... PU series pontoon undercarriages that range from PU100 to PU240 to fit to the upper part of 8-24ton ... design mounting frame for connection of upperstructure and undercarriage.1.PU240 pontoon undercarriage for amphibious excavators2. Doosan travel motor, 3 ... chains 3. ISO9001 Certified Manufacturer PU240 pontoon undercarriage for amphibious excavators, 3 chains track, fit to ...