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John Deere Tractors Discussion Forum
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Re: replacing generator belt on John Deere 420 U tractor

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Author  [Modern View]

02-10-2013 11:04:53

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Really? Can't be that hard. Look at the generator and belt. Find the pivot point of genny loosen it up. Then loosen the clamp bolt of genny. Push in on genny loosening belt. Remove old belt. Install new belt. Pull genny back to tighten belt. Tighten clamp bolt and mounting bolt. Your done.

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Jake Winn

02-11-2013 16:42:27

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 Re: replacing generator belt on John Deere 420 U tractor in reply to husker44a, 02-10-2013 11:04:53  
It isnt that easy. There are two belts. One from the crank to the water pump pulley and then the generator belt is behind that one. I agree taking the hood, grill and radiator off is the best way to do it. Gives you the most room and access to the water pump. That belt is adjusted by turning the adjusting ring on the front of the water pump. This is also the front half of the pulley. Do them both while you are there. Check the water pump out closely too. Make sure the bearing and seal are in good condition, not leaking and smooth spinning.


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02-10-2013 11:21:51

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 Re: replacing generator belt on John Deere 420 U tractor in reply to husker44a, 02-10-2013 11:04:53  
My hazy recollection is that I removed the screws holding the fan shroud to the radiator. This let me move it back, and work the fan belt forward to get the generator belt through

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