D275AX-5 Komatsu D275AX-5 Specifications & Technical Data (2020—2024)

Komatsu-integrated design

For the best value, reliability, and versatility. Hydraulics, power train, frame, and all other major components are engineered by Komatsu. You get a machine with components that are designed to work together to deliver higher production levels, greater reliability, and more versatility.

Track link with wedge ring

New D275AX-5 track links feature reduced press-fit force and a wedge ring. This results in easier maintenance with easy turning of pins and bushings. The result is improved undercarriage life and reduced maintenance costs, greater pin reusability, and reduced maintenance man-hours.

Comfortable ride with new cab damper mounting

D275AX-5’s cab mounts use a newly designed cab damper that provides an excellent shock and vibration absorption capacity with its long stroke. Cab damper mounts soften shocks and vibrations that conventional mounting systems are unable to absorb, whilst travelling over adverse ground conditions. The cab damper spring isolates the cab from the machine body, suppressing vibrations and providing a quiet, comfortable operating environment.

Pressurised hexagonal cab

The cab’s new hexagonal design and large tinted glass windows provide excellent front, side, and rear visibilitySuperior cab sealing, air filters and increased internal air pressure prevent dust from entering the cabThe high quality cab interior is fully lined with sound-absorbent material.

Preventative maintenance

Preventative maintenance is the only way to ensure long service life from your equipment. That’s why Komatsu designed the D275AX-5 with conveniently located maintenance points, to make required inspections and maintenance quick and easy.

Centralised service station

To assure convenient maintenance, all hydraulic and lubrication oil filters have been centralised to make access to all service points safe and easy.

Modular power train design

Power train components are sealed in a modular design that allows them to be dismounted and mounted without oil spillage. This makes servicing work clean, smooth, and easy.

O-ring face seal

The hydraulic hose connections use high quality O-ring face seals. They provide improved sealing performance against vibrations and load shocks.

Komatsu SAA6D140E-5

Engine with high pressure common rail injection delivers ample power in a fuel efficient way. The engine meets EU Stage IIIA emissions regulations.

Komatsu’s innovative engine technologies

A clean, powerful engine The powerful yet fuel-efficient engine makes the D275AX-5 an outstanding performer in both ripping and dozing operation. The SAA6D140E-5 surpasses EU Stage IIIA emissions regulation. It features direct fuel injection, a turbocharger, an aftercooler and EGR for maximum fuel efficiency.

Heavy duty HPCR system (High Pressure Common Rail fuel injection)

A high pressure pump pumps fuel into an accumulator chamber or ‘Common Rail’. An ECU (electronic control unit) then optimizes fuel injection from the common rail into the engine cylinders. This improves engine power and fuel efficiency, reducing emission and noise levels.

Heavy-duty cooled EGR system (Exhaust Gas Recirculation)

Cooled exhaust gas returned to the cylinders prevents nitrogen and oxygen bonding during combustion, reducing NOx emissions, lowering thermal stress and improving fuel efficiency.

Air-to-air charge air cooling system

By cooling the compressed air supplied by the turbocharger to the cylinders, this system optimizes combustion efficiency, reduces emissions and improves engine performance.

New combustion system

Our new combustion system optimises combustion timing and ignition. Thanks to extensive computer simulations and analyses, its specially designed combustion chamber reduces NOx and particulates emissions, fuel consumption and noise levels.

Enclosed hydraulic piping

The hydraulic piping for the blade tilt cylinder is completely housed in the push arm, ensuring damage protection.

Smooth and soft operation controlled by the engine and transmission controller

The D275AX-5 utilises a newly designed power train electronic control system. The controller registers the amount of operator control (movement of lever and operation of switches) along with machine condition signals from each sensor, such as the engine speed and machine angle. This is then used to accurately control the torque converter, transmission, steering clutches and brakes, for optimised machine operations.

