OTTO Excavator Parts Nfw220 4Bd1 Thermostat Shell 5137130350 513713-0350 5-13713035-0 For Isuzu OTTO Excavator Parts Thermostat Shell (NFW220 4BD1) - Part Numbers: 5137130350, 513713-0350, 5-13713035-0. Compatible with Isuzu engines, ensures proper coolant flow and temperature regulation in excavators. Durable OEM-quality replacement component.