Caterpillar 621F wheel-tractor scraper is pushed by Cat D6R bull dozer. Dozer blade pushes on rear push block of scraper. Bowl has been lowered so its cutting edge cuts soil, and scraper apron at front of bowl has been lifted. Therefore, the bowl fills with soil as scraper moves with asistance of dozer pushing it forward. The Courtyards private dormitory, North Campus, University of Michigan, Ann Arbor, Michigan. 2007.