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Can A Rear Pto Hub Be "straightened"?

Discussion in 'Flat Fender Tech' started by fesser, May 22, 2018.

  1. May 22, 2018
    fesser

    fesser Napa, CA 2024 Sponsor 2022 Sponsor

    Napa, CA
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    Recently acquired a CJ2a with a rear pto and belt pulley hub. When we got the jeep started we ran the pto for a bit and there was a noticeable wobble at the belt pulley. Turning it by hand and using only my eyeballs (no dial indicator) it looks like the wobble is at the pulley, not a bent shaft, although I could be wrong. The difference in the runout, looking at the inside edge and then outside edge of the pulley seems to be about the same, maybe 3/8"s of an inch. If the pulley was bent at the hub somehow, can a machine shop straighten it?
     
  2. May 22, 2018
    Daryl

    Daryl Sponsor

    Bonney Lake, WA
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    Tread very carefully. Better to have a really cool static display then to have a broken paperweight. Is there enough material to clean it up on a lathe?
     
  3. May 22, 2018
    fesser

    fesser Napa, CA 2024 Sponsor 2022 Sponsor

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    Don't know yet. Haven't even knocked the grease and grime off. Was hoping to look at brakes today.
     
  4. May 22, 2018
    SoCalNickG

    SoCalNickG Member 2023 Sponsor 2022 Sponsor

    Whittier, CA.
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    I know nothing about these hubs but I am curious. Are these hubs machined steel or cast iron?
     
  5. May 22, 2018
    fesser

    fesser Napa, CA 2024 Sponsor 2022 Sponsor

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    I am actually not sure. It is so dirty and rusty and I only looked at a for a few minutes. I am leaning toward cast from what I did see.
     
  6. May 22, 2018
    TIm E

    TIm E Aggressively average

    NW Arkansas
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    Cast doesn't bend very well...that may help determine the material or source of wobble.
     
  7. May 22, 2018
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Get it clean before you go nuts. It might be something really simple, if you look.
     
  8. May 22, 2018
    jeeper50

    jeeper50 jeeps 'till I die

    Spanish Fort. AL
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    The drum is cast iron, not sure how to straighten a bent mounting flange on the drum, bet it would have to be heated and massaged back into shape. Much study and recommendations needed here. Hitup the other jeep forums and old tractor forums and see what they recommend. Bet the PO backed into something
     

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  9. May 22, 2018
    45es

    45es Active Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Naches, WA
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    Calling garage gnome. He should have some insight .
     
  10. May 22, 2018
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Me, I'd locate a replacement before I got out the BFH.

    Generic belt pulleys ought to be common enough.

    Or maybe get the OD re-turned??? Do it in place with a belt sander!:sneak:
     
  11. May 23, 2018
    garage gnome

    garage gnome ECJ5 welder

    Western MA
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    I know guys have straightened pulleys and flywheels on stationary engines.

    Before doing anything, get a dial indicator and determine exactly what is bent. If its the shaft, that is easy to straighten on a press.
     
  12. May 23, 2018
    garage gnome

    garage gnome ECJ5 welder

    Western MA
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  13. May 23, 2018
    jeeper50

    jeeper50 jeeps 'till I die

    Spanish Fort. AL
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    :bananatool:That's some funny crap right there!!! I'll check Walmart for ya!
     
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  14. May 23, 2018
    fesser

    fesser Napa, CA 2024 Sponsor 2022 Sponsor

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    No "spokes" on this one. Six holes in the wheel portion which I think (based on very little google information) means it was possibly a Willys part as opposed to a generic tractor part. I guess it would help if I loaded a picture or two.
     
  15. May 23, 2018
    fesser

    fesser Napa, CA 2024 Sponsor 2022 Sponsor

    Napa, CA
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    [​IMG]
    [​IMG]
    [​IMG]
    Obviously this doesn't show the wobble, but at least people will know what the parts are that I am dealing with.
     
    ITLKSEZ likes this.
  16. May 24, 2018
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Liberty Lake, WA
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    I'd pull that thing off and verify that it's the hub that's bent and not the shaft. I'm having a hard time believing the hub would bend without breaking.
     
    cadwelder and fhoehle like this.
  17. May 24, 2018
    fhoehle

    fhoehle Sponsor

    Harford Township, PA
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    I believe it would be the shaft also. Dollars to donuts it’s the shaft itself.
     
  18. May 24, 2018
    fhoehle

    fhoehle Sponsor

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    Also, the tires in the back of the Jeep are cool.
     
  19. May 24, 2018
    fesser

    fesser Napa, CA 2024 Sponsor 2022 Sponsor

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    Yeah, they are. The Jeep came with five original rims that were pulled off in the 80's in favor of the ones that are on it in the picture. The tire in the back with the "V" tread pattern is a Goodyear Hi Miler.
    I hope you guys are right. I think that would be an easier repair.
     
  20. May 24, 2018
    jeeper50

    jeeper50 jeeps 'till I die

    Spanish Fort. AL
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    I would measure the runout first and post it here and then pull it off to see if the shaft it bent.
     
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