28-02-2013, 10:50 AM
Scrapers
Scrapers.ppt (Size: 2.35 MB / Downloads: 30)
Excavating, loading, hauling, & dumping over medium distances.
Can be used with pusher tractor for increased production.
Some models have self loading capabilities
Types of Scrapers
Push-Loaded: Single Powered Axle
Scraper Push-Loading Example
Problem
The estimated cycle time for a wheeled scraper is 6.5 min.
Calculate the number of pushers required to serve a fleet of nine scrapers using pushers.
Determine the result for both backtrack and chain loading methods.
Scraper Job Management
Downhill Loading
Chain or Shuttle Loading Methods
Use Rippers to Loosen Hard Soils
Have Pushers Give Scrapers Adequate Boost to Accelerate Units Out of Cut.
Keep Cut in Good Condition
Maintain Haul Roads
Keep Fill Surface Smooth and Compacted
Boost Scrapers on Fill