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I don't have a lathe . . .

. . but I do have an ancient compact tractor!

The power steering ram is connected to the steering arm with the usual ball coupling but with a straight M12 bolt rather than the tapered bolt that you generally find on track rod ends.

Unfortunately the M12 hole in the steering arm has become ovalled causing excessive play.

The steering arm is part of the casting for the front hub and 4WD system and cannot be removed so any repair will have to be in situ.

My first thoughts were to try and drill out and then ream the oval to 18mm and insert a new 12mm id bush but I was wondering if the collective brains on here had a better solution.

Thanks. G

  • Just an update in case you're interested, I bought a set of blacksmith's drills abd successfully drilled out the steering arm to 18mm and fitted the sintered bronze bush.

    There's still too much play in the rose bush so what us the technical term for that component?

    Thanks for your inputs.

  • Good. The bush is snug fit in the arm I hope - now sintered bronze is an oil absorbing metal, and assuming you have oiled it, that implies that the shaft or pintle that runs within it is smooth, hard, and expected to slide or rotate... If you are locking it together as I thought you were going to you do not really need an oil bearing bush, but it will do no harm. So where is the play - between bronze and pintle, between pintle and rose hole, or between rose frame and rose ball ?
    (pintle is just a short stepped shaft or one with either  a thread section or  changes in diameter.)

    Mike

  • Hi Mike, thank you for your continuing interest. I got a sintered bush as it was readily available at the sizes I needed and I thought it wouldn't do any harm. The bush is a snug fit in the steering arm and the bolt is a snug fit in the bush. The play is between the rose ball and the frame. What is the technical term for the rose ball assembly that ends with an M14 rod that screws into the power steering ram? I reckon I need a new one!

  • If I understand you correctly, it would normally be a "track-rod end". Or just a "rose joint".

  • You're right Chris, thanks. I had a quick google and plenty came up although I suspect motor sport standard may be a little over the top for my old banger!

    Having been to a garden party this afternoon I'm a little "tired" tonight so I'll get to it on the morrow.

    Thanks Mike and Chris, your help is much appreciated.