OTTO Excavator Spare Parts Sk120-2 4Bd1 Thermostat Seat 8944625530 894462-5530 8-94462553-0 For Isuzu This OTTO excavator spare part, the Sk120-2 4Bd1 Thermostat Seat with part number 8944625530, is designed for maintaining and regulating the optimal operating temperature of Isuzu engines.