... PU100 to PU240 to fit to the upper part of 8-24ton normal excavators, e.g. Caterpillar, Hitachi, JCB, Volvo, ... . In this case, customers could easily change their normal excavator to swamp excavator. Customers are better to provide us with sizes of ... chains 3. ISO9001 Certified Manufacturer PU200 pontoon undercarriage for amphibious excavator, 3 chains track, fit to 18-20ton normal excavators, ...