1. HEAVY EQUIPMENT 2. CRAWLER EXCAVATORS 3. DROTT 4. (35YC) - DROTT SERIES-B CRAWLER EXCAVATOR (1/69-12/77) Section (35YC) - DROTT SERIES-B CRAWLER EXCAVATOR (1/69-12/77) Case: (00) - GENERAL (01) - ENGINE (02) - FUEL SYSTEM (04) - UNDERCARRIAGE (05) - UPPERSTRUCTURE CHASSIS (06) - ELECTRICAL SYSTEMS (07) - HYDRAULIC SYSTEM (09) - BOOMS (19) - BUCKETS parts diagram catalog sale online construction equipment excavator tractor Truck sale: