Page 17 - Cat Motor Grader Application Guide AEGQ0947-00

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The most frequently used method of sod disposal is to cut it, then spread it over the existing roadway to reshape and build up road height.

Cut the sod when moisture is present and cut it as thinly as possible to keep down the bulk. When spreading sod, work at a very steep blade angle to reduce bunching and dragging under the cutting edge, which creates holes in the surface. Do not attempt to smooth this layer beyond shaping the road. Then wheel roll it or use a disc and compacting equipment to obtain as much compaction as possible. When wheel rolling an area with the motor grader, offset the rear to obtain a wider compaction pass. Use material from the ditch and backslope to cover the sod as deeply as possible. Use this material to finish shaping and grading the road to its desired dimensions. In many cases sod and other material will be brought onto the road surface windrowed, then loaded out and transported to a waste area.

In areas where small amounts of sod must be moved and sufficient space is available on the ROW (right of way), the sod can be deposited on the road backslope or, in some cases, moved completely off the ROW. On narrow ROWs where the motor grader cannot operate on the backslope, use the high bank position to place small amounts of sod on the backslope.

Placing the moldboard toe near the front tire allows sod and other material to be cast up the slope, keeping it off the road travel surface.

C A U T I O N

When using this moldboard position, visibility to the toe is restricted. Use caution to prevent moldboard-front tire contact that could cause tire damage.

If the road has a good cover of gravel or crushed rock, loosen the material with a ripper/scarifier or by cutting with the moldboard.

1. Stockpile the good cover material by windrowing it to the opposite side of the road, away from the first ditch that you intend to cut or clean 2. Cut or clean the first ditch, placing the excavated material on the shoulder. Spread the excavated material evenly across the uncovered lane, placing it from the shoulder up to the centerline of the road. You will be spreading the excavated material in the lane from where you first removed the good cover material.

3. Windrow the stockpiled cover material back across the road, placing it on top of the excavated material that was spread. Leave this material in a stockpiled windrow.

4. Be sure to retrieve any good cover material that was under the original stockpiled windrow and add it to the stockpiled windrow. 5. Cut or clean the second ditch and spread the excavated material evenly across the uncovered lane. 6. Now spread the stockpiled cover material across both lanes evenly.

7. Use the cover material to finish the appropriate road cross section.

N O T E

This is a time-consuming technique, but since gravel and crushed rock are not readily available in some areas, it can be cost-effective.

M S E R I E S M O T O R G R A D E R S A P P L I C A T I O N G U I D E

15

a. 1st Ditch, b. 2nd Ditch

Page 17 - Cat Motor Grader Application Guide AEGQ0947-00

This is a SEO version of Cat Motor Grader Application Guide AEGQ0947-00. Click here to view full version

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