Gradall, used by Pennsylvania on its New York Div in ditch cleaning and light ditch construction, is truck mounted machine consisting essentially of full revolving frame supporting telescoping boom with digging bucket attached at outer end; all movements of machine, except travel, are controlled hydraulically from operator's cab on revolving frame: travel of unit, at road speeds up to 45 mph, is controlled from driver's seat of truck.
Versatile machine aids in ditching work
Ry Eng Maintenance
Railway Engineering and Maintenance ; 45 , n 7
1949
2 pages
Aufsatz (Zeitschrift)
Englisch
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Ditching, drainage and dirty work
IuD Bahn | 2004
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