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HM300-3 Powered by Komatsu Tier IV Interim Engine Technology

Fri July 22, 2011 - National Edition
Construction Equipment Guide

With a flywheel horsepower of 325 hp (242 kW), Komatsu’s HM300-3 articulated truck is powered by a Komatsu SAA6D125E-6 engine and is EPA Tier IV Interim and EU Stage 3B emission certified.

The HM300-3 features a maximum gross vehicle weight (GVW) of 115,147 lb. (52,230 kg). It can haul up to a 31 ton (28.1 t) payload at its maximum ground speed of 36.4 mph (58.6 kmh). Improved operating performance, lower fuel consumption, improved operator comfort and enhanced serviceability are additional features of the HM300-3 that provide maximum productivity and lower operating costs, according to the manufacturer.

The HM300-3 is equipped with the latest Komtrax technology, which sends machine operating information to a secure Web site utilizing wireless technology. Data such as daily fuel consumption, machine utilization, operating hours, location, cautions and maintenance alerts are relayed to the web application for analysis. The Komtrax fleet monitoring system increases machine availability, reduces the risk of machine theft, allows for remote diagnosis by the distributor, and provides a wealth of other information to drive business efficiency and productivity.

Special features of the new HM300-3 include:

• EPA Tier IV Interim and EU Stage 3B Emission Certified Engine

Built upon Tier III technology, the SAA6D125-6 engine provides increased horsepower while lowering fuel consumption. The Komatsu Tier IV Interim engine uses an advanced electronic control system to manage air flow rate, fuel injection, combustion parameters, and aftertreatment functions to optimize performance, reduce emissions and provide advanced diagnostic capability.

Komatsu also has developed a hydraulically actuated Komatsu variable geometry turbocharger (KVGT) and an exhaust gas recirculation (EGR) valve, resulting in better precision and air management as well as longer component life. The Komatsu diesel particulate filter (KDPF) has an integrated design that will not interfere with daily operation but will keep the operator aware of its status.

• Improved Operation

The HM300-3 features the new Komatsu traction control system (K-TCS). The K-TCS system automatically provides optimum traction when operating in soft ground conditions. As ground conditions worsen and tire slippage is detected by speed sensors located on four wheels, automatic application of the inter-axle differential lock occurs. If tire slippage continues to be detected then four independent brakes can be applied to slipping wheels to regain traction.

The HM300-3 is enhanced with K-ATOMiCS—Komatsu Advanced Transmission with Optimum Modulation Control System. K-ATOMiCS offers a six-speed, fully-automatic transmission that uses an advanced electronic system to eliminate shift shock and torque cutoff to improve operator and engine efficiency. It automatically selects the ideal gear based on vehicle speed, engine rpm and the shift position chosen, which results in powerful acceleration, smooth down shifting and synchronized engine speed when climbing slopes. This ultimately minimizes operator fatigue, keeps the load in the body and increases productivity.

A large automatic retarder allows the operator to select the optimum operating speed on downhill travel and fully loaded hauls, eliminating acceleration generated by the grade of the slope.

• Increased Payloads

Through body design optimization, the HM300-3 features increased body capacity and payload. The low 9 ft. 2 in. (2.8 m) loading height easily matches with 30- to 60-ton (27 to 54 t) hydraulic excavators or 5 to 7.5 cu. yds. (3.8 to 5.7 cu m) wheel loaders. In addition, the two single-staged body lift cylinders provide a 70-degee dump angle.

• Enhanced Operator Environment

The new cab design provides a comfortable and quiet work environment so operators can maximize their productivity. The ROPS/FOPS Level 2 certified cab features a new rounded front dash panel with easy to reach switches. The dashboard has been redesigned and relocation of the high back, heated air ride seat with point seat belt improves operator visibility. An auxiliary input also has been added to connect an MP3 player or other device along with two 12-volt ports that have also been incorporated into the cab.

A new high resolution 7 in. LCD monitor features enhanced capabilities and displays information in 25 languages for global support. Using the monitor, the operator can easily modify settings for items such as the auto idle shutdown or the auto-reversing fan; check operational records, such as driving history or fuel consumption; monitor the KDPF or check how much time is required before the next maintenance interval. The monitor also offers the operator the option of using the ECO guidance function, which will provide operational tips to reduce fuel consumption. A separate high resolution back-up camera is standard with every machine and is mounted on the right hand side of the console for operator convenience.

• Convenient Maintenance and Serviceability

The HM300-3 provides easy service access to reduce costly downtime. The new model features a newly designed engine hood for easy access, increased cooling capacity, and a standard hydraulically driven auto-reversing fan to help keep the radiator and charge air cooler clean.

The machine is equipped with the Komatsu EMMS (equipment management monitoring system), which has enhanced diagnostic features that give the operator and technicians greater monitoring and troubleshooting capabilities. EMMS also continuously monitors all critical systems, preventative maintenance, and provides troubleshooting assistance to minimize diagnosis and repair time.

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