How Does a Hydraulic Pump Work

The advantage of using a hydraulic machine is that more force and torque can be generated with relatively smaller sized machines without requiring a gear system. An important component of a hydraulic machine is the hydraulic pump. The supply of fluids like oil and water to the various components of the machine is accomplished by using hydraulic pumps. Their mechanism is based on the displacement of the fluid volume against a resistant load or pressure. Hydraulic Machinery The machines that make use of fluid power to carry out the necessary function or to do work in general are called hydraulic machinery. In these machines, a fluid having high velocity is distributed to the hydraulic motors and hydraulic cylinders through tubes...

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Rebuild a Hydraulic Cylinder

Hydraulic systems are widely used in agriculture, construction and manufacturing industry. Bulldozers, cranes, tractors, elevators and all such heavy machines use hydraulics. Hydraulic hybrid vehicles are some of the newest developments in this field of technology. Hydraulics is an applied science, which exploits the mechanical properties of fluids to build hydraulic systems that can perform heavy duty mechanical jobs with precision. Hydraulic systems offer power with precise control and versatility. At the core of every hydraulic system is the hydraulic cylinder. It is the central component on which all hydraulic systems are dependent. Therefore, one must learn rebuilding these cylinders, as it saves money and valuable time. Construction...

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E-OLSS Hydraulic Pump

Introduction. The E-OLSS (Electronic – Open centre Load Sensing System) is an energy saving system to reduce fuel consumption by means of controlling the swash plate angle.  A Variable-displacement swash plate piston pump is used with an OLSS control valve. For this combination to work there is a series of valves mounted on the pump to sense the different machine operating demands Effective Use of Engine Horsepower For optimum out-put of the machine its important for the engine to maintain a set speed. As the load in the hydraulic system changes the discharge amount from the pump needs to be adjusted. The valves mounted on the hydraulic pump that sense the change in working conditions. 1.Servo Valve. 2.CO valve (Cut-Off control) 3.NC valve...

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Fuel control dial Function • The fuel control dial is installed under the monitor panel, and a potentiometer is installed under the knob. The potentiometer shaft is turned by turning the knob. • As the potentiometer shaft is turned, the resistance of the variable resistor in the potentiometer changes and a throttle signal is sent to the engine throttle and pump controller. The hatched area in the graph shown at right is the abnormality detection ar...

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Komatsu Launches New HM400-3 Articulated Truck

Komatsu America Corp. introduces the HM400-3 articulated truck. With a net horsepower of 469 hp (350 kW), the HM400-3 is powered by a Komatsu SAA6D140E-6 engine and is EPA Tier 4 Interim and EU Stage 3B emissions certified. Komatsu leveraged its leadership in technology and innovation—building on its proven Tier 3 engine platform—to design an environmentally friendly engine that increases power while decreasing fuel consumption. Every Komatsu Tier 4 Interim construction machine comes standard with Komatsu CARE™ complimentary factory scheduled maintenance for 2,000 hours or the first three years, and includes two complimentary KDPF exchanges within the first 5 years. The Komatsu CARE program covers all new Komatsu Tier 4 Interim...

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Komatsu Corp. Launches New WA470-7 Wheel Loader

Rolling Meadows, IL, October 15, 2012 — Komatsu America Corp. introduces the WA470-7 wheel loader. With a net horsepower of 272 hp (203 kW), the WA470-7 is powered by a Komatsu SAA6D125E-6 engine and is EPA Tier 4 Interim and EU Stage 3B emission certified. Built upon a proven Tier 3 engine platform, Komatsu has leveraged its leadership in technology and innovation to design a more environmentally-friendly engine that increases power while decreasing fuel consumption by approximately 8 percent, compared to the WA470-6. Weighing in at 52,007 pounds (23,590 kg), the WA470-7 features improved efficiency, lower fuel consumption, improved operator comfort, and enhanced serviceability to maximize productivity while lowering operating...

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Komatsu PC4000 Hydraulic Shovel Offers Reliability and Durability

MINExpo 2012, September 24, 2012 — Komatsu’s PC4000 hydraulic shovel, with an operating weight between 855,500–879,800 lbs. (388-399 M. tons) and a bucket capacity of 29 yd3 (22 m³), is designed with the goal of helping mining customers move more material in less time for reduced costs per ton and increased profits. A powerful Komatsu SDA16V160E-2 diesel engine and four circuit advanced “Hydropilot” hydraulics are two of the major improvements to this model. Blending innovative technology and engineering, Komatsu’s PC4000 stands up to the rugged-use of today’s mining applications. The Komatsu SDA16V160E-2 diesel engine has a rated power of 1875 HP (1400 kW). The shovel’s low engine emission levels meet EPA regulations TIER II...

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