The engine and gearboxes have small electric heater pads attached to them. These are plugged in overnight and the covers help to keep the heat in and the wind and snow out. The heater and hoses blow hot air to help warm things up when it gets really cold. I think it was -35C the morning I took the pictures.
If you have to work on the machine you try and aim the hoses at what you are working on so your hands don't freeze up quite so quick. It sucks when you put a wrench down and pick it up and it freezes to your hands.
Even the synthetic turbine oil gets pretty thick at these temperatures without preheat.
On the plus side no bugs.
"It's no sweat in the arctic"