ECMV (Electronically Controlled Modulation Valve) steering clutches/brakes

Using an innovative series of valves, the transmission controller automatically and smoothly makes each clutch engagement. The speed of each shift is based on travel conditions such as gear speed, engine RPMs and the current shifting sequence. This provides a smooth, shock-free clutch engagement, longer component life, and increased ride comfort. It also assists productivity because the ECMV manages the transmission, allowing the operator to concentrate on managing the blade position.

Hydrostatic Steering System – smooth, powerful turning

The Hydrostatic Steering System (HSS) is powered by an independent hydraulic pump with the engine power transmitted to both tracks, without an interruption of power to the inside track. When the machine turns, the outside track moves faster, and the inside track moves slower, for smooth, powerful turns. Counter-rotation is available for a minimum turning radius, providing excellent manoeuvrability. Shock-free steering reduces machine vibrations and minimises operator fatigue. The hydrostatic steering system reduces track damage to the ground to a minimum. The D275AX-5 offers beside of the HSS steering system also a pivot turn possibility. The „pivot turn mode“ can be activated on the dashboard. In this case the steering lever will activate the steering clutch and brake. As a result the dozer will make a pivot turn with a short turning radius.

Track shoe slip control system (option)

Eliminates the need for the operator to continuously control the engine power output with the decelerator whilst ripping. Operator fatigue is reduced substantially. Manoeuvrability is improved because the operator is free to concentrate on the ripping application without having to monitor track shoe slippage. Repair costs are significantly lowered and undercarriage life is prolonged with the reduction of track shoe slippage. The track shoe slip control system contributes to lower fuel costs, because the engine output is automatically controlled to optimum levels for each operation.

Torque converter

The highly efficient single-stage torque converter provides a high torque increase under changing load conditions, always providing optimal dozer performance. The torque converter provides a shockless, smooth power transfer between engine and transmission, resulting in superior operator comfort and a long power train lifetime.

Torque converter lock-up system

The torque converter is standard equipped with a lock-up system, bringing the power train efficiency of the Komatsu D275AX-5 to the highest level in its class. A selection switch on the monitor panel allows the operator to make two choices: the normal torque converter working mode, used during ripping and digging operations and the torque converter lock-up mode used during dozing operations. When the “torque converter lock-up mode” is chosen, the transmission controller will automatically engage and disengage the torque convertor lock-up system. In this way the power train will automatically use the best mode, combining highest traction force and speed with the lowest fuel consumption.

Improved efficiency with hydrostatic-driven engine cooling fan

Fan rotation is automatically controlled, based on the coolant and hydraulic oil temperature. This saves fuel and provides great productivity with a quiet operating environment.

K-Bogie undercarriage system

The K-bogie undercarriage system is constructed with a fixed idler and flexible mounted track rollers. The track rollers are mounted by pair on a twin bogie system, allowing a high vertical track roller movement.

Reliable, simple structure

The simple hull structure main frame design increases durability and reduces stress concentration in critical areas. The track frame has a large cross section and utilises pivot shaft mounting for greater reliability.

Gull wing engine side covers

Gull wing engine side covers facilitate easy engine maintenance and filter replacement. The side covers are a solid structure with a bolt-on latch to improve durability and repairability.

Palm command electronic controlled travel joystick

The palm command travel joystick provides the operator with an environment that supports a comfortable posture and precise machine control, without fatigue. Shifting gears is easily carried out with the gear shift lever's push button control. The system's proportional steering controller increases safety and assists in precision operations. At the lowest speeds, the total range of steering directions is fully available, giving precise direction control. This makes counter-rotation turns possible when standing in the same space. The range of steering directions is proportionately reduced as the dozer's travel speed increases, keeping turning manoeuvres within safe ranges and making sharp, unsafe turns at high speeds impossible. All of the signals are transmitted via an engine and transmission controller, preventing overload of the hydraulic steering system and protecting hydraulic and mechanical parts. Because the controller linkages between the engine speed dial, decelerator pedal, and the engine are electrical, there is no wear of moving linkage parts.

