Komatsu reveals upgraded mining loader

Komatsu has released an upgraded version of its 11-13 cubic-metre class mining loader, the WA900-8R, that the company said has been designed to deliver increased productivity and ease of operation while reducing operating costs.

Its new ‘SmartLoader Logic’ technology provides the engine with precisely the right amount of torque for each part of the duty cycle to help improve fuel economy by up to 10 per cent compared with the previous model, according to Komatsu’s National Product Manager, Mark Summerville.

Further productivity improvements include the addition of a modulation clutch for controlling speed and torque, along with faster boom raise speeds to give for faster cycle times.

“These features, combined with automatic dig and a semi-automatic approach and dump system means the WA900-8R can significantly improve an average operator’s efficiency,” Summerville said.

The new loader also includes a Komvision obstacle detection system that uses radar and 360-degree cameras to alert and prompt the operator to react if a person, vehicle or obstacle is detected which greatly improves the safety of personnel in and around the machine.

Replacing the WA900-3E0, the WA900-8R is powered by a Komatsu SAA12V140E-7 engine rated at 671 kW, and has an operating weight of 116.4 tonnes.

It’s matched for loading 90-tonne dump trucks (Komatsu HD785 size) in standard configuration, and up to 140 tonne trucks (Komatsu HD1500) in high-lift spec.

Komatsu’s innovative SmartLoader Logic technology optimises engine torque across all applications for reduced fuel consumption while always ensuring the loader has the torque and digging power it needs, the company said.

“This system functions automatically and doesn't interfere with operation, saving fuel without decreasing production,” Summerville said.

The system is matched to the loader’s automatic transmission, with an electronically controlled modulation (ECM) valve that automatically selects the correct gear speed based on travel speed, engine speed, and other travel conditions.

“This ECM valve system also engages the clutch smoothly to prevent lags and shocks when shifting, for more efficient machine operation and a more comfortable ride.”

The WA900-8R’s powertrain has a large capacity torque converter designed to ensure optimum efficiency.

“This ensures greater productivity in ‘V-shape’ loading applications because the torque converter’s increased tractive effort means it doesn’t require full throttle,” Summerville said.

“It also allows the loader to achieve higher gear ranges and maintain higher travel speeds when working in load-and-carry applications.”

The loader’s hydraulics are designed around Komatsu’s proven closed-centre load sensing system (CLSS) technology.

“This uses a variable displacement piston pump combined with CLSS to deliver hydraulic flow exactly when the task requires it, preventing wasted hydraulic flow, which further contributes to better fuel economy,” Summerville said.

Another new feature is a tyre slip control system, which helps to extend tyre service life. When it senses tyre slip, it applies the modulated clutch to control the torque converter and minimise tyre slip.

“All these features combine to reduce fuel consumption by up to 10 per cent – while also increasing productivity – compared with the WA900-3E0,” Summerville said.

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The new WA900-8R comes with Komatsu’s latest generation cab featuring a trainer seat, shockless stop cylinders, climate control air conditioning and modulated clutch for optimum operator comfort.

Alongside the comfort features are several new and innovative functions to help operators increase productivity.

“Our new automatic digging system actuates the bucket tilt and lifting operations by detecting the sensing pressure applied to the work equipment,” Summerville said.

“It’s designed to significantly reduce operator fatigue and improve efficiency ensuring optimum bucket fill every time the machine enters the pile, whether in rock or in loose materials.”

The system has been designed to work in conjunction with a new semi-auto approach and dump system.

“This automates boom lift and bucket dumping when approaching a dump truck, particularly in ‘V-shape’ loading operations,” Summerville said.

“Combining this with our automatic digging system, loading operations from stockpile to dump truck is made much easier, and operator effort and fatigue greatly reduced.”

A new air suspension seat in the cab provides enhanced support on rough roads and dampens machine vibrations, providing a more comfortable ride, Komatsu said.

Integrated with the seat is an electronic pilot control lever console and a joystick steering lever.

An electronically controlled suspension system (ECSS) now comes standard on the WA900-8R to reduce pitching and bouncing on uneven surfaces.

“This ensures better travel performance, reduced operator fatigue and less material spillage, while delivering a smooth ride, even at high travel speeds,” Summerville said.

A high-resolution in-cab monitoring system, which works in conjunction with Komatsu’s Komtrax Plus remote monitoring system, helps simplify maintenance and servicing for operators.

Side-opening engine doors, easily accessible engine compartment with dual-side engine bay access ladders, along with a swing-out cooling fan further simplify maintenance, Komatsu said.

The machine is also fitted with nine lanyard anchorage points, providing safer maintenance access in difficult areas.