Komatsu GD555-5 Operation & Maintenance Manual page 196

OPERATION
FLAT-BOTTOMED DITCH
If there is no V-groove, make a V-groove at depth (A) of the
flat-bottomed ditch. The slope of the road shoulder must be flatter
than usual.
1. Operate the power tilt and angle the blade to the front.
2. Operate the drawbar shift cylinder and set the circle fully to the
left of the machine.
3. Place the front right tire in the bottom of the V-ditch.
4. Set the blade so that the right edge of the blade comes to the
inside of the front right tire at the width of the flat-bottomed
ditch.
5. Operate the right blade lift cylinder to lower the right end of the
blade, and set it to the digging depth.
6. Operate the left blade lift cylinder to raise the right end of the
blade, and set it to the desired angle for the slope face of the
road shoulder.
OPERATION
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