Hi there, i am new to the tractor world. We recently bought an acreage and there was a MM m670 diesel that had been parked for years that came with the place. I got it running, and runs real good in the summer. Now that the weather is getting colder here up in Northern Canada, i am having troubles getting it started. The tractor has two block heaters, which both work, the one gets way hotter than the other, are these parts still available? My main question here today is there some kind of glow plugs on these motors? I cant find any. Believe the tractor is a late 60s model, the key only has the off position, on, and start. You can turn the key to the left to activate any sort of glow plugs. But right by the key ignition, I have this little button, that says 15 amp on it i believe. I was thinking this was my glow plug button? I definitely dont see any type of glow plugs in the engine bay but i am very new to tractors and new to diesels too. I just got my first diesel truck 2 months ago. Any help on this glow plug situation would be awesome. Even in the summer, a shot of ether gets it started unless i want to crank on it for ten minutes. Tractor has a front end loader, and loving it. thanks in advance