Komatsu GD955-7 Motor Grader

Komatsu provides three engine variants, including a Tier 4 Final model, and alternatives meeting Tier 2 and Tier 3 emission standards.

The Tier 4 Final engine is designed to comply with the latest emission regulations while still delivering high power and fuel efficiency.

Technologies like Diesel Particulate Filter (KDPF) and Selective Catalytic Reduction (SCR) help reduce harmful emissions without sacrificing performance or durability.

The Variable Geometry Turbocharger adjusts airflow dynamically, ensuring optimal air supply during changing load conditions for consistent and efficient engine response.

A cooled Exhaust Gas Recirculation system is included to significantly lower nitrogen oxide (NOx) emissions during high combustion temperatures and extended operations.

High Pressure Common Rail fuel injection system ensures thorough fuel combustion by delivering precisely timed and pressurized fuel for reduced particulate matter.

The GD955-7 includes a lockup torque converter transmission that allows seamless switching between torque converter and direct drive modes for better control.

Operators can select between auto and manual driving modes, providing flexibility for both fine grading and heavy-duty hauling applications on site.

Lockup mode ensures maximum fuel efficiency during steady travel, while the torque converter mode provides smoother handling in rough or variable terrain.

Gearshift presets reduce the need for constant gear changes, allowing the operator to maintain smooth operation without frequent lever adjustments.

An anti-stall feature disengages the lockup clutch under load, automatically shifting to torque converter mode to prevent engine stalling in challenging conditions.

Dual-mode operation allows operators to select transmission preferences with a simple button press, tailoring machine behavior to site needs and terrain.

The GD955-7’s front frame is engineered with high-tensile steel in a wide-section layout, improving resistance against twisting and heavy stress impacts.

Rear frame uses a C-section structure that enhances strength while reducing weight, enabling better serviceability and reduced maintenance complexity.

The redesigned frame layout provides more space and better arrangement of components like the powertrain, easing accessibility during maintenance tasks.

Frame durability has been improved up to twice the lifespan of older models, reducing lifecycle cost and improving long-term structural reliability in harsh work.

This robust construction is particularly suited for mining and large-scale earthmoving projects where reliability and endurance are essential to minimize downtime.

Extensive reinforcement in areas of high stress reduces the risk of fatigue and frame failures during repeated cycles in demanding working conditions.

Fingertip controls are ergonomically placed beside the seat to reduce operator movement, making machine control easier and less physically tiring.

Both a steering wheel and lever are included, offering traditional steering for transport and joystick-style control for precision during grading tasks.

The hexagonal cab design with wide glass panels provides unobstructed visibility of the moldboard, tires, and surroundings for safer, more efficient operation.

An integrated rearview camera system allows full visibility behind the grader via a color monitor, enhancing safety during reverse and confined maneuvers.

The suspension seat, tilt/telescoping steering, and adjustable control consoles are all designed to maximize comfort and reduce fatigue over long shifts.

An advanced 7-inch LCD machine monitor provides real-time data, alerts, and system status, giving the operator more control and system awareness.

Ground-level service access points allow fast and safe maintenance of engine oil, hydraulic fluids, and filters without climbing or extended disassembly.

A centralized service center near the rear tires groups together major refill ports, helping reduce time and effort for daily machine servicing tasks.

Automatic greasing system supplies lubrication every 50 hours, eliminating manual greasing and improving uptime while reducing maintenance labor requirements.

Bearing-type circle design minimizes wear and eliminates the need for periodic circle play adjustments, a common cause of downtime in graders.

Component access is streamlined with large, hinged doors and modular systems that allow transmission removal without dismantling the operator cab structure.

Long oil change intervals—500 hours for engine, 1000 for transmission, and 2000 for hydraulics—minimize machine downtime and operating costs significantly.

The GD955-7 offers up to 33% more grading productivity compared to the GD825A-2 due to increased blade width and engine power.

A standard 5.5 m blade with an optional 6.1 m version allows the machine to handle wider paths, ideal for mining haul roads.

Higher engine output and greater operating weight enable faster ground coverage, even under heavy load and rough grading conditions.

A longer wheelbase contributes to a more aggressive blade angle, helping roll material more efficiently and reducing the required engine force.

Increased tread width and axle load improve stability, especially on hard-packed surfaces and in uneven terrain common in mining environments.

The powerful ripper can be configured with up to seven shanks, boosting its ability to penetrate tough soil or break up rock efficiently.