Motoniveladora Komatsu GD555 Motor Grader working at the Road Construction site. This Grader grading CTB aggregate over old worn asphalt. Cement-treated base (CTB) is an intimate mixture of aggregate material and/or granular soils combined with measured amounts of cement and water that hardens after compaction and curing to form a durable paving material. A bituminous or cement concrete wearing course is placed on the CTB to complete the pavement structure. Cement-treated base is widely used as a pavement base for highways, roads, streets, parking areas, airports, and materials handling and storage areas.
The Komatsu GD555-3 motor grader has a Komatsu SAA6D102E-2 direct injection, turbocharged, aftercooled, six-cylinder engine producing 140 flywheel horsepower (FWHP). It has a full powershift transmission with integral free-wheeling stator torque converter and lock-up. It comes standard with an advanced monitoring system, blade suspension system, low front nose, bronze alloy guides on the blade, manual lock/unlock differential, and hydraulically operated wet multiple disc and adjustment free brakes. It has an operating weight of 30,950 pounds (14,039 kg).
The GD555-3 has a closed center load sensing hydraulic system with a variable displacement piston pump delivering fluid at a rate of 54 gallons (205 L) per minute at a system pressure of 3,000 lbs per square inch (PSI) (20,684 kPa)
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