Komatsu D51EXi-24, Operation & Maintenance Manual

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BACK GRADE WORK
Leveling work with the back grade mode is turned on in the fol-
lowing cases.
• When dragging back the remaining soil at the wall side by
traveling in reverse
• When erasing track marks
Select “Simple Grading”.
REMARK
When “Simple Grading” is selected, you cannot set the Smooth
Start and the blade load mode.
1.
Start the blade automatic control and turn on the back grade mode.
For details of the method of selecting the back grade mode, see “HANDLE BACK GRADE MODE”.
2.
Raise the blade with the blade control lever and move forward enough to hold remaining soil at the back of
the blade.
3.
Place the joystick (steering, directional and gear shift lever) in REVERSE position with the decelerator/
brake pedal depressed, and perform LOWER trigger operation.
For LOWER trigger operation method, see “METHOD FOR ACTIVATING AUTOMATIC BLADE CON-
TROL”.
4.
After the blade lowers, start reverse travel by releasing the decelerator/brake pedal slowly.
5.
Hold the remaining soil at the back of the blade, carry it to the place lower than the design surface and track
marks to fill there.
When the load on the blade is excessive, the blade thrusts and the track slips.
Adjust the blade by raising or “floating” the blade with the blade control lever as well.
6.
When remaining soil is excessive, drag some soil back from your side by several times.
(T) Design surface
(V) Remaining soil (W) Obstacles such as walls
When the machine travels in reverse, the blade edge shape is not suitable for dozing.
Use this for finishing leveling when the height difference to the design surface is small.
FINISHING OPERATION OF BANK SOIL
Finishing work of bank soil is the operation to finish the surface of bank.
MACHINE OPERATIONS AND CONTROLS OPERATION
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