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John Deere Tractors Discussion Forum
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John Deere 80

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Apollo Norske

10-11-2006 20:14:24




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Is the crank on the 80 the same as an 820 or 830? How did they get more horses out of the latter series than the 80 with the same displacement? Thanks for any info.




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Glen in TX

10-11-2006 23:33:43




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 Re: John Deere 80 in reply to Apollo Norske, 10-11-2006 20:14:24  
You can find more info on them at these two links...
johnnypopper.com and



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buickanddeere

10-11-2006 20:59:10




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 Re: John Deere 80 in reply to Apollo Norske, 10-11-2006 20:14:24  
Piston cup size/shape change, 13mm pumps instead of 10mm. 6 hole injectors instead of five. This allows the fuel to be injected over a shorter period of time. The connecting rods were strengthened early in the model 80 production. There's more but it's too late to find the parts CD tonight to refresh the memory. The 840 also used the blackdash 820 & 830 engine. Some people claim they were built with a beefier crank made form a more durable alloy?

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