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Subject: Ford 8N fan blade

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Matthew    Posted 06-06-2020 at 18:51:11 [URL] [DELETE]        [Reply] [Email]  
  • Ford 8N fan blade
  • I got a new radiator and shroud but when mounted fan will hit on the shroud. Thinking of trimming the fan blades about a quarter inch so it won't hit.
    Think it will work out ok?
    Thanks for your response.

    Tim Daley(MI)    Posted 06-08-2020 at 04:21:18 [URL] [DELETE]        [Reply] [No Email]  
  • A few more things to check is the water pump. If bearing is worn and there is any wobble present, that may be causing interference. You only have so much you can do with the radiator as far as proper fit and height with pads. Rad neck needs to allow proper cap fit as well. I had an aftermarket rad that caused the cap to scrape on the hood as it was too short. Check water pump, rebuild if needed -there are kits at JUST8Ns.Also, did you try the OEM shroud with the new rad?

    Tim Daley(MI)

    Matt    Posted 06-08-2020 at 17:45:20 [URL] [DELETE]        [Reply] [Email]  
  • The shroud on it is pretty bad shape. Cut up and bent around.
    It didn't have much space around it either.

    Gaspump    Posted 06-07-2020 at 13:28:59 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Ford 8N fan blade
  • Why not raise or lower the shroud to clear the fan, quick and easy fix unless it the parts are of poor quality and won't fit. On original N assembly the shroud was positioned to the fan and then fastened.

    Matt    Posted 06-07-2020 at 13:57:27 [URL] [DELETE]        [Reply] [Email]  
  • Re: Ford 8N fan blade
  • Yeah I'll get the radiator tightened up then see about adjusting it to the fan. There are slots to move it roughly 3/8 of an inch so I may get it to clear. Thanks

    Tim Daley(MI)    Posted 06-07-2020 at 07:17:24 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Ford 8N fan blade
  • If radiator rubber supports are not correct or missing and/or radiator is tilted as mentioned, the fan shroud may interfere. I highly recommend to leave the fan blades alone and if you can't get it to work with the shroud, just yank it off and leave alone ALL 9N's never used a fan shroud and worked just fine. They were supposed to be for more suction to direct warm air flow towards the operator in cold weather. I found only aftermarket units caused interference.

    Tim Daley(MI)

    Ultradog MN    Posted 06-07-2020 at 10:21:27 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Ford 8N fan blade
  • Hi Tim,
    So 9Ns did not have a shroud?
    Learn something new every day here.
    When was the change made?
    As for trimming or grinding the blades, I don't understand the reluctance to do that here.
    I don't think I've ever seen a fan that wasn't bent and/or out of balance - sometimes pretty severely.
    Yet I've never seen a post that discusses tweaking/straightening one - least of all in the manner I described below which may not make them perfect but they are better balanced than before. Do others balance their fans? How do they do it?
    I don't think grinding one will make it much out of balance. Surely not as bad as most fans I've seen.
    As I said below, I prefer having a fan shroud, for the reasons I listed and for originality.
    I too did as Jmor mentioned below; Spent a day of aggravation trying to get a fan to stop rubbing the shroud. Finally gave up and ground a little off the blades. An hour later shroud was on and all was good.

    Ultradog MN    Posted 06-07-2020 at 04:38:17 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Ford 8N fan blade
  • Some thoughts about grinding blades:
    Call me goofy if you wish but I always try to balance my fan blades
    While the radiator is off it is easy to take a ruler and measure from the timing cover to the front edge of each blade. Bend any that are way off as required.
    You can get fancy about it if you wish. Measure them at the top off each blade, bottom of the blade, front edge and rear edge. Find a happy medium and set them all the same. Easy to twist a blade if needed with a cresent wrench at the base.
    You'd be surprised at how far most fans are out of whack.
    I have no qualms about grinding my fan blades. About 1/16" is all they ever need. I scribe them first then grind them all the same. Dress them with a file after grinding to prevent very sharp edges.
    I always reinstall the fan shroud. Maybe they will cool just fine without it but I like the shroud - for looks, for safety and for better cooling.
    EVERY Ford tractor - from 1939-1999 had a fan shroud when it left the factory.
    For what it's worth I balanced the fan and ground the blades on this tractor just yesterday. Installed the radiator, fan and shroud for what I hope is the final time. This model Ford has an extra metal band that extends the shroud back about 4" farther than normal. The 6 blade fan and that 4" extension were all whacked out. But sphincter boy here spent a little time and got it all right.
    What's not to like about that?

    PS, I'm hoping to start the engine on this tractor soon. That ugly upper radiator hose is temporary and will get replaced.

    Matt    Posted 06-07-2020 at 13:42:27 [URL] [DELETE]        [Reply] [Email]  
  • Re: Ford 8N fan blade
  • Sounds good Thanks

    carlintexas    Posted 06-06-2020 at 21:55:34 [URL] [DELETE]        [Reply] [Email]  
  • Re: Ford 8N fan blade
  • I would take the shroud off before I would cut on those blades might get them out of balance. My 8n hasn't had a shroud on it the 37yrs I'v owned it and never gets hot even in this Texas heat.

    JMOR    Posted 06-06-2020 at 21:47:26 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Ford 8N fan blade
  • Shroud beat me up for over a day. Anyone can have it for postage! Grrrrrrrrrrrrrrrrrrrr!!!!!!!!!!!!!!!!!!!!!
    P.S. tractors run fine in Texas heat without 'em.

    Matt    Posted 06-06-2020 at 23:55:32 [URL] [DELETE]        [Reply] [Email]  
  • Re: Ford 8N fan blade
  • I guess that would be a good solution to the problem.
    I'll keep that in mind.

    Bruce(VA)    Posted 06-06-2020 at 20:22:20 [URL] [DELETE]        [Reply] [Email]  
  • Re: Ford 8N fan blade
  • The last thing I would do is mess with the fan.

    You have one or two likely causes as suggested by John:

    " One question, is the radiator mount rubber bushings thicker or thinner than original? Also, is the radiator leaning for ward or rearward from perpendicular?"

    Matt    Posted 06-06-2020 at 20:45:13 [URL] [DELETE]        [Reply] [Email]  
  • Re: Ford 8N fan blade
  • There was no rubber mounts bolted straight to the frame.
    I'll tighten it up tomorrow and see how it sits and see what or if there is clearance.

    John in Mich    Posted 06-06-2020 at 19:53:05 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Ford 8N fan blade
  • Your situation is not unusual. There have been many shrouds removed because of the problem you describe. I have fought many shrouds trying to get clearence to the fan. You could shorten the fan blades without serious impact.
    One question, is the radiator mount rubber bushings thicker or thinner than original?
    Also, is the radiator leaning for ward or rearward from perpendicular? It doesn't take much to be out of alignment.

    Matt    Posted 06-06-2020 at 20:30:32 [URL] [DELETE]        [Reply] [Email]  
  • Re: Ford 8N fan blade
  • It still had the original radiator in it and it bolts directly from the bottom through the base. The new one is The new one has carridge bolt slots in it instead of straight up bolts threaded in. When I set it in place ( haven't tightened it yet) holding it and spinning the fan it scrapes shroud. I'll see about tightening it up tomorrow and see how it works. I was thinking about trimming the blades before tightening it just so I don't have to take it back off to do blades anyway.

    Jack - Iowa    Posted 06-07-2020 at 07:19:11 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Ford 8N fan blade
  • I bought an aftermarket radiator for my 860. Had a similar problem with the shroud. Some work with a ball peen hammer to shape it around the lower hose connection cured the problem.

    What ever works for you.

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