LEGO Technic Crawler Dozer Bulldozer Building/Construction Toy 42028 Lego Technic Crawler Dozer Bulldozer Building/Construction Toy 42028. Bulldozer measures over 5" (13cm) high, 11" (29cm) long and 6" (16cm) wide. Push heavy loads with the massive blade. Operate the super-powerful ripper and maneuver over rugged terrain with the wide caterpillar tracks. 2-in-1 model: rebuilds into a Trench Digger.