Komatsu America Corp.'s PC138USLC-10 tight tail swing hydraulic excavator has an operating weight range of 31,791-32,628 lb (14,420-14,800 kg). The U.S. EPA Tier 4 Interim and EU Stage 3B emissions certified machine is the newest addition to Komatsu’s Dash-10 excavator lineup.
Komatsu's SAA4D95LE-6 engine with a net horsepower of 93.5 hp (68.8 kW) powers the new Dash-10. Built upon the company Tier 3 engine platform, the SAA4D95LE-6 maintains engine performance while lowering fuel consumption up to 7%, compared to the previous series. The Tier 4 Interim engine platform uses an advanced electronic control system to manage airflow rate, fuel injection, combustion parameters, and aftertreatment functions to optimize performance, reduce emissions, and provide advanced diagnostic capability.
The new Komatsu Diesel Catalyst (KDOC) has an integrated design allowing the system to remove soot using 100% “passive regeneration” without the need for a DPF. Unlike a DPF, the KDOC does not have a scheduled replacement interval and is designed for no maintenance. Less complexity and truly seamless operation for the operator means lower owning and operating costs.
A new variable flow turbocharger, direct flow air filter, high-pressure common rail fuel injection, 16-valve cylinder head, and EGR are also part of the design of the new machine. The result is precise air flow management and more complete combustion, also helping to eliminate the need for a DPF.
Like the previous Dash-8 series, the Dash-10 uses a contoured cab design that allows the cab to swing within the same radius as the counterweight. The work equipment is also designed to minimize the front swing radius for better operation in confined areas.
With the standard additional counterweight, the PC138USLC-10 provides the same level of lift capacity and stability as a conventional excavator but with the versatility of a tight tail excavator.
All of the new excavator’s major components—including the engine, hydraulic pump, motors, and valves—are exclusively designed and manufactured by Komatsu. This integrated design employs a closed center load sensing hydraulic system that takes hydraulic efficiency to the next level, utilizing both variable-speed matching and low-speed matching technology.
Variable-speed matching allows the engine speed to adjust based on the hydraulic pump output for both light- and heavy-duty applications, while low-speed matching utilizes a larger pump capable of producing higher pump output at lower engine speeds.
The new cab is loaded with features and provides a comfortable and quiet work environment for maximized productivity. The contoured ROPS certified cab with sliding door is specifically designed for the PC138ULSC-10. The cab is mounted on viscous damper mounts to reduce vibration. An auxiliary input has been added to connect an MP3 player or other device that uses a standard auxiliary plug, along with two 12-V ports that have also been incorporated into the cab.
A new high-resolution 7-in LCD color monitor features enhanced capabilities and displays information in 25 languages for global support. The operator can easily select from six working modes of operation to match machine performance to the application, including: Power Mode, Economy Mode, Heavy Lift Mode, Breaker Mode, Attachment Economy, and Attachment Power.
The new monitor panel also provides Eco Guidance (operational efficiency guidance), operational records, fuel consumption history, and utilization information. The standard rearview monitoring system allows the operator to view directly behind the machine with the push of a button.
Easy access to service locations reduces downtimes. The new model has a convenient access handrail on the upper structure. The radiator and hydraulic oil cooler are mounted side by side, making maintenance and service simpler. Daily service checks are also easier with wide access service doors.
The machine is equipped with the exclusive Komatsu EMMS (Equipment Management Monitoring System) with diagnostic features that give the operator and technicians greater monitoring and troubleshooting capabilities. EMMS also continuously monitors all critical excavator systems, tracks the preventative maintenance schedule, and provides troubleshooting assistance to minimize diagnosis and repair time.
For owners, fleet managers, and operators looking to maximize their equipment, the PC138USLC-10 is equipped with the latest KOMTRAX technology, which sends machine operating information to a secure website utilizing wireless technology.
Data such as operating hours, machine location, maintenance notifications, out-of-area notifications, machine utilization, and residual fuel levels are relayed to the web application for analysis.
The KOMTRAX fleet monitoring system monitors machine availability, reduces the risk of machine theft, allows for remote diagnosis by the distributor, and other information to maximize efficiencies.