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Subject: 8N 12 volt Alternator misalignment

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Clifford Campo    Posted 10-08-2021 at 04:47:19 [URL] [DELETE]        [Reply] [Email]  
  • 8N 12 volt Alternator misalignment
  • My 1949 8N was converted to 12 volt by the previous owner. The alternator sits too far forward and the drive belt is misaligned. There is no way to move it back where it mounts to the governor housing. The alternator is a Delco-Remy 10SI model. I suspect the wrong part number alternator was put on this tractor. Is there a different 12 volt alternator used for the front mount distributor engine (mine) and the later side mounted distributor? What part number should I get? Currently my drive belt is riding too close for comfort to the spark plug wires and boots on the distributor due to the misalignment.

    JMOR    Posted 10-08-2021 at 10:57:48 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N 12 volt Alternator misalignment
  • Since that tractor came from factory with a generator, there is no "proper alternator part number" for that tractor. Alignment is a function of brackets and belt pulley used and distributor clearance can be affected by belt length also.

    McNugget    Posted 10-08-2021 at 09:57:20 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N 12 volt Alternator misalignment
  • I mounted a smaller alternator, I think it was typically used for a Chevy S-10 or something like that in the 1980's, on my front mount 2N. I made the brackets from angle iron and flat stock and pieces of the tensioning system from the generator. I can send more details if you contact me.

    To move forward with what you have I suggest keeping the alternator, since it is very common and I assume working, and buying a mounting kit. Here's a suggestion: Just 8Ns Part Number 8NE10305.

    Good luck!

    Cliff SC    Posted 10-08-2021 at 13:27:49 [URL] [DELETE]        [Reply] [Email]  
  • 8N Alternator misalignment
  • Thanks McNugget. Yes the alternator works great, no issues there. Just that the lower mounting boss, where the unit pivots, is too wide and forces the whole alternator forward causing the misalignment.

    CC

    Dead eye Dave    Posted 10-08-2021 at 05:09:45 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N 12 volt Alternator misalignment
  • I bought a kit to change my side mount tractor (1952) to 12 volt. It came with all the proper parts to make the changes necessary. Everything lined up perfectly. Possibly the prior owner forged ahead on his own without proper parts? Good luck. Dave

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