Ford 6600: A Deep Dive

Unveiling the Ford 6600: A Classic Workhorse

The Ford 6600 tractor stands as a testament to enduring engineering and practical design in the agricultural machinery sector. Manufactured by Ford between 1975 and 1984, this versatile machine succeeded the well-regarded Ford 5000 and paved the way for the subsequent 6610 model. Initially available in both utility and row-crop configurations, the row-crop variant was rebranded as the Ford 6700 from 1977 onwards. The Ford 6600 was a popular choice for farmers, known for its reliability and ease of operation, making it a sought-after tractor even decades after its production ceased. This article delves into the comprehensive specifications, historical context, and operational capabilities of the Ford 6600, providing a detailed overview for enthusiasts and owners alike.

Engine Specifications: Power and Versatility

At the heart of the Ford 6600 lies a choice of robust engines, designed to meet the diverse demands of agricultural work. The tractor was originally equipped with a 4.2-litre, four-cylinder engine, offered in both diesel and gasoline variants. While the gasoline option was phased out in 1979, the diesel engine continued to be the mainstay. Both engine types featured liquid cooling, a bore and stroke of 112 by 107 mm, and a rated speed of 2,100 RPM. The diesel variant boasted a 16.3:1 compression ratio, a significant advantage for fuel efficiency and power delivery, compared to the gasoline engine's 7.75:1 ratio. The diesel engine also offered an impressive 200 lb-ft of torque at 1,400 RPM, ensuring ample pulling power for demanding tasks.

A notable upgrade arrived in 1981 with the introduction of the 'Blue Power Special' engine. This enhanced diesel engine maintained the four-cylinder, liquid-cooled configuration but increased the displacement to 4.4 litres. With a bore and stroke measuring 112 by 112 mm, it was rated for 2,100 RPM. Regardless of the specific engine variant, the Ford 6600 consistently delivered a net horsepower of 72.5 hp, with fuel capacities ranging from a standard 76 litres to an optional 125 litres, catering to longer working days.

Engine Variants at a Glance:

Transmission and Drivetrain: Smooth Power Transfer

The Ford 6600 offered flexibility in its transmission options, catering to different operational needs. Buyers could choose between an eight-speed gear transmission and a more advanced two-speed power shift transmission. The standard eight-speed gearbox provided eight forward and two reverse gears, coupled with a robust 304-mm dry disc clutch for reliable engagement. For those requiring enhanced operational efficiency and gear changes on the move, the two-speed power shift transmission was the superior choice. This option significantly expanded the gear selection, offering 16 forward and four reverse gears, allowing for more precise speed control and optimised power delivery across a wider range of tasks.

The tractor's drivetrain was equally capable. It featured an independent rear PTO (Power Take-Off) operating at 540 RPM, a standard for many agricultural implements. For traction and stability, the Ford 6600 was available in either a 4x2 two-wheel-drive configuration or a more capable 4x4 mechanical four-wheel-drive (MFWD) setup. This MFWD option provided enhanced grip and reduced soil compaction, particularly beneficial in challenging field conditions. The inclusion of inboard planetary final drives and a mechanical rear differential lock further bolstered its off-road and heavy-duty capabilities, ensuring consistent power to the wheels.

Hydraulics and Hitch: Lifting and Control

The hydraulic system of the Ford 6600 was designed for efficient operation of mounted implements and external hydraulic functions. It featured one or two hydraulic valves, allowing for the control of various attachments. The pump provided a flow rate of 36.7 litres per minute at a pressure of 2,100 psi, which was ample for most farming operations of the era. This system was crucial for the tractor's top-link draft sensing control, a sophisticated mechanism that automatically adjusted the implement's depth in the soil based on the resistance encountered. This feature ensured consistent working depths for ploughs and cultivators, improving work quality and reducing operator fatigue.

