JHL, the temperature sensor is part # RE503242. I have attached pictures.
I do not know what the cold weather switch is. Maybe this is what you are referencing, on the thermostat housing there is a temperature sensor that is connected to a two wire harness that goes to the injection pump; this is the "cold start advance" portion of the system so it starts easier when cold by advancing the timing.
The temperature sensor is easy to replace. If you are quick changing it, you don't have to drain the coolant, just make sure it's not hot at the time. You will want a pan under the tractor to catch the coolant, so as not too have to clean it up.
Hope this answers your question.
I do not know what the cold weather switch is. Maybe this is what you are referencing, on the thermostat housing there is a temperature sensor that is connected to a two wire harness that goes to the injection pump; this is the "cold start advance" portion of the system so it starts easier when cold by advancing the timing.
The temperature sensor is easy to replace. If you are quick changing it, you don't have to drain the coolant, just make sure it's not hot at the time. You will want a pan under the tractor to catch the coolant, so as not too have to clean it up.
Hope this answers your question.