Trucks and heavy equipment Heavy Equipment Inspection of all excavators: Caterpillar, Komatsu, Foton, Doosan, Chinese. Inspection of all loaders: Caterpillar, Komatsu, Foton, Doosan, Chinese. Inspection of all bulldozers: Caterpillar, Komatsu, Foton. Inspection of graders: Caterpillar, Komatsu, Foton. Inspection of generators: Caterpillar, Cummins, Perkins.