Capital Equipment News June 2016

COVER STORY

the moisture from the fuel. A large capacity forced air cleaner removes over 99% of airborne particles, reducing the risk of engine contamination and also extending the intervals for cartridge changes. Glass fibre filter technology in the main oil return filter ensures effective protection of the hydraulic system. This series has been designed for easy maintenance and reduced downtime. A PC monitoring function enables connection to the e-POS system. Various parameters can be checked during maintenance, including pump pressure, engine rotation and engine speed. This information can be stored and printed for analysis. Easy access to all components, including the engine oil filter, radiators and grouped grease inlets, enables quick maintenance procedures and prevents contamination to the surrounding environment. The fuse box is located in the storage compartment behind the seat, which is a clean environment, with convenient access. Doosan’s DX340LCA machines have been designed with the latest ergonomics for enhanced efficiency, improved safety and greater comfort. New features include a spacious, all weather sound-suppressed cab with a clear all round view, effective air conditioning and an adjustable seat, with an optional air suspension system to reduce vibrations. The control panel is conveniently positioned for easy use and is simple to read. For improved safety, there are large handrails and a wide step with anti-slip plates, right and left rear view mirrors, a travel alarm and safety glass. Control levers ensure safe and precise operation during levelling procedures, movement of suspended loads and tricky manoeuvres. Electrical buttons integrated on the levers are used to activate the power boost function and to operate additional equipment, like grabs, crushers and grippers. An emergency throttle cable, which controls engine speed manually in the event of a malfunction of the control dial, is mounted in the cab. Doosan earthmoving equipment – which encompasses track, wheel and mini excavators, articulated dump trucks (ADTs), as well as wheel loaders and various attachments – has been designed to cope efficiently and safely in Africa’s harsh operating conditions. b

limit stresses. The lateral chassis is welded and rigidly attached to the undercarriage. Tracks are composed of sealed, self- lubricating links, which are isolated from external contamination for dependability in all conditions. These tracks are locked by mechanically bolted pins and the integrated track spring and idler are joined directly for high durability and easy maintenance. Track links have reinforced thickness on stressed regions and the hydraulic track adjuster has a shock absorbing tension mechanism. Each track is driven by an independent, high torque, axial piston motor through a planetary reduction gear. Two levers or a foot pedal control provide smooth travel and counter rotation. For optimum excavator control, the new e-POS system (Electronic Power Optimising System) provides a perfect synchronised communication link between the engine’s electronic control unit and the hydraulic system. A controller area network system facilitates a constant flow of information between the engine and hydraulic system, ensuring power is delivered exactly as it is needed. Advantages of the new user-friendly e-POS system include ease of operation, the availability of power and standard modes for optimum efficiency under all conditions and an automatic auto-idle mode for fuel saving.

Regulation and precise control of the flow rate required by the equipment is standard and a self-diagnosis function enables technical problems to be resolved quickly. Maintenance and oil change intervals can be displayed and an operational memory provides a graphic display of the status of the machine. The choice between standard and power operating modes optimises performance in all conditions, including harsh environments. Standard mode uses 88% engine power for general work and power mode uses 100% engine power for heavy tasks. In economy mode, the machine uses 76% engine power. An advanced hydraulic circuit separates the oil flow for travel and boom functions to allow precise and safe operation when handling loads during travel. Circuits for the boom, arm and bucket have been improved to ensure smoother and precise control. New control valves and joystick valves ensure speedy, smooth and responsive controls. The main hydraulic pump has a capacity of 2 x 274 ℓ/min reducing cycle time, while a high capacity gear pump improves pilot line efficiency. Efficient filtration is achieved by the use of multiple filters, including a fuel pre- filter fitted with a water separator that protects the engine by removing most of

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CAPITAL EQUIPMENT NEWS JUNE 2016