Systems Features and Basic Operation

2.Find an area to be graded that is close to specified grade. Start the skid steer or tractor, engage the auxiliary hydraulics and move the unit to that location. Manually raise or lower the Laser Grading Box’s cutting edge until it is even with the bottom of the mea- suring pole when the Rod Eye is emitting the “On Grade” tone or resting on the ground if already at grade.

3.Making sure the automatic control system is set to manual and the deadband tolerance is at its minimum, move the Laser Sensor to a height on the mast pole where it indicates the beam is in the “On Grade” position and is unobstructed by any object.

Operation

After the Laser Grading Box is connected and the automatic control system is calibrated, operation can begin.

The operational goal is to drive over the area to be graded with the box 1/2 full of material and the Control Panel’s Green Light always illuminated.

1.When seated in the Operator’s seat, start the skid steer or tractor and set the automatic control system to operating in automatic mode.

2.If equipped, set the deadband tolerance to a large value.

NOTE: Most materials graded must later be com- pacted. To compensate for the compacting distance, lower the Laser Sensor. This raises the box’s cutting edge by the same distance. The distance the Laser Sensor is lowered will depend on the material.

3.Drive the machine forward or reverse (The Para-Level Grading Box has front and rear cutting edges). The automatic control system constantly senses the plane of laser light

to maintain the cutting edge of the box at the required elevation. Note the following during operation:

•In some situations, the automatic control system may require a cut deeper than the machine can handle. The machine may lose traction, stall the engine, or the wheel frame will be lifted off the ground to the maximum stroke of the cylinder as the cutting edge tries to reach finished grade. If this occurs, set the Auto/Manual Switch to MANUAL and use the Raise/Lower Switch to raise the cutting edge until the machine can push the material. Make multiple passes to cut the area to closer to finished grade and then go back to AUTO control. This allows the high spots to be gradually removed.

NOTE: In rough grading situations, the automatic control system can usually operate as an “Indicate Only” system and the machine controlled manually. After the area is rough graded, return to automatic control.

4.After several passes with the Laser Grading Box, stop and turn off the skid steer or trac- tor. Place the base of the measuring pole on the graded area check grade elevation.

5.After a rough grade is achieved, reduce the deadband tolerance to meet the job tolerance requirements. With a tighter deadband, the speed of the skid steer or tractor must be decreased for optimum finish.