Crawler dozer fundamentals

A bulldozer is a tracked machine designed mainly for pushing, spreading and rough grading material. Theory includes blade types, track systems, traction, slope awareness, visibility, ground conditions and environmental controls. Components include blade, push arms, track shoes, rollers, idlers, sprockets, ripper and final drives. Safe work principles: understand slope and edge hazards; avoid sudden changes of direction on unstable ground; inspect tracks and blade components; maintain a clear view; keep people outside the work zone. Knowledge check: What is the role of the blade? Name common track system components.