How do you change thermostat on 3176 caterpillar?

To change the thermostat on a Caterpillar 3176 engine, first, ensure the engine is cool and disconnect the battery. Next, drain the coolant from the radiator and remove any necessary components to access the thermostat housing. Unscrew the housing, take out the old thermostat, and clean the surfaces before installing the new thermostat, ensuring it is oriented correctly. Finally, reassemble everything, refill the coolant, and check for leaks.