Komatsu Mining in addition to launching an innovative common platform for underground hard rock drills and bolters, has released two new LHDs, the redesigned WX04 4 t legacy model and the all new WX07 LHD, developed from the ground up with a whole new chassis, Z-link kinematics, revamped powertrain and optimised ergonomic operator cabin with enhanced visibility to help boost productivity. As with the new drills, Komatsu yellow now replaces Joy orange.

The WX07 replaces the old LT650 and is cited as ideal for small and narrow vein mines, particularly operations using cut-and-fill methods. An advanced and reliable powertrain is designed to deliver exceptional traction, optimised loading and low maintenance. Cummins QSB6.7 Tier 3 215 horsepower components include a new NRC, Dana electronic transmission TE14 and C3000 torque converter.

• Tramming capacity: 14,990 lbs. (6,800 kg)
• Bucket: 4.0 yd3 (3.1 m3)
• Height to top of canopy: 85.4 in (2,169 mm)
• Width overall: 85.75 in (2,178 mm)
• Low hood height for greater visibility and 360-degree cabin view

Ground-level maintenance design offers easy serviceability with vital maintenance components more accessible. “Facilitate faster, efficient repairs with added safeguards for your service crew. Data management features allow you to monitor, store and manage operational data to enhance servicing, troubleshooting, training and overall performance. Highest breakout force with up to 10% higher breakout force in its size class, the WX07 can fill the bucket quicker for faster cycle times.”

With a large 64-gallon (243-litre) fuel tank, users can operate longer underground without stopping to refuel. The WX07’s large fuel tank volume allows for longer working hour shifts and less refuelling handling and frequency.

The WX07 operator compartments are ROPS/FOPS certified with generous space and comfort. Clear visibility provides enhanced protection for the operator and those around. Superior ergonomics, easy-to-operate controls and comfort features reduce fatigue on longer shifts. Safety features include open-door interlocks that activate brakes while deactivating boom bucket and steering functions.

The WX07 also features Z-bar linkage and a reinforced boom design for superior breakout force enabling optimal penetration into the pile and fast bucket filling. Loading 20 to 22 t trucks is also easier with excellent lift capabilities.

The control panel for the WX07 is designed to be easy-to-use and informative. All the data and information operators need to perform, such as autogenerated diagnostic measurements, adjustments, and live data readouts, is readily accessible on a sleek control panel.

Based on the 4LD legacy machine, the redesigned WX04 is described as “a reliable 4 t LHD for narrow vein applications. The WX04’s high-strength steel frame design with heavy-duty, all mechanical powertrain can help you hit your production targets while keeping your costs down.”

The WX04 has a Stage V low-emissions engine. This engine option offers power and performance benefits, along with low emissions for regions that can use ultralow-sulphur fuel. A ground-level maintenance design again offers exceptional serviceability with vital maintenance components very accessible facilitating faster, efficient repairs with added protection for service crews.

With a breakout force up to 20% higher in its size class, the WX04 can fill the bucket quicker for faster cycle times. “The WXO4 leads the industry in the 4-tonne class with unmatched speed fully loaded on grade. This machine is powered by a dependable 133 horsepower Cummins QSB4.5 engine.”

• Tramming capacity: 8,800 lbs (4,000 kg)
• Bucket: 2.5 yd3 (1.9 m3)
• Height to top of canopy: 81.6 in (2,073 mm)
• Width overall: 62 in (1,575 mm)

“With a larger 190-litre fuel tank, you’ll have longer operational cycles without stopping to refuel. Your load-haul-dump cycles will achieve up to a 31% greater nonstop operation for continuous running and consistent productivity. The WX04 features the largest fuel tank in its class.”

The operator compartment is ROPS/FOPS certified with generous space and comfort. It features open-door safety interlocks that activate brakes while deactivating the boom, bucket and steering functions. There are no high-pressure hoses in-cab for an added layer of protection. A fully enclosed, environmentally controlled cabin is an available option for added operator comfort.

A heavily reinforced boom design enables industry-leading breakout force and optimal cycle times. A rigid cast cross-tube, a hard line for grease transfer to linkages, and integrated motion hard stops increase reliability. A new bucket design with an oversized spill guard offers cast or plate lip options, and the cast Z-link integrates lubrication channels and optimised geometry for added durability.

“Operators will appreciate the intuitive user-friendly touchscreen. Autogenerated diagnostic measurements and adjustments, as well as live data readouts ensure your operators have all the information they need for top performance.”

In addition to the models already discussed, the new WX03 is also set to replace the LT270. The two hybrid big machines have a name change, the 18HD will become the WX18H and the 22HD becomes the WX22H. Lastly on underground trucks, the HX07 will replace the 7TD and the HX16 is to replace the 16TD.