If you worked on as many 400 & 450's with 6 volt systems as I have you would put it on 12 volts in a minute. They wouldn't start coming right off the train when they were new. IH didn't help matters by using aluminum cables some times and that long cable has a lot of voltage drop even when new. Then throw in the dumb place they put the ground cable. The problem isn't getting them started when it is cold, it when the engine is warmed up good. Then things are sealed up good and it is really difficult to turn them over. I go for the 12 volt starter as well as staying with the 6 volt on them slams that ring gear really hard. The 450 is when they changed to 12 volt in middle of production and they still were positive ground in case any one is wondering.
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Today's Featured Article - History of the Nuffield Tractor: Conclusion - by Anthony West. In the last piece I mentioned that Nuffield had reached the stage where they had chosen to drop the "Universal" from production. The two new models were given three figure numbers, instead of "three" and "four". Model numbers were introduced to help farmers and dealers instantly recognize the engine size and horsepower of the tractor, the 4/60 had a four cylinder diesel engine which developed 60 bhp at 2,000 rpm. The 3/42 had a 3 cylinder diesel engine which produced 42 bhp at 2,000 rpm. Th
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