Blade and ripper control joystick

The blade and ripper control joysticks have an ergonomic design and allow long operator work shifts with fine blade control.

Engine speed control dial

The rate of engine RPMs is continuously controlled and checked by the engine controller in function of the requested load, saving on fuel. Because the controller linkages between the engine speed dial, decelerator pedal, and the engine are electronic, there is no wear of moving linkage parts.

Preset travel speed selection function

The preset travel speed selection function is standard equipment, enabling the operator to select forward and reverse travel speeds within 3 preset patterns such as F1-R2, F2-R2 and manual shift. When the F1-R2 or F2-R2 preset pattern is selected, and the travel control joystick moves to a forward/reverse direction, the machine automatically travels forwards/backwards at the preset F1/R2 or F2/R2 speeds. This function reduces gear shifting time during repeated round-trip operations.

Auto-downshift function

The engine controller monitors engine speed, travel gear, and travel speed. When a load is applied and the machine travel speed is reduced, the controller automatically downshifts and optimises the gear speed to provide high fuel efficiency. This function provides comfortable operations and high productivity without manual downshifting. (This function can be deactivated by a cancel switch on the monitor panel.)

Operator comfort

Operator comfort is essential for safe and productive work. The D275AX-5 provides a quiet, comfortable environment where the operator can concentrate on the work at hand.

Superior blade and ripper visibility

The slim engine bonnet and well-located operator seat provide excellent blade visibility. Finish grading and rough grading can both be performed easily, significantly reducing cycle times. The special shape of the fuel tank allows the operator to have a clear view of the total width of the dozer back side, not only on the ripper point. This improves the ripper efficiency and safety level.

Fully-adjustable suspension seat and travel control console

The comfortable, heavy-duty ergonomic seat gives the operator a secure and comfortable work environment. During dozing operations, the seat faces straight forward, resulting in the best blade visibility to the left and right. For reverse and ripping operations, the operator’s seat can be turned 15° to the right, significantly improving rear visibility and reducing neck strain. The travel control joystick, with its complete console, can be moved forward, backward, and up and down, so that it’s fitted to each operator. It’s also linked to the turn function of the seat, ensuring it’s always located in the optimum position for the operator.

Blades

Komatsu uses a box blade design, offering the highest resistance for a low weight blade. This increases total blade manoeuvrability. High-tensile-strength steel has been incorporated into the front and sides of the blade for increased durability. The blade shape design makes it easy to handle a wide range of materials, offering good blade penetration, combined with a low blade rolling resistance. Finally, Komatsu blades help deliver very good, lower fuel consumption performance.

Semi-U blade

The Komatsu Semi-U blade is designed to stand up to the toughest applications. The shape of the blade gives excellent ground penetration. Its two side wings prevent material spillage, giving class-leading dozing performance.

U blade

The Komatsu U blade has been especially designed to doze large capacities of product with a minimum of spillage. Apart from the large capacity, the excellent blade design also offers a good rolling performance, getting the best out of the dozer.

Rippers

Komatsu rippers combine the highest productivity and longevity. The shank is fitted with specially designed wear parts to extend lifetimes and deliver the best penetration into any material. Komatsu’s patented variable-angle rippers provide the ideal bolder removal action. Their special design allows the cylinders to work in harmony for the ideal combination of ripper-point movement and lifting-out force. Moreover, you have precise control over the ripper-point angle to ensure maximum productivity.

Low drive undercarriage

Komatsu’s design is extraordinarily tough and offers excellent grading ability and stability. Heavy-duty link assemblies with large-diameter bushings, substantial track link height, and superior oil seals increase undercarriage durability and lifetime. Serviceability is also assisted by the remote greasing of the equaliser bar centre pin. Additionally, the segmented sprockets can be replaced individually, by hand, making it possible for one mechanic to carry out replacements at the job site. The design also gives the driver a perfect view of the blade tips, making work easier and more precise.