The M was John Deere"s first model of the Dubuque line and along with the rest of the letter series until late 1951(?) used the thermo-siphon cooling system with out a water pump. the "M" series of tractors always had a tendency to run some what hot. The temp gauge is in the top water pipe where the water is the hottest. A loose fan belt, plugged radiator fins or unmixed coolant will all contribute to this system running hot since it depends on the principle of hot water rising and cooler water sinking to the bottom. This is aided by a copper finned radiator core that transfers heat rapidly and if all is working right these tractors still ran on the upper end of the temp scale just before hot.
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Today's Featured Article - Restoration Story: 1964 JD 2010 Dsl - Part 2 - by Jim Nielsen. Despite having to disassemble the majority of my John Deere 2010's diesel engine, I was still hopeful I could leave the engine-complete with crankshaft and camshaft-in the tractor. This would make the whole engine rebuild job much easier-and much less expensive! I soon found however, that the #4 conrod bearing had disintegrated, taking with it chunks of the crankshaft journal. As a resul
... [Read Article]
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