OTTO Excavator Spare Parts Sk60 4Jb1 Thermostat Seat 8944288120 894428-8120 8-94428812-0 For Isuzu This OTTO Excavator Spare Part, the Sk60 4Jb1 Thermostat Seat with part number 8944288120, is designed for Isuzu engines to regulate the operating temperature efficiently.