OTTO Excavator Parts Tcm C240 5137700210 513770-0210 5-13770021-0 Thermostat For Isuzu This is an OTTO excavator thermostat (part numbers: Tcm C240, 5137700210, 513770-0210, 5-13770021-0) designed for Isuzu engines. It regulates coolant flow to maintain optimal engine temperature, ensuring efficient performance and preventing overheating in heavy machinery. A genuine replacement part compatible with specific excavator models.