Komatsu GD555-5 Operation & Maintenance Manual page 183

OPERATION OPERATION
6. Operate the power tilt so that the top of the blade is slightly in
front of the cutting edge, then start operation.
7. Discharge the soil to the side to prevent any excessive load
from bearing on the machine.
8. Spread fine crushed loose soil over the ground surface until it is level.
REMARK
Generally speaking, carry out operations on flat ground with the frame straight to the blade. Articulate the frame
to deal with the force in the side direction caused by the load on the blade.
If the tires start to spin, turn the blade to a greater angle to reduce the digging width, thereby reducing the load
on the machine.
In leveling operations, discharge the soil outside the rear wheels. This makes it easier to steer with the rear
wheels.
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OPERATION OPERATION