Komatsu GD555-5 Operation & Maintenance Manual page 197

OPERATION OPERATION
7. Lean the front wheels to the left. Dig the second V-groove (2)
at the same depth or slightly deeper than the first V-groove (1).
8. Dig the flat bottom. Set the right blade lift cylinder to the desired
depth.
9. Operate the left blade lift cylinder as required.
10. Set the front right tire at the bottom of the first V-ditch and start
the operation.
11. Set the right edge of the blade at the bottom of the slope.
12. Lower the right blade lift cylinder so that the tip of the blade is
the set precision for the ditch.
13. Lower the left lift cylinder to the desired digging depth. Lean the
front wheels to the left.
14. Set the blade at an acute angle and push up the soil to the top of the ditch slope.
15. Spread the windrow and finish to the final precision.
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OPERATION OPERATION