Komatsu D375A-6 Brochure

CEN00372-00 Materials and specifications are subject to change without notice is a trademark of Komatsu Ltd. Japan HORSEPOW Gross: 474 kW 636 HP @ 1800 Net: 455 kW 610 HP @ 1800 OPERATING WEI 71640 kg 157,94 Photo may include optional equipment. D375A-6 CRAWLER DOZER D 375A

● Electronic controlled PCCS travel control ● Hydraulic controlled PCCS blade/ripper control ● Fuel control dial ● Automatic/manual gearshift selectable mode ● Gearshift pattern preset function ● ECMV controlled transmission See page 4. Large TFT LCD monitor ● Easy-to-see and use 7" large multi-color monitor. ● Can be displayed in 10 languages for global support. TFT : Thin Film Transistor LCD : Liquid Crystal Display See page 8. 2 D375A-5 Crawler Dozer Simple hull frame and monocoque track frame with pivot shaft for greater reliability. Extra-low machine profile provides excellent machine balance and low center of gravity. Large blade capacities: 18.5 m3 24.2 yd3 (Semi-U dozer) and 22.0 m3 28.8 yd3 (U dozer) Preventative maintenance ● Centralized Service Station ● Enclosed Hydraulic Piping ● Modular Power Train Design ● Oil Pressure Checking Ports See page 9. Photo may include optional equipment. The Dual tilt dozer (optional) increases productivity while reducing operator effort. See page 6. Automatic transmission with lockup torque converter increases speed and power to improve fuel consumption and productivity. See page 6. New track link design reduces maintenance cost by making turning pins easier, with improved pin reuse. See page 9. K-Bogie undercarriage system improves traction, component durability, and operator comfort. See page 8. Rippers (optional): ● Variable giant ● Multi-shank See page 7. New hexagonal designed cab includes: ● Spacious interior ● Comfortable ride with new cab damper mounting and K-bogie undercarriage ● Excellent visibility ● High capacity air conditioning system (optional) ● PCCS (Palm Command Control System) lever ● Pressurized cab (optional) ● Adjustable left armrest ● Travel control console integrated with operator seat See page 8. Track shoe slip control system (optional) reduces operator fatigue. See page 7. 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 whose components are designed to work together for higher production, greater reliability, and more versatility. Low-drive, long-track, eight roller undercarriage provides outstanding grading ability and stability. WALK-AROUND D375A-6 HORSEPOWER Gross: 474 kW 636 HP @ 1800 Net: 455 kW 610 HP @ 1800 OPERATING WEIGHT 71640 kg 157,940 lb BLADE CAPACITY Semi-U: 18.5 m3 24.2 yd Full-U: 22.0 m3 28.8 yd3 CRAWLER DOZER D375A-6 C R A W L E R D O Z E R Hydraulic drive radiator cooling fan controlled automatically, reduces fuel consumption and operating noise levels. See page 6. ECMV (Electronic Controlled Modulation Valve) controlled steering clutch/brake system facilitates smooth and shockless steering operation. See page 5. SAA6D170E-5 turbocharged after-cooled diesel engine provides an output of 474 kW 636 HP with excellent productivity. This machine is EPA Tier 3 and EU stage 3A emissions certified. See page 6.

