Preload

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ianhateswork
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Preload

Post by ianhateswork »

Hi all,
I am just about to set the preload on my rear hubs but thought i would ask if i am doing right.
No lb/in device, so i am using a weighted 1 foot tube. I divided 1lb/in by twelve and then to grams (38g) for ease,
If it takes 150g to overcome the resistance of the seals, do i simply add 38g to the 150 and tighten the nut till rotational movement stops or do i need to find another way.

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anybody needing m20 x 150 nuts 27mm socket, i found http://www.euro4x4parts.com/parts/ selling them for one euro each and even with the 9 euro postage they were still much cheeper. just enter PCE1037 or equivalent 90179-20061


old new and the free m20x1.5 that is so close but not
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bash
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Re: Preload

Post by bash »

I did it in a very similar way, and still dont know if I was right or not, but, every time I tightened up a small amount as I was approaching the "correct" torque I span the hub a few times to relieve any sticktion,and this seems to work. But, Ive done a few of these now (hate the job) and every time after a couple of hundred miles they need retightening. I thought it was me that was doing this wrong but I know others that have done the same. How did I adjust them after that.... I just tightened it until the play had gone and they have been ok since so Im beginning to think the original method is 'operation overkill'. What does anyone else think.

Bash
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Pete Boole
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Re: Preload

Post by Pete Boole »

I agree entