OTTO Excavator Parts Tcm C240 Thermostat Shell 5137130300 513713-0300 5-13713030-0 For Isuzu OTTO Excavator Parts Thermostat Shell (TCM C240) - Part Numbers: 5137130300, 513713-0300, 5-13713030-0. Compatible with Isuzu engines, regulates coolant flow for optimal engine temperature. Durable OEM-grade replacement part.