Palm command travel joystick provides the operator with a relaxed posture and superb fine control without operator fatigue. Transmission gear shifting is simplified with thumb push buttons. Fully adjustable suspension seat and travel control console For improved rear visibility during return part of cycle, the operator can adjust the seat 15° to the right. The transmission and steering controls move with the seat for best operator comfort. The travel control console also has adjustments fore and aft and for height. With an independently adjustable armrest, each D375A operator can adjust control positions to his individual preference, providing optimum operational posture for all operators. Fuel control dial Engine speed is controlled by electric signals, providing ease of operation eliminating maintenance of linkage and joints. Palm command PPC controlled blade control joystick Blade control joystick uses the PPC (Proportional Pressure Control) valve and the same palm command type joystick as travel control joystick. PPC control, combined with the highly reliable Komatsu hydraulic system, provides superb fine control. (Dual tilt and pitch operation are activated by depressing switch with a thumb. This is available with optional dual tilt dozer.) Height adjustable blade control armrest Blade control armrest is height adjustable without any tools in three stages, providing the operator with firm arm support and ideal armrest positioning. Position adjustable ripper control lever Ripper control lever is position adjustable, providing optimum operation posture for all operators during ripping operations facing front or watching ripper point. 4 Komatsu’s new ergonomically designed control system “PCCS” creates an operating environment with “complete operator control”. Power Train Electronic Control System Smooth operation D375A-6 uses a newly designed power train electronic control system. The controller registers the amount of operator control (movements of lever and operation of switches) and machine condition signals from each sensor, and calculates to accurately control torque converter, transmission, steering clutches and brakes for optimized machine operation. The ease of operation and productivity of the new D375A-6 is greatly improved by numerous new functions. ECMV (Electronic Controlled Modulation Valve) controlled transmission Controller automatically adjusts each clutch engagement depending on travel conditions such as gear speed, revolution and shifting pattern. This provides shockless smooth clutch engagement, improved component reliability, expansion of component life and operator riding comfort. ECMV (Electronic Controlled Modulation Valve) controlled steering clutches/brakes Sensors monitor machine operating conditions, and the controller activates ECMV electronically to control steering clutches and brakes depending on type of job, such as size of load during dozing, incline angle of slope or load, providing smooth and ease of operation by reducing counter-steering on downhill travel, etc. Preset travel speed selection function When the gearshift pattern is set to either , or in automatic gearshift mode, the gear is automatically shifted, reducing round trip repetition work time and operator's efforts. When dozing and turning, ECMV automatically controls stroke ratio of steering clutches and brakes depending on degree of load, enabling smooth dozing and turning. When dozing downhill, ECMV automatically controls steering clutches and brakes depending on incline of machine or degree of load, reducing counter-steering and producing smooth dozing operation. Auto downshift function Controller monitors engine speed, travel gear and travel speed. When load is applied and machine travel speed is reduced, the transmission automatically downshifts to optimum gear speed to provide high fuel efficiency. This function provides comfortable operation without manual downshift and high productivity. F1-R1 MODE Automatic gearshift mode F1-R2 MODE F2-R2 MODE Press DOWN switch Press DOWN switch Press UP switch Press UP switch F2-R3L MODE Press DOWN switch Press UP switch F1-R1 MODE Shoe slip control mode (optional) F1-R2 MODE Press DOWN switch Press UP switch F1-R1 MODE Manual gearshift mode F1-R2 MODE F2-R2 MODE Press DOWN switch Press DOWN switch Press UP switch Press UP switch UP DOWN Heavy load Light load Actuated on heavy load or steep slope Effect of ECMV steering clutches/brake control Facing front When turned 15° Blade and ripper control joysticks ECMV ECMV ECMV ECMV ECMV EPC EPC [Komnet] Electronic controlled travel control lever Blade control lever Ripper control lever Fuel� control � dial Brake pedal Monitor panel Rear view camere (Option) Orbcomm controller VHMS controller Deceleration pedal Transmission control valve Engine controller P/T controller Transmission control, Torque converter control, Steering control (Option) W/E controller (Implement control) Electronic controlled transmission Engine Fan motor Fan pump Lock up Torque convertor control valve Torque converter Electronic controlled steering/brake system Acceleration sensor (Option) Dual tilt and pitch select valve (Option) ECMV ECMV ECMV ECMV Auxiliary valve Transmission output speed sensor ( ) Outline of electronic control system Electronic Controlled Modulation Valve (ECMV) Conventional modulation valve Time Clutch pressure CONTROL FEATURES D375A-6 CRAWLER DOZER D375A-6 C R A W L E R D O Z E R RH DOWN SHIFT UP SHIFT F LH R

