HANDLING THE TRAPEZOIDAL BUCKET (EXCEPT PC300, 3OOLC-5 MIGHTY) This bucket is used in sloped ditch digging work in the farm. 1. How to perform excavation Operate the boom, the arm and the bucket to make the line A of the side-plate of the bucket vertical. The guide plate B to check this position is installed beside the bucket pins. Accordingly, hold this plate horizontal when digging. 2. Shape of ditch When the trapezoidal bucket is used, the shape of the ditch is as shown in the diagram. HANDLING THE CLAMSHELL BUCKET (EXCEPT PC300, 3OOLC-5 MIGHTY) This bucket is used for digging and loading in side-ditches or the con- fined spaces.
How to perform excavation Carry out digging work by lowering the boom keeping the clamshell op- ened. Close the bucket while raising the boom gradually. When you begin to dig and find the bucket rotating, do as follows. Extend the bucket cylinder fully and hold, the bucket will soon stop rotating. Make the teeth of the bucket vertical in digging. For safety, always avoid abrupt traveling, swing and stopping. Do not swing the bucket to crush the rock or to cut through soil. Do not use the bucket for hammering or pulling out piles etc. Before leaving the machine, open the bucket and lower it to the ground. Remove the bucket from the arm when transporting the machine. - 82 -