These systems generally consist of a GIS/GPS-based vehicle tracking system and the associated mapping display software. GIS, or Geographic Information System, provides the treechippershredder mapping component. With the tracker devices installed in vehicles, dispatchers can follow a vehicle''s location in real-time. When an incident occurs, controllers can quickly dispatch the vehicle nearest to the incident.In the El Paso Fire Department, for instance, the GPS-powered automatic vehicle locator system tracks the location of the department''s apparatus treechippershredder fleet. This system consists of a radio and a GPS receiver/transceiver affixed to each fire apparatus. A signal from the GPS unit is transmitted to a satellite, the signal bounces back to earth, and treechippershredder the radio system tells the computer system exactly where that unit is on a map to within one meter of accuracy.

While the new units are an evolution of gen-sets Magnum had previously built for United Rentals and other customers, "these are totally new packages," said Roberts. "They have a totally new design of corrosion-resistant aluminum enclosure with our own enhanced digital controller."There are 11 models treechippershredder in the range, all powered by liquid-cooled diesel engines, which drive Marathon brushless treechippershredder alternators. The MMG12 (12 kW) and MMG25 (21 kW) are powered by Isuzu three- and four-cylinder naturally aspirated treechippershredder engines. The rest of the line, powered by four- and six-cylinder John Deere turbocharged diesel engines, includes the MMG50 (43 kW), MMG70 (62 kW), MMG85 (76 kW), MMG110 (96 kW), MMG125 (108 kW), MMG155 (135 kW), MMG180 (155 kW), MMG230 (201 kW) and MMG425 (371 kW. All of the engine packages include cooling systems from Diesel Radiator, Enginaire air cleaners and Nelson treechippershredder exhaust systems.

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