fill. When traveling too close to the next scraper, spreadthe load at the far end of the fall.NOTE: Keep the scraper bowl as close to theground as possible to lower its center of gravity and tokeep it upright.SpreadingTechniques for scraper spreading operations are asfollows:l Spread the first load at the start of the fill.l Travel with subsequent loads over the previousfill, provided lifts are small.. Make each following spread start at the end ofthe previous layer.. Finish spreading in one full length before startinga new lane, so rollers can begin compaction.. Route the scrapers to compact the fill. Over-lapping the scraper tire tracks aids in the compaction ofthe entire area and reduces the compaction timenecessary with a roller.l Spread in the highest gear permitted by thecondition of the fill area terrain.NOTE: Slowly discharging loads at low speedslows down production and cycle time.l Do not waste time on the fill. As soon as the loadis spread, get the scraper back on the haul road and returnto the cut. Plan your exit from the fill to avoid softground and detours around trees and other obstacles.. As shown in figure 10-49, make the fill high onthe outside edge. This prevents the scraper from slidingover the outside edge and helps in maintaining accurateslopes to desired heights. When the fill is not made inthis manner, the scraper tends to work away from theedge of the fill, making it hard to maintain the correctslope. In inclement weather, build the low center up fordrainage.SCRAPER SAFETYSafety precautions that apply to scrapers are asfollows:. Never operate a scraper at speeds that are unsafe.. Always wear seat belts. Uneven terrain cancause a violent tilt of the scraper, causing possiblepersonal injury by throwing you off or against thesteering wheel if NOT secured in the operator’s seat.Figure 10-49.-Proper placement of fill material.10-27
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