OTTO Excavator Spare Parts Ex120-5 4Bg1T Thermostat Seat 8943104910 894310-4910 8-94310491-0 For Isuzu This OTTO Excavator Spare Part, the Ex120-5 4Bg1T Thermostat Seat with part number 8943104910, is crucial for regulating the optimal operating temperature for Isuzu engines.