The tractor's three-point hitch, a Category II, was capable of lifting a substantial 1,832 kg (4,040 lbs) at the ends of its lift arms. This lifting capacity made it suitable for a wide array of implements, from small ploughs to larger tillage equipment. The combination of a capable hydraulic system and a strong three-point hitch made the Ford 6600 a versatile and productive tractor on farms of various sizes.

Operator Comfort and Features

Ford understood the importance of operator comfort and productivity. The standard Ford 6600 featured an open operator station, providing good visibility and ventilation. However, for those working in more demanding weather conditions or requiring enhanced comfort, an optional cab was available. This optional cab often came equipped with essential amenities such as a heater and, in some cases, air conditioning, transforming the working experience during long hours in the field. The inclusion of power steering further reduced operator effort, making manoeuvring the tractor significantly easier, especially when working in confined spaces or during repetitive tasks.

Braking was handled by differential mechanical wet disc brakes, a reliable and durable system known for its performance in dusty and wet conditions. The mechanical rear differential lock provided an additional layer of traction when needed, allowing the operator to engage it for maximum grip on slippery surfaces.

Dimensions and Weight: A Practical Footprint

The physical dimensions and weight of the Ford 6600 were well-balanced for its intended use. The tractor measured 389 cm in length and 185 cm in width, providing a stable and manageable profile. The height from the ground to the hood was 173 cm, ensuring good forward visibility. With an optional cab, the overall height could reach up to 270 cm. The operating weight varied depending on the configuration, with the open station model weighing approximately 2,667 kg and the cab-equipped version tipping the scales at 3,184 kg. These figures highlight a tractor that was substantial enough for serious work but still relatively easy to transport and manoeuvre.

The wheelbase measured 223 cm, contributing to its stability. Front axle clearance was 45 cm, offering protection from ground obstacles. The front tread could be adjusted between 133 to 204 cm, while the rear tread offered a broader range, from 132 to 203 cm, extendable to 167 to 228 cm with power adjust options. These adjustable treads allowed the tractor to be configured for different row spacings and field conditions, adding to its overall utility.

Key Dimensions and Weights:

Legacy and Availability

The Ford 6600 has carved out a significant place in agricultural history. Its reputation for being a strong, reliable, and easy-to-use tractor means it remains a viable option for many small to medium-sized farms, particularly those ranging from 10 to 50 acres. Its straightforward design and robust construction contribute to its longevity, with many examples still performing well after thousands of operating hours. For those looking to acquire a piece of this legacy, the used market is the primary avenue. Companies specialising in tractor parts and restoration, such as G.W. Tractors, often have a selection of used Ford 6600 models for sale or for wrecking, ensuring that parts and expertise are available to keep these classic machines running.

Frequently Asked Questions (FAQs)

Q1: How many cylinders does a Ford 6600 have?
The Ford 6600 is equipped with a four-cylinder engine, available in both diesel and gasoline variants during its production run, with a later diesel option increasing displacement.

Q2: What horsepower does the Ford 6600 produce?
The Ford 6600 typically produces 72.5 net horsepower, with PTO horsepower rated at 70 hp and drawbar horsepower at 58 hp.

Q3: What were the transmission options for the Ford 6600?
The Ford 6600 offered two main transmission options: an eight-speed gear transmission and a two-speed power shift transmission.

Q4: Was a four-wheel-drive option available for the Ford 6600?
Yes, the Ford 6600 was available in both 4x2 two-wheel drive and 4x4 mechanical four-wheel drive (MFWD) configurations.

Q5: What kind of hydraulic system does the Ford 6600 have?
The Ford 6600 features a hydraulic system with one or two valves, a pump flow of 36.7 litres per minute, and operates at 2,100 psi, including a top-link draft sensing control.

In conclusion, the Ford 6600 remains a highly respected and capable tractor. Its blend of power, versatility, and enduring build quality makes it a valuable asset for agricultural operations, a true testament to Ford's engineering prowess in the tractor industry.

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