Komatsu D475A Bulldozers Overview and Features

The Komatsu D475A Bulldozer is a beast of a machine, designed to tackle even the toughest terrain with ease. It's a massive 120,000-pound behemoth.

The D475A boasts a powerful 1,200 horsepower engine, making quick work of even the most challenging jobs. This engine is the backbone of the machine, providing the raw power needed to get the job done.

With its impressive 18-foot blade, the D475A can move massive amounts of earth, making it a valuable asset on any construction site. Whether you're clearing land or building a new road, this bulldozer is up to the task.

The D475A's advanced hydraulic system allows for precise control and smooth operation, reducing operator fatigue and increasing productivity. This is a machine that's designed to work hard and work long.

For your interest: Bulldozer

The D475 Dozer is a force to be reckoned with, capable of taking on a wide range of tasks.

Its versatility is one of its standout features, earning it a reputation as a mining dozer that can adapt to various situations. Whether you need to clear land or tackle solid rock, the D475A is up to the challenge.

The Komatsu D475A is a powerhouse of a machine, and its key features are just as impressive. It boasts a net horsepower that gives it the muscle it needs to tackle tough jobs.

Its torque converter is designed to provide smooth and efficient power delivery, making it perfect for heavy-duty applications. You can rely on it to get the job done.

One of the standout features of the Komatsu D475A is its number of track rollers, which provides stability and traction on uneven terrain. This is especially useful in construction or mining environments where the ground can be rough.

Overall, the Komatsu D475A's key features make it a reliable and capable machine that's up to any task.

The Komatsu D475A's engine is a powerhouse, delivering an impressive 890 horsepower (hp) thanks to its Komatsu SAA12V140E-3 engine. This potent engine ensures the dozer can tackle a wide range of tasks with ease.

The engine is a 4-cycle, water-cooled, direct injection unit with a turbocharger and air-to-air aftercooler. It features 12 cylinders and a piston displacement of 1,860 in³. The engine is also equipped with a gear pump, force lubrication system, and a full-flow and bypass combined filter.

The engine's horsepower ratings vary depending on the speed of the radiator cooling fan, with gross horsepower ratings of 934 HP forward and 1,040 HP reverse. The net horsepower ratings are 890 HP forward and 968 HP reverse at the maximum speed of the radiator cooling fan.

The Komatsu D475A features a TORQFLOW transmission, which consists of a water-cooled, 3-element, 1-stage, 1-phase torque converter with lockup clutch and a planetary gear, multiple-disc clutch transmission. This transmission is hydraulically actuated and force-lubricated for optimum heat dissipation.

Here are the gear ratios for the TORQFLOW transmission:

The engine is the heart of any heavy machinery, and the Komatsu D475A is no exception. It's powered by a mighty Komatsu SAA12V140E-3 engine, delivering a whopping 890 horsepower.

This engine is a 4-cycle, water-cooled, direct injection powerhouse, with a turbocharged, air-to-air aftercooled design. It's got 12 cylinders, with a bore x stroke of 5.51" x 6.50", and a piston displacement of 1,860 in³.

The engine's horsepower is measured in different ways, but the SAE J1349 standard gives us a gross horsepower of 899 HP, while the DIN6270 standard gives us a net horsepower of 890 HP. That's a lot of power!

Here are the key specs of the Komatsu SAA12V140E-3 engine at a glance:

The engine is also equipped with a gear pump, force lubrication system, and a full-flow and bypass combined filter. It's a well-designed engine that's built to handle the demands of heavy machinery.

The Torqflow transmission is a key component of the Komatsu D475A's powertrain. It's a water-cooled transmission that helps keep the engine running smoothly.

The Torqflow transmission features a 3-element, 1-stage, 1-phase torque converter with a lockup clutch and a planetary gear, multiple-disc clutch transmission. This setup is hydraulically actuated and force-lubricated for optimal heat dissipation.

One of the safety features of the Torqflow transmission is the gearshift lock lever and neutral safety switch. This helps prevent accidental starts and ensures safe operation.

Here are the gear ratios for the Torqflow transmission:

The Torqflow transmission also features an automatic lockup torque converter. This helps optimize power transmission and enhance efficiency during operation, minimizing fuel consumption.

