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Subject: NAA

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Jim Foster    Posted 11-29-2019 at 05:09:49 [URL] [DELETE]        [Reply] [Email]  
  • NAA
  • oil leak from the steering box on my NAA Left side pitman arm what kind of job is this to replace seals

    Ultradog MN    Posted 11-30-2019 at 06:10:52 [URL] [DELETE]        [Reply] [No Email]  
  • Re: NAA
  • Those steering boxes are very, very simple mechanisms.
    Ford used the same basic idea from the late 8Ns all the way through the 1980s on some models. And the bottom of the box, including the ball nut, sector shafts, etc was the same, even on the models with power steering.
    That's not to say an 8N box will fit a 600 or 3000 but the simplicity is the same.
    If you just want to replace one sector seal that should not be hard. Remove the steering arm and pry out the old seal.
    Those sector seals are small flimsy things and very easy to ruin when installing. I made a seal driver on my friend's lathe out of a piece of pipe to push them in.
    Even a piece of plastic pipe would work fine as they don't take much to tap in. Cut the pipe so it's longer than your sector shaft so you can tap on the end.
    Getting the steering arm off is easy enough. I use a two jaw puller and heat. Even a propane torch with Mapp gas will provide enough heat. With medium pressure on the puller, heat it to a couple hundred degrees and it will pop off.
    I would say on a scale of 1 - 10 with 1 being changing the oil and 10 being a full transmission overhaul that job is about a 1.5
    One cautionary note: Be careful around your fuel tank with the torch. Make sure you dont have a leaky carb, etc.
    The volatility of gas is just another reason I am increasingly liking diesels.
    Good luck. The job is very easy.

    Tim Daley(MI)    Posted 11-29-2019 at 16:21:59 [URL] [DELETE]        [Reply] [No Email]  
  • Re: NAA
  • Jim-
    I'm not certain as I've never done an NAA steering box but, I think, they share a lot of later 8N steering box parts, arm for one so retainer and seals are the same. See the LINK from our 'HOW-TO's' forum for some more help. Asked if the leak was bad, but did you pour oil down the steering shaft? That isn't the way to lube it. The steering box rebuild is a big, time consuming project simply because there are so many other parts that need to be removed first to do it right. The steering wheel, hood, grille, gas tank, and wiring, dog legs, headlights, all need to come off before you even get to removing the steering box.

    Tim Daley(MI)

    Jim    Posted 11-29-2019 at 10:17:48 [URL] [DELETE]        [Reply] [Email]  
  • Re: NAA
  • How bad is the leak? Maybe you can cheat with Cornhead grease?

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