I recently purchased a used 2007 M9540 from a John Deere dealer and have not received the Operators manual yet. The tractor was originally purchased in Canada. I am not familiar with diesel engines. I have tried a few different ignition positions and get no indication that the glow plugs are activated. I have called a couple of the local Kubota dealers with no satisfactory answers. I have successfully started the tractor at temperatures down to about 6 degrees F after plugging in the tank heater for about an hour. What is the correct sequence for cold weather starting of the 2007 Kubota M9540 tractor?