The coolant and lubricant capacity of your machine is a crucial aspect to consider, especially when it comes to maintenance and repairs. The fuel tank has a capacity of 507.2 US gal.

The engine requires a significant amount of coolant, with a capacity of 70 US gal. This is a substantial amount, and you'll want to make sure you have a reliable way to refill it.

The engine also needs lubricant, with a capacity of 31.7 US gal. This is a critical component, as it helps keep the engine running smoothly.

Other systems, like the torque converter, transmission, bevel gear, and steering system, also require a substantial amount of lubricant, with a capacity of 55.5 US gal. This is a significant amount, and you'll want to make sure you have enough to go around.

Here's a breakdown of the lubricant capacities for different systems:

It's worth noting that the capacity of the final drive is not specified, so you'll want to consult the manufacturer's documentation for more information.

The Komatsu D475A's undercarriage is designed for durability and stability, with a robust configuration featuring 3-5 track rollers on each side and 4-14 carrier rollers. This setup ensures excellent ground contact and traction, which is essential for a size dozer.

The undercarriage boasts an impressive ground contact area of 11,360 square inches, or 73290 square centimeters. This feature enhances stability, traction, and overall dozer performance in various terrains.

The D475A's K-Bogie Undercarriage System features front and rear single bogies, which increase the length of track on ground, improving machine stability and leveling performance. An oscillating idler and increased sprocket lead angle also improve riding comfort when traveling over rough terrain.

Here are the specifications for the undercarriage:

The steering system of the Komatsu D475A is also noteworthy, featuring a Palm Command Control System (PCCS) with a joystick-controlled steering system. The system includes wet multiple-disc steering clutches that are spring-loaded and hydraulically released, as well as pedal/lever controlled steering brakes that are spring-actuated and hydraulically released, requiring no adjustment.

The undercarriage of a dozer is its foundation, and it plays a crucial role in its overall performance. A robust undercarriage is essential for stability, traction, and durability.

The suspension system is designed to handle the rigors of heavy-duty operation, featuring an oscillating equalizer bar and pivot shaft. This setup helps to cushion the impact of rough terrain and minimize vibration.

Lubricated track rollers are a key component of the undercarriage, providing extended service life and reducing maintenance needs. The rollers are resiliently mounted to the track frame with a bogie suspension system, which helps to absorb shock and improve riding comfort.

The track roller frame is constructed from high-tensile-strength steel, ensuring its strength and durability. The frame's cylindrical design helps to distribute the load evenly, reducing stress on individual components.

The Extreme Service Track Shoes feature lubricated tracks with unique seals that prevent foreign abrasives from entering the pin-to-bushing clearances. This design provides extended service life and makes maintenance easier.

Here are some key specifications of the undercarriage:

The K-Bogie Undercarriage System is designed to improve machine stability and leveling performance by increasing the length of track on ground. This system features front and rear single bogies, an oscillating idler, and increased sprocket lead angle, all of which work together to provide a smoother ride over rough terrain.

The undercarriage of a dozer is not just about the track rollers and carrier rollers, but also about the overall design and configuration. A robust configuration with multiple track rollers and carrier rollers is essential for excellent ground contact and traction.

The steering system on these machines is designed for ease and responsiveness. It features a Palm Command Control System (PCCS) with joystick control.

The steering clutches are spring-loaded and hydraulically released, providing smooth and reliable operation. They're also wet multiple-disc, which helps to reduce wear and tear.

Minimum turning radius is 15 ft. 1 in, making these machines perfect for tight spaces. This is especially useful in urban or confined areas.

The steering brakes are also spring-actuated and hydraulically released, requiring no adjustment. This means you can focus on the task at hand without worrying about tweaking the brakes.

The steering system is interconnected, allowing for easy and responsive steering. This is achieved through the use of wet multiple-disc steering clutches and brakes.

Here's a breakdown of the key features of the steering system:

The advanced ECMV (Electronic Control and Monitoring Valve) system also plays a role in the steering system, automatically controlling steering clutches and brakes depending on the incline of the machine or degree of load. This helps to reduce counter-steering and produce smooth dozing operation.