A Komatsu loader is a machine used for lifting and moving heavy materials, such as soil, rock, and gravel, using a hydraulic powered bucket. A combination of a diesel engine, hydraulic systems, and mechanical leverage are the three elements that make Komatsu's loaders work, along with Komatsu's proprietary technology for improved performance, strength, and control.
The Diesel Engine is the core of the loader's power train.
All loaders have the same basic working principle: The diesel engine generates torque via the torque converter, which sends power to the loader's transmissions and drives the hydraulic pump to supply high-pressure hydraulic fluid to the loader's implement and steering systems.
The Komatsu diesel engine generates the most torque of any diesel engine available today.
The torque converter is a fluid coupling that connects the engine to the transmission. The torque converter helps the engine generate more torque, typically when the loader is used to "dig" into a pile of dirt or another material, and allows the loader to come to a complete stop without stalling the engine.
The transmission, which is typically hydromechanical, powershift or both, is the means by which the engine's torque is transmitted to the loader's wheels and axles. Most Komatsu loaders use a hydromechanical transmission, which provides superior speed control and increased fuel efficiency compared to other types of transmission.
The loader's hydraulic system consists of hydraulic pumps, hydraulic cylinders, control valves, and hydraulic fluids.
The hydraulic pumps provide the power to lift and move the loader's bucket, and the hydraulic cylinders control the loader's steering system.
The hydraulic pumps generate high-pressure hydraulic fluid from the engine to the loader's pumps.
The operator uses foot pedals and joysticks to control the flow of hydraulic fluid to the loader's hydraulic pumps.
For example, the two lift cylinders raise and lower the loader's boom and bucket.
The tilt cylinder curls the bucket forward to dump and backward to retain a load.
The loader's steering cylinders are powered by a separate hydraulic system.
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"The equipment has withstood ten-hour days hauling shot rock & feeding a crusher without a glitch. The operator cabs are comfortable, & compared to the prior machines used, fuel savings are substantial & true. The initial outlay is easily justified by the amount of uptime generated."
"Since the Komatsu WA470-8 was delivered to our site it has been the most sought after machine on the job site. Operators say the controls are user-friendly, visibility is excellent, & the ride is smoother than expected. Bucket leveling & return-to-dig features enable operators to load trucks quickly, resulting in less fatigue when loading."
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