harvester D282 diesel 6-cylinder liquid-cooled The 282 was the original diesel available for the 706. It was later replaced by the German-built 310 diesel |
| Displacemen |
282ci / 4.6L |
| Bore/Strok |
3.6875x4.3906inches / 94x 112 mm |
| Rated RP |
2300 |
| Firing orde |
1-5-3-6-2-4 |
| Coolant capacit |
21.5qts / 20.3L |
| Intake valve clearanc |
0.027 inches (hot)/0.686 mm |
| Exhaust valve clearanc |
0.027 inches (hot)/0.686 mm |
ENGINE OIL 1
The International Harvester 706 has an oil capacity of 9 quarts (8.5 liters), which is optimal for efficient lubrication and cooling under normal operating conditions. The advantage of this capacity is that it allows for extended oil change intervals, reducing maintenance frequency. However, be cautious of oil quality; insufficient or degraded oil could lead to accelerated wear of engine components.
ENGINE DETAIL 2
The International Harvester 706 features a 5.1L D310 diesel engine, providing robust torque for heavy-duty applications, ideal for farming tasks. With a bore-stroke ratio of 3.875x4.375 inches, it offers a balanced performance, although its 2300 RPM rating may limit high-speed field operations. Be aware that maintaining fuel efficiency may be challenging, especially if operating continuously at higher RPMs, leading to increased wear over time.
| Description |
International Harvester D310 diesel 6-cylinder liquid-cooled The 310 replaced the 282 diesel in November 1966, serial number 37237 |
| Displacemen |
310ci / 5.1L |
| Bore/Strok |
3.875x4.375inches / 98x 111 mm |
| Rated RP |
2300 |
ENGINE DETAIL 3
The International Harvester 706 is powered by a robust C263 gasoline 6-cylinder engine, featuring a displacement of 263ci (4.3L) which provides a balanced power-to-weight ratio at a rated RPM of 2300, suitable for various agricultural tasks. The availability of LP gas as a fuel option offers flexibility, potentially enhancing fuel efficiency, though it may require engine modification for optimal performance. Key maintenance considerations include regular checks on valve clearances and spark plug gaps, especially at the specified tolerances, to ensure reliable operation.
| Description |
International Harvester C263 gasoline 6-cylinder liquid-cooled The 263 was also available as an LP gas engine |
| Displacemen |
263ci / 4.3L |
| Bore/Strok |
3.5625x4.3906inches / 90x 112 mm |
| Rated RP |
2300 |
| Coolant capacit |
20.5 qts (gas)/19.4 L/21 qts (LP gas)/19.9 L |
| Sparkplug ga |
0.023 inches (gas)/0.584 mm/0.015 inches (LP)/0.381 mm |
| Point ga |
0.020inches / 0.508 mm |
| Intake valve clearanc |
0.027 inches (hot)/0.686 mm |
| Exhaust valve clearanc |
0.027 inches (hot)/0.686 mm |
ENGINE OIL 2
The International Harvester 706 has an oil capacity of 9 quarts (8.5 liters), which is relatively typical for tractors of its era, allowing for adequate lubrication in various operating conditions. Ensuring the correct oil level is critical to maintain engine performance and longevity, as insufficient oil can lead to increased wear and potential engine failure. Regularly monitoring and changing the oil can help address the challenges of wear and contamination over time, ultimately enhancing the tractor's reliability and efficiency.
ENGINE DETAIL 4
The International Harvester 706 tractor, equipped with a C291 gasoline 6-cylinder engine, offers a displacement of 291 ci (4.8L) and operates at a rated RPM of 2300, making it suitable for moderate power applications. Its 7.5:1 compression ratio indicates lower thermal efficiency compared to higher compression engines, which may limit power output and fuel efficiency. The dual-fuel option as an LP gas variant serves as an advantage for operability in various environments, leveraging cleaner emissions while potentially incurring higher initial conversion costs.
| Description |
Interntional Harvester C291 gasoline 6-cylinder liquid-cooled The 291 was also available as an LP gas engine |
| Displacemen |
291ci / 4.8L |
| Bore/Strok |
3.75x4.39inches / 95x 112 mm |
| Compressio |
7.5:1 |
| Rated RP |
2300 |
INTERNATIONAL HARVESTER 706 ENGINES
The International Harvester 706 tractor offers a range of engine options, including the 4.6L and 5.1L diesel, along with 4.3L and 4.8L gasoline variants, providing flexibility in fuel choice according to operational needs. Key advantages of the diesel engines include improved torque and fuel efficiency, making them ideal for heavy-duty tasks, whereas the gasoline versions may be easier to maintain and start in colder weather. However, the diesel engines typically have higher initial costs and might require more extensive cooling and lubrication systems, presenting challenges in maintenance compared to gasoline counterparts.
| Description |
International Harvester 4.6L 6-cyl diesel International Harvester 5.1L 6-cyl diesel International Harvester 4.3L 6-cyl gasoline Interntional Harvester 4.8L 6-cyl gasoline |
TRANSMISSIONS OVERVIEW
The International Harvester 706 features an 8-speed transmission that can be upgraded to a 16-speed, enhancing operational flexibility and efficiency in various field conditions. The increased number of gears allows for precise speed adjustments, making it ideal for tasks requiring meticulous control, such as plowing and planting in varying soil types. However, the complexity of a 16-speed system may present challenges in maintenance and operator training compared to simpler transmission options.
| Description |
8-speed/16-speed |
TRANSMISSION 1
The International Harvester 706 features a sliding gear transmission, providing 8 forward and 4 reverse speeds. This design encourages precise control but requires the tractor to be stopped and the clutch engaged for gear changes, which could slow operation during fieldwork. With an oil capacity of 68 quarts (64.4L) using IH Hy-Tran, maintenance of hydraulic performance is critical to avoid system failures.
