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Chapter 10 Graders and Scrapers
Frame

Equipment Operator Basic - Beginning construction equipment operators manual
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Prime Mover wheel at a time. Having the capability to operate in this manner,  one  rear  wheel  can  raise  or  lower,  while  the The  prime  mover  is  a  rubber-tired  tractor, other remains on the same level with the front wheels power-driven by a four- or six-cylinder diesel engine thereby holding the grader on a level terrain (fig. 10-2). mounted at the rear. The prime mover has four-rear This is a very important feature. If the rest of the grader mounted single tires driven in tandem drive through does not rise and fall when working uneven terrain, the gears and chains and a single-steering axle. grader blade does not vary its elevation, as the grader TANDEM  DRIVE.—  The tandem drive of the passes  over  its  work. grader allows climbing over rocks, logs, or humps, and ARTICULATED FRAME STEERING.—  Some permits passing through depressions or ditches one graders have frames that are hinged just forward of the Figure  10-2.—Tandem  drive. Figure  10-3.—Articulated  grader. 10-2







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