2010年9月28日 · The most important aspect of road maintenance is providing good drainage. It starts with the road crown in straight sections and super elevation in curves. A straight road's wear surface should rise toward the centerline ¼- to ½-inch per horizontal foot, or about a 3 percent slope from the shoulder to the center of the road.

2012年7月31日 · Although exact details of its invention are lost to history, the road drag actually predated the grader. Invented when parties unknown first used a timber dragged by beasts of burden to smooth the ground, the road drag was produced into the 1920s, and the only major changes to its design were the addition of a metal cutting edge, larger size ...

2012年5月31日 · The pull grader was the standard machine for road maintenance from the mid-1800s until motor graders rendered them obsolete in the 1930s, and several elements factored into their design: Drawbar. The drawbar conveyed the pulling power from the stock or tractor that moves the machine to the blade.

2010年9月28日 · From 1954, Allis-Chalmers' compact-grader customers were given the option of diesel or gasoline power. A diesel engine of 50 horsepower was selected from the newly acquired Buda Co. to install in the diesel machine. Known as the model DD, it weighed 9,350 pounds, and top speed was boosted to 25 mph.

2018年11月27日 · The 250-horsepower Cat 140 motor grader has an operating weight of 42,325 pounds with a 12-foot moldboard. The direct-drive power-shift transmission provides 8 Forward and 6 Reverse speeds, and an all-wheel-drive system is optional.

2020年3月14日 · The SANY SMG200C-8 motor grader weighs in at 45,107 pounds, uses a 253-horsepower Cummins diesel engine, has an eight-speed transmission, is equipped with a 14-foot moldboard,... Motor Graders Caterpillar 150 AWD Motor Grader

2022年8月16日 · Although motor grader design has evolved considerably since 1931, the basic concepts of the Auto Patrol are the standard of today’s graders. About the HCEA The Historical Construction Equipment Association (HCEA) is a 501(c)3 nonprofit organization dedicated to preserving the history of the construction, dredging, and surface mining equipment ...

2010年9月28日 · It took a crew of two to operate the grader outfit, a tractor operator and a grader operator who stood on a simple "stand" at the rear of the machine. Because hand control was tiresome and could be dangerous when the blade hit a solid object, Russell offered power controls by the early 1920s with a small gasoline engine providing the power.

2010年9月28日 · Champion Road Machinery and its predecessor companies had been one of the oldest in the grader industry, building pull-type graders in Canada since 1892. The company had even earlier American roots going back to 1875 when Samuel Pennock of Kennett Square, Pa., patented a two-wheeled grader for pulling behind a team of horses.

2018年3月30日 · The grader uses a Cat C27 engine that prolongs target rebuild life by 33 percent over the C18 engine. Net power range is 535 to 694 horsepower. The 21-inch, 6-speed planetary transmission and improved rear axle bevel gear and final drive extend lower powertrain service life by up to 33 percent. Caterpillar 24 Motor Grader Specs. Engine: Cat C27 ...