ripping operation easy and effective while maintaining high penetration force. ● The variable giant ripper is a parallelogram single shank ripper ideal for ripping tough material. The ripping angle is variable, and the depth is adjustable in three stages by a hydraulically controlled pin puller. ● The multi-shank ripper is a hydraulically controlled parallelogram ripper with three shanks. Large blade Capacities of 18.5 m3 24.2 yd3 (Semi-U dozer) and 22.0 m3 28.8 yd3 (U dozer) yield outstanding production. High- tensile-strength steel comprising the front and sides of the blade increase durability. The shape of the blade features high load hauling efficiency. The end bit with improved cutting performance is standard equipment. Dual tilt dozer (optional) The dual tilt dozer increases productivity while reducing operator effort. ● Optimum blade cutting angle for all types of materials and grades can be selected on-the-go for increased load and production. ● Digging, hauling, and dumping are easy and smooth with less operator fatigue. ● Dozer tilt angle and tilt speed are twice that of a conventional single tilt system. Torque converter Engine Transmission Lockup “ON” Lockup “OFF” Fulcrum of major bogie Fulcrum of minor bogie Engine The Komatsu SAA6D170E-5 engine delivers 474 kW 636 HP at 1800 rpm. The fuel-efficient Komatsu engine, together with the heavy machine weight, make the D375A-6 a superior crawler dozer in both ripping and dozing production. The engine is EPA Tier 3 and EU stage 3A emissions certified, and features direct fuel injection, turbocharger, air-to-air aftercooler and cooled EGR system to maximize fuel efficiency. To minimize noise and vibration, the engine is mounted to the main frame with rubber cushions. Hydraulic drive radiator cooling fan Fan rotation is automatically controlled depending on coolant and hydraulic oil temperature, saving fuel consumption and providing great productivity with a quiet operating environment. Automatic transmission with lockup torque converter A sharp reduction in fuel consumption and greater power train efficiency is achieved by the new automatic gearshift transmission and lockup torque converter. The automatic gearshift transmission selects the optimal gear range depending on the working conditions and load placed on the machine. This means the machine is always operating at maximum efficiency. (Manual gearshift mode is selectable with a switch) K-Bogie undercarriage system New K-Bogie undercarriage system combines prior advantages with new additional features. Current features: ● K-Bogies that oscillate with two fulcrums assure large amount of track roller vertical travel. Impact load to undercarriage components is minimized and durability of components is improved since track rollers are always in contact with track link. ● Track rollers follow track link movement to extend the undercarriage life. ● Excellent riding comfort is provided due to less vibration and shock when traveling over rough terrain. Features on new K-Bogie undercarriage system: ● New K-Bogies with front and rear single bogies are utilized providing increased length of track on ground to improve machine stability and leveling performance. ● The oscillating idler and increased sprocket lead angle improve riding comfort when travelling over rough terrain. 6 PRODUCTIVITY FEATURES D375A-6 CRAWLER DOZER D375A-6 C R A W L E R D O Z E R Manual gearshift mode screen Automatic gearshift mode screen Gearshift mode selector switch Working mode selector switch Shoe slip control mode screen (optional) Track shoe slip control mode (optional) ● Eliminates the need for the operator to constantly control engine power output with the decelerator pedal while ripping. Operator fatigue is substantially reduced. ● Maneuverability is improved because the operator is free to focus on the ripping application without having to monitor the track shoe slippage. ● Repair costs are significantly lowered and undercarriage life is prolonged with the reduction in track shoe slippage. ● The track shoe slip control system will contribute to lower fuel costs, because the engine output is automatically controlled to optimum levels for operation. Automatic/manual gearshift and shoe slip control (optional) selectable mode Automatic or manual gearshift modes can be selected with ease to suit the work at hand by simply pressing the switch on the multi-monitor (The mode can be selected when the travel control joystick is at NEUTRAL.). ● Automatic gearshift mode The mode for general dozing. When a load is applied, the gear automatically shifts down, and when the load is off, it automatically shifts up to a set maximum gear speed. This mode economizes both fuel and production where the torque converter lockup mechanism is actuated according to load, automatically selecting the optimum gear speed. ● Manual gearshift mode The mode for dozing and ripping rough ground. When loaded, the gear automatically shifts down, but does not shift up when the load is off. Working mode This mode can be set to either “P mode” for the maximum power or “E mode” for energy saving operation. Combined with the automatic gearshift mode or manual gearshift mode, the working mode allows the operator to select the optimum machine operating condition for the work at hand. (The mode can be switched during operation.) P mode E mode