| Transmissio |
sliding gear |
| Gear |
8 forward and 4 reverse |
| Clutc |
12-inch dry disc |
| Oil capacit |
68qts / 64.4L/IH Hy-Tran |
| Description |
The 706 transmission is controlled by means of two levers. A range lever selects high, low, reverse range, or neutral. A separate speed lever selects one of four speeds. The tractor must be stopped, and the clutch used, to change range or speed gears. |
SPEEDS 1
| Description |
With 18.4-30 rear tires |
TRANSMISSION 2
The International Harvester 706 tractor features a pioneering Torque Amplifier (TA) which allows for on-the-move shifting between under-drive and direct drive without clutching, enhancing productivity during field operations. With 16 forward and 8 reverse gears coupled with a 12-inch dry disc clutch, it offers versatility in varying agricultural tasks while the 68 qt oil capacity supports smooth hydraulic operations, critical for optimal performance. However, operators must be adept in managing the TA lever to avoid abrupt changes that could affect traction or load handling during operation.
| Transmissio |
Torque Amplifier |
| Gear |
16 forward and 8 reverse |
| Clutc |
12-inch dry disc |
| Oil capacit |
68qts / 64.4L/IH Hy-Tran |
| Description |
The Torque Amplifier (TA) provides a hydraulically-actuted under-drive that may be shifted, on the move, with any range and speed selection in the main transmission. Using the TA does not require the clutch or stopping the tractor. With the lever in the forward position, the TA is disengaged and the transmission is in direct drive. To slow the tractor (increasing pulling power) the TA lever should be pulled smoothly and quickly to the rear, engaging the TA. To disengage the TA and return to direct-drive, the TA should be moved forward, with a slight pause at the center position of the lever. |
SPEEDS 2
| Description |
With 18.4-30 rear tires |
INTERNATIONAL HARVESTER 706 TRANSMISSIONS
The International Harvester 706 features an 8-speed or optional 16-speed transmission, allowing for versatile power management and adaptability across various terrains. This transmission system enhances operational efficiency by providing a broad range of speed settings, which is beneficial in both fieldwork and transport scenarios. However, operators should consider the learning curve associated with mastering the gear shifting for optimal performance, especially in demanding agricultural applications.
| Description |
8-speed/16-speed |
MECHANICAL
The International Harvester 706 offers versatile driveline options with 2WD and optional 4WD configurations, enhancing traction and stability for varied terrain. Its power steering and hydraulic disc brakes improve maneuverability and safety, making it suitable for both farm and commercial applications. The optional cab with A/C (available from 1966) provides operator comfort, an advantage in prolonged work hours, especially in hot climates.
| Driv |
4x2 2WD/4x4 MFWD 4WD (optional) |
| Description |
Power steering Hydraulic disc brakes Cab optional, A/C available starting in 1966 |
CAPACITY
| Fue |
33 gal (gas/diesel)/124.9 L/39 gal (LP gas)/147.6 L |
| Hydraulic syste |
17gal / 64.3L |
HYDRAULICS
| Typ |
open center |
| Capacit |
17gal / 64.3L |
| Valve |
1 or 2 |
| Pump flo |
12gpm / 45.4lpm/17 gpm (optional)/64.3 lpm |
| Total flo |
24gpm / 90.8lpm |
| Steering flo |
9 gpm/34.1 lpm |
TRACTOR HITCH
| Rear Typ |
II/I |
| Contro |
torsion bar (optional) |
| Typ |
IH Fast Hitch |
POWER TAKE-OFF (PTO)
| Rear PT |
independent |
| Rear RP |
540/1000 |
INTERNATIONAL HARVESTER 706 TIRES
The International Harvester 706 tractor features a 2WD/4WD configuration with 7.50-18 front tires for enhanced maneuverability in 2WD and 11.2-24 in 4WD for better traction in challenging conditions. The rear 18.4-30 tires provide ample ground contact and stability, ideal for various agricultural applications such as plowing and cultivating. While the 2WD option offers lower maintenance and cost, the 4WD variant significantly improves performance on uneven terrain, making it advantageous for diverse farming scenarios.
| Ag fron |
7.50-18 (2WD)/11.2-24 (4WD) |
| Ag rea |
18.4-30 |
DIMENSIONS & TIRES
The International Harvester 706 tractor features an 87.5-inch wheelbase for 2WD and 87 inches for 4WD, providing stable handling and maneuverability across varied terrains. Weighing between 8,100 to 9,160 pounds, it balances substantial durability with effective ground engagement, essential for field operations. Its tire specifications (7.50-18 front and 18.4-30 rear) allow for optimal traction and weight distribution, although potential challenges may arise in muddy conditions where wider tires could enhance flotation.
| Wheelbas |
87.5 inches (2WD)/222 cm/87 inches (4WD)/220 cm |
| Weigh |
8100 to 9160 pounds |
| Front tir |
7.50-18 |
| Rear tir |
18.4-30 |
706 SERIAL NUMBERS
706 SERIAL LOCATION
| Description |
Tractor's clutch housing on left side |
BELT PULLEY
| Diamete |
11inches / 27cm |
| Widt |
7.5inches / 19cm |
| RP |
1055 |
| Spee |
3,038ft/min / 925.98 meters/min |
ELECTRICAL
| Groun |
negative |
| Charging amp |
25 (generator)/32 (alternator) |
| Batterie |
1 (gas)/2 (diesel) |
| Battery volt |
12 (gas)/6 (diesel) |
