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I don't have a lathe . . .

Grumpy

. . 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

Parents

  • The ball of the 'rose' joint is the only moving part, and it moves within the body of the rose joint. The pintle should not rotate within the ball nor within the steering arm (hence my comment about tack welds in the field.). 

    This is surprisingly hard to explain in words. Sketch coming, but not quickly.

    EDIT sketch 1, the naming of the beast. lower washer or top hat sets rose ball height and means ram arm comes in level and un-strained.  safety washer ensures steering action not totally lost if ball ever pops from frame. All yellow parts move as one. Unless ram arm miles off parallel so optimum ball height varies during turn and then a rising pintle is needed.

    Mike.

  • in reply to mapj1

    Thank you very much Mike, your "sketch" is somewhat better than my pencil drawing on the back of an invoice! And I think I have finally got my thick head around it. I've ordered a new bush so I'll mic it up when it's been in the freezer and drill appropriately!

    Next problem, I suspect the clutch is slipping!

    I'll report back just in case anyone is remotely interested!

    Thanks again for you help, I had completely misunderstood how the rose joint worked.

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  • in reply to mapj1

    Thank you very much Mike, your "sketch" is somewhat better than my pencil drawing on the back of an invoice! And I think I have finally got my thick head around it. I've ordered a new bush so I'll mic it up when it's been in the freezer and drill appropriately!

    Next problem, I suspect the clutch is slipping!

    I'll report back just in case anyone is remotely interested!

    Thanks again for you help, I had completely misunderstood how the rose joint worked.

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