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Morooka track carrier
The all-rounder for extreme applications. Crawler dumpers of the MST series from the Japanese manufacturer Morooka are used in difficult and extremely wet areas. The design of a Morooka track transporter has hardly changed since the development of the first Morooka dumper.
A robust, self-supporting steel frame consists of two axial square steel tubes and two crossbars arranged in a right angle that are the matrix of the frame.
The carriage and its components are welded with a very robust tube-steel construction at both transverse joints of the base frames.
The design of a Morooka traction drive is similar to that of a crawler excavator. The housing of a Morooka travel engine is out of cast steel. This traction drive contains a unit of gears (planet drives) that provide the power transmission. The actual hydraulic driving motor (hydraulic piston engine) is fixed with high strength screws at the transmission unit. A gear shaft provides the connection between driving engine and gearbox. The power transmission is done by an alignment of different gear wheels with different diameters (transmission ratio) from the hydraulic motor over the gearbox to the sprocket and the rubber track. The Morooka track carrier engine is installed between the main frame at the front of the track carrier and its alignment crosses the driving direction in the middle of the track crawler. The design of the engine and its aggregates is as follows: starter, generator, turbo charger, oil cooler, water cooler, fuel tank.
The Diesel engine of a Morooka crawler transporter is in the main frame of the track crawler. This position allows that the centre of mass of the dumper is deep and has sufficient distance to the ground. Water cooler and oil cooler are mounted in front of the engine so that sufficient cooling is given. The fuel tank and oil tank are mounted separately at the right vehicle frame by screw joints. The obstructed hydraulic pumps in a Morooka dumper are for the drive (double piston pump) and are series connected. For the equipment, that means for the lifting and lowering of the dumper hutch, a gear pump is used. The mounted hutch of the track carrier is built up similar to the crawler dumper. The connection parts between the hutch and the track carrier are bolted and mounted with plain bearing bushes. Hydraulic cylinders (double action) allow the tilting of the loaded crawler hatches to the back – not sideways! Platform gates of the mounted hatch are welding constructions that cannot be removed. The crawler track of a Morooka track carrier has huge rubber tracks. When constructing the Morooka dumper, the rubber tracks were chosen regarding size and structure so that the ground pressure remains as low as possible and the tracks have a longer durability despite high speeds and stresses by stones, water and contamination.
The cabins of the Morooka transporter are convenient and robust. Operator manual, replacement book and CE marking are included in the delivery of a standard track carrier. The engines of a Morooka dumper may have different manufacturers, depending on their size. Manufacturers for Diesel engines
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