David Brown 990 Implematic: Fuel & Specs

Understanding the David Brown 990 Implematic: Fuel, Features, and Fascinating History

The David Brown 990 Implematic is a name that resonates with many in the agricultural and vintage tractor community. Known for its robust build and reliable performance, this tractor has seen service across various terrains and applications. For those looking to maintain, restore, or simply understand this classic piece of machinery, understanding its specifications, particularly its fuel capacity, is crucial. Beyond the practicalities, the David Brown 990 Implematic also boasts a rich history, intertwined with significant developments in automotive and industrial sectors.

Fuel Capacity: Keeping the Engine Running

When it comes to operating any agricultural machinery, knowing its fuel capacity is fundamental. The David Brown 990 Implematic is equipped with a fuel tank that holds 52.0 litres. This translates to approximately 13.7 US gallons or 11.4 Imperial gallons. This capacity provides a good operational range, allowing farmers and operators to undertake significant work before needing to refuel. Regular checks and maintaining the fuel system are vital for optimal performance, especially for a tractor of this era. Ensuring the fuel is clean and free from contaminants will also contribute to the longevity of the engine and fuel delivery systems.

Key Features and Operational Aspects

The David Brown 990 Implematic was designed with practicality and efficiency in mind. It came equipped with several key features that defined its operational capabilities:

• Steering: It offered manual steering as standard, with an optional hydrostatic power steering system available for easier manoeuvrability, particularly during demanding tasks or when operating in tight spaces.
• Brakes: The braking system featured differential mechanical expanding shoe brakes, a common and reliable setup for tractors of its time, providing dependable stopping power.
• Operator Station: The 990 Implematic typically featured an open operator station, offering good visibility and accessibility for the driver.

A Special 1964 Model: The H990/UA

One particularly interesting variant of the David Brown 990 Implematic is the 1964 model with the designation H990/UA. This tractor carries a unique story, marked by its special configuration for the American market and a distinctive colour scheme. According to tractor expert RG Martin, the "U" in the model number signifies its specialisation for the American market. This particular tractor featured "990 Selectamatic tin on a 990 Implematic tractor."

This modification was linked to an import deal with Bolens for the American market. To align with the aesthetics of Bolens tractors, these David Browns were repainted to match. The "A" in the model number indicated it was an agricultural variant. This blend of Implematic mechanics with Selectamatic styling and a unique paint job makes this 1964 model a rather unusual and collectible tractor, especially in the United States where David Brown faced strong competition from more established brands like CASE.

Implematic vs. Selectamatic: A Drivetrain Distinction

It's worth noting the difference in transmissions between the Implematic and Selectamatic versions. The Implematic featured a 6-speed gearbox with a Hi-Lo range, offering an additional two speeds in reverse. In contrast, the Selectamatic system provided a more advanced 12-speed transmission across four ranges (low slow, low, high slow, high). The Selectamatic was also notable for its ability to upshift between gears (1st to 2nd, 2nd to 3rd, and even 2nd to 3rd within a range) and downshift (3rd to 2nd) without requiring the tractor to stop, offering greater operational flexibility.

Engine Lubrication: Keeping the Heart of the Tractor Healthy

Proper lubrication is paramount for the longevity and performance of any tractor engine. For the David Brown 990, a high-quality diesel lubricant is recommended. Specifically, a 15W/40 viscosity grade is often cited. It's advisable to use a branded product rather than a generic, mass-market oil. The engine sump typically has a single drain plug located underneath. When performing an oil change, it's essential to have a sufficiently large drain pan, as the quantity of oil can be substantial and a standard car oil drain pan may not be adequate.

Wheel Rim Information and Parts Availability

For owners and restorers, finding the correct parts is often a key challenge. While specific wheel rim dimensions aren't detailed here, resources like David Brown parts lookup services are invaluable. Websites such as farmingparts.com offer a selection tool to help you find genuine AGCO parts and a wide variety of aftermarket components for your 990 Implematic. If you're struggling to locate a specific part, reaching out to these suppliers with your tractor's model and serial number (or VIN) can help them assist you more efficiently. They can often source vintage or hard-to-find components.

The David Brown Legacy: Beyond Tractors

The David Brown story extends beyond agricultural machinery into the realm of luxury and performance automobiles. In a fascinating turn of events in 1947, David Brown acquired Aston Martin for £20,500 after seeing a classified advertisement. This was followed by the acquisition of Lagonda in 1948 for £52,500 and the coachbuilder Tickford in 1955. David Brown consolidated Aston Martin's manufacturing at the Tickford premises in Newport Pagnell. The David Brown era is celebrated for the production of the iconic DB series of Aston Martins, famously featured in James Bond films. This connection highlights the engineering prowess and diverse interests of the David Brown company. In 1972, facing financial difficulties, Aston Martin was sold to Company Developments Limited for a nominal £100, marking the end of an era for the marque under David Brown's ownership.

Contacting David Brown Parts Specialists

For those who prefer direct interaction or require assistance with parts orders and inquiries, contacting specialist suppliers is the way to go. For David Brown parts, you can reach out by phone. A contact number often provided is +44 (0)1989562743. This direct line ensures you can speak with knowledgeable staff who can help identify and source the correct components for your David Brown 990 Implematic.

Frequently Asked Questions

Q1: What is the fuel tank capacity of a David Brown 990 Implematic?
The David Brown 990 Implematic has a fuel tank capacity of 52.0 litres (13.7 US gal.; 11.4 Imp. gal).

Q2: What type of oil should I use for the David Brown 990 engine?
It is recommended to use a high-quality diesel lubricant, typically a 15W/40 viscosity grade. Opt for a branded product for better assurance of quality.

Q3: How can I find specific parts for my David Brown 990 Implematic?
You can use online parts lookup tools on specialist websites or contact suppliers directly, providing your tractor's model and serial number for assistance.

Q4: What made the 1964 David Brown 990 H990/UA special?
This model was specially configured for the American market, featuring Selectamatic styling and a paint scheme to match Bolens tractors due to an import deal.

Q5: Does David Brown have any connection to Aston Martin?
Yes, David Brown acquired Aston Martin in 1947 and oversaw the production of the legendary DB series sports cars.

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