12. OPERATION 12.14 WORK POSSIBLE USING HYDRAULIC EXCAVATOR In addition to the following, it is possible to further increase the range of applications by using various attachments. 12.14.1 BACKHOE WORK When condition of the machine is as shown in the diagram at right, each cylinders maximum pushing excavation force is obtained when the bucket cylinder and link, arm cylinder and arm are at 90 o . When excavating, use this angle effectively to optimise your work efficiency. The range for excavating with the arm is from a 45 o angle away from the machine to a 30 o toward the machine.
There may be some differences depending on the excavation depth, but try to use within the above range rather than going all the way to the extreme end of the cylinder stroke. 12.14.2 SHOVEL WORK A shovel is suitable for excavating at a position higher than the machine. Shovel work is performed by attaching the bucket in the reverse direction. 12.14.3 DITCHING WORK Ditching work can be performed efficiently by attaching a bucket to match the width of the ditch and then setting the tracks parallel to the line of the ditch to be excavated. To excavate a wide ditch, first dig out both sides and then finally remove the center portion.
12.14.4 LOADING WORK In places where the swing angle is small, work efficiency can be enhanced by locating the dump truck in a place easily visible to the operator. Loading is easier and capacity greater if you begin from the front of the dump truck body than if loading is done from the side. PC450-ENG 2-73