D375A-6 with conveniently located maintenance points to make necessary inspections and maintenance quick and easy. Low Maintenance Costs Hexagonal pressurized cab ● The cab’s new hexagonal design and large tinted glass windows provide excellent front, side and rear visibility. ● Air filters and a higher internal air pressure combine to prevent dust from entering the cab. Fresh air intake from rear of engine hood The air conditioner air intake port is now located at the rear of the engine hood where there is minimal dust. As a result, the air inside the cab is always clean. Cleaning interval of the filter is greatly extended, and use of a new structure filter element facilitates cleaning and replacement. Large multi-lingual LCD color monitor A large user-friendly color monitor enables safe, accurate and smooth work. Improved screen visibility is achieved by use of TFT (Thin Film Transistor) liquid crystal display that can easily be read at various angles and lighting conditions. Simple and easy to operate switches. Industry first function keys facilitate multi-function operations. Display data in 10 languages to globally support operators around the world. Comfortable ride with new cab damper mounting and K-Bogie undercarriage D375A-6’s cab mount uses a new cab damper mounting which further improves viscous damper and provides excellent shock and vibration absorption capacity with its long stroke. The cab damper mounting, combined with new K-bogie undercarriage, softens shocks and vibrations while traveling over adverse condition that are impossible to absorb with conventional cab mounting methods. The soft spring cab damper isolates the cab from machine body, suppressing vibrations and providing a quiet, comfortable operating environment. New suspension seat D375A-6 uses a new suspension seat. Fore and aft sliding rails and suspension spring increases strength and rigidity and reduces play of joints. New seat provides excellent support and riding comfort. Fore and aft sliding amount is designed to fit all operators. In addition, air suspension seat with seat isolator is optionally available, that reduces vertical and lateral vibrations more effectively. Photo may include optional equipment. Track link with wedge ring New D375A-6 track links feature reduced press-fit force and a wedge ring. Conventional track pins are retained only with a large press-fit force. The new track link divides pin forces between the wedge ring and press-fit force. This results in easier service with reduced pin damage when turning pins and bushings. The result is improved undercarriage life and reduced maintenance cost through reduced wear, greater pin reusability, and reduced maintenance man-hours. Highly reliable electric circuit The electrical circuit reliability is increased by utilizing dust, vibration and corrosion resistant "DT connectors". The reinforced electrical wiring harnesses include a circuit breaker and are covered with a heat-resistant material to increase mechanical strength, provide longer life, and protect the system from damage. Flat face O-ring seals Flat face O-ring seals are used to securely seal all hydraulic hose connections and to prevent oil leakage. Enclosed hydraulic piping Hydraulic piping for the blade tilt cylinder is completely housed in the push arm protecting it from damage. Modular power train design Power train components are sealed in a modular design that allows the components to be dismounted and mounted without oil spillage, making servicing work clean, smooth, and easy. Maintenance-free disc brakes Wet disc brakes require less maintenance. Wedge ring Pin press fitting force + wedge ring holding force Track guiding guard WORKING ENVIRONMENT D375A-6 CRAWLER DOZER D375A-6 C R A W L E R D O Z E R EASY MAINTENANCE Multi-monitor with troubleshooting function to prevent critical machine troubles Various meters, gauges, and warning functions are centrally arranged on the multi-monitor. Offers ease of start-up inspection and promptly warns the operator with a lamp and buzzer if any abnormalities should occur. In addition, countermeasures are indicated in 4 stage codes to ensure safety and prevent the machine from major problems. Replacement times for oil and filters are also indicated. Centralized service station To ensure convenient maintenance, the transmission and torque converter oil filters are both arranged next to the power train oil level gauge. Oil pressure checking ports Pressure checking ports for power train components are centralized to promote quick and simple diagnosis. Enlarged engine room Engine room space is enlarged by increasing engine hood height, facilitating maintenance of the engine and related equipment. Solid engine hood prevents dust and rain from entering and keeps the engine clean. Gull-wing engine side covers Gull-wing engine side covers facilitate engine maintenance and filter replacement. Side covers are a thick two-piece structure with bolt-on latch to improve durability and repairability. Photo may include optional equipment. Extra switches Basic operation switches Function switches Indicators Rubber Silicon Oil Spring Rubber Boot Cab damper mounting Maintenance warning screen Abnormality warning screen Maintenance List screen for replacement time display