Komatsu Targets Productivity, Operator Comfort With New WA480-8 Wheel Loader

August 1, 2018

Ryan Gehm

Komatsu’s new WA480-8 wheel loader runs a Tier 4 Final engine that burns up to 20 percent less fuel than its Tier 3 predecessor. NOx emissions also are reduced, by more than 80 percent. (Image: KOMATSU)

Komatsu America has added to its wheel loader family with the recent introduction of the new WA480-8, powered by a 299-hp (223-kW), 11.04-L, EPA Tier 4 Final certified, SAA6D125E-7 engine that burns up to 20 percent less fuel than its Tier 3 predecessor. Engineers focused on higher production with lower fuel costs, improved operator comfort and enhanced serviceability when developing the new loader.

Komatsu engine designers were able to reduce NOx emissions by more than 80 percent compared to the Tier 3 model, by engineering the Komatsu Diesel Particulate Filter (KDPF) and other aftertreatment components in conjunction with the engine. More than 95 percent of KDPF regeneration is performed passively, with no impact on the operator or machine operation.

An advanced joystick steering system eliminates the steering wheel — one cause of operator fatigue — and improves forward visibility. (Image: KOMATSU)

The company’s SmartLoader Logic, combined with the lockup torque converter that activates in 2nd, 3rd and 4th gear, is said to provide optimal engine torque for improved acceleration, hill-climbing ability, a higher top speed and fuel savings.

An Auto Idle Shutdown function reduces machine idle time — another fuel-saving feature incorporated in the new loader.

In-cab upgrades: joystick steering

An optional advanced joystick steering system (AJSS) tops the list of new operator-friendly design features in the WA480-8. Designed by Komatsu engineers, the AJSS eliminates “a major cause of operator fatigue,” the company stresses, by replacing the steering wheel in the cab. Another benefit is improved forward visibility.

Joystick steering is increasingly replacing traditional steering-wheel control in the off-highway industry, especially in wheel loaders. (Read more about this and other trends impacting the operator environment here .)

Operator comfort is also enhanced with an air-suspension, high-back heated seat with cast frame structure. Seat-mounted electronic pilot control levers include a F-N-R switch for ergonomics and convenience.

An integrated load meter system displays data directly to the machine’s main monitor and remotely via the latest version of the KOMTRAX telematics system and monitor. Load sub-total and cancel functions are available via buttons integrated into the machine work levers. Load meter is only available on two-lever, two-valve machine configurations. An optional printer allows operators to print bucket and truck weights based on load meter data.

KOMTRAX provides other key machine metrics, including KDPF status and DEF-level data, fuel consumption, and performance information collected and sorted by operator ID.

Other in-cab enhancements include an auxiliary jack and two 12-volt ports; a 7-inch, full-color, high-resolution monitor with Ecology Guidance; and a separate full-color rearview monitor that comes standard.

“Curvy” bucket aids productivity

The WA480-8 employs a new bucket design, with curves on the side wall and wrap to improve pile penetration and material retention in carry operations. (Image: KOMATSU)

Productivity is increased thanks to a new “generous curves” bucket design that retains material better, making the machine nearly 8 percent more productive than the previous model. While it’s not a bigger bucket, the design results in better fill factor and better carry, a Komatsu spokesperson told Truck & Off-Highway Engineering.

“The front edge (side edge) is curved for better carry. Back wrap is better designed so material flows and fills better as the bucket penetrates into a pile,” the spokesperson shared.

“The WA480-8 is the perfect tool for quarry, infrastructure and non-residential construction applications,” Craig McGinnis, product marketing manager, Komatsu America, said in the product release. “It’s the perfect three-pass loader for on-highway trucks and hoppers.”

A new auto dig system controls bucket tilt and lifting by sensing pressure applied to the work equipment. The system not only optimizes bucket load; it’s yet another way to help reduce operator fatigue, according to McGinnis.

Serviceability enhancements start with a swing-out rear door and standard auto-reversing fan that allow easier access to the wider fin space radiator for cleaning. Gull-wing engine doors provide convenient access for daily checks and service items. Additional hinged panels on each side of the machine allow easy access to regeneration components.

A sight gauge at the DEF fill cap, which has a magnetized holster to hold it during filling, helps to minimize overfilling. An optional engine pan and oil heaters are available for better startup in cold conditions.