New Komatsu WA475 10 The Next Wheel Loader has arrived (big cars)

Komatsu has introduced the first of its next-generation, Dash-10 wheel loader models. The WA475-10 is an electronically controlled loader with an all-new hydraulic mechanical transmission that combines the benefits of a hydrostatic transmission with that of a planetary mechanical transmission.

Komatsu says the development of the WA475-10 is several years in the making and the process was guided by a desire to give customers across the board spec and power increases while also boosting fuel efficiency.

New Transmission Transforms Powertrain:

Despite the Dash-10 model number title and this machine’s added power, the WA475-10 is powered by the same Komatsu 6-cylinder engine that’s found in the WA470-8. This is also the same engine that powers the larger WA480-8.

However, in the WA475-10, Komatsu has tuned the engine to output 290 horsepower. According to Komatsu’s listed specs on their website, that’s 18 more more than the WA470-8 that came before it and just 9 less than the larger WA480-8.

But here’s the key to how Komatsu has managed more power and better performance out of this new machine while also dropping fuel consumption. While the WA470-8 and WA480-8 reach their peak horsepower at 2,000 rpm, the WA475-10 does it at just 1,600 rpm. And as you know, more power at lower engine speeds means better fuel efficiency.

Since Komatsu is using the same engine found in the WA470 and WA480 Dash-8 models, the difference with the WA475-10 is a new hydraulic mechanical transmission. This loader doesn’t have a torque converter. Essentially this transmission combines Komatsu’s hydrostatic transmission technology with that of a planetary transmission and uses a new travel speed control dial to allow operators to set speed.

Komatsu says the transmission divides engine power into two paths. Depending on the speed selected using the new control dial, hydrostatic control will be implemented when high torque is needed, or planetary control will be used in lighter situations to increase fuel efficiency.

“So we have a pump and motor coupled with a planetary transmission. What that does for us is it gives us 30 percent more fuel efficiency—production per fuel—and 17 percent less fuel consumption than its predecessor,” says Bruce Boebel, Komatsu’s senior product manager for wheeled products. “So when you’re doing some V-cycle, you’re doing high torque type work, it goes more to the hydrostatic side of the transmission. Let’s say you get up to speed, you’re doing some load-and-carry work. Then basically it shifts over to the mechanical. It’s very similar to kind of like a direct drive portion, so you get a lot of fuel savings.”

The end result of these gains is a 14-percent boost in productivity in the WA475-10 over the WA470-8.

Komatsu says that another benefit of this new hydraulic mechanic transmission is that it features dynamic braking. This optimized braking system allows you to use the travel speed control dial to assist in slowing down the machine without using the brake pedal. Komatsu says using dynamic braking through the dial can reduce brake wear for extended component life.

Another brake-saving feature on the 475-10 is the inclusion of an auto hill-holding feature. This allows the machine to hold its position firm on a slope, such as when stockpiling, even when you’re not depressing the brake pedal.



Beefed-up Hydraulics, New Bucket Available

The powertrain isn’t the only element of the 475-10 that Komatsu strengthened. The hydraulics on this machine have been beefed up too. The machine features larger boom cylinders that have made boom lift 20 percent stronger than what is found on the 470-8. Breakout force that has been increased by 8 percent.

Komatsu has also implemented a large bore bucket cylinder similar to what is found on the WA470-8 log loader.

Alongside the WA475-10, Komatsu has also introduced with a new bucket design that the company says drives deeper into a pile for easier filling. This 5.8-cubic-yard bucket features a longer jaw for easier loading and larger side curves for retaining material. The new floor shape and radius profile help roll material into the bucket for easier loading.

Another feature that has decreased fuel consumption also simplifies operation of the 475-10 and that’s Independent Work Equipment Control.

POWER CONTROL AND Z-BAR LINKAGE SYSTEM
Power control on the brand new model includes a complete innovation: hydraulic speed can be independently controlled directly from the accelerator pedal. It has never been easier for an operator to find the right balance between traction and lifting power. The optimized Z-bar linkage system provides much more lift force and a higher tonnes-per-hour production rate.

#Komatsu​ #WheelLoader​ #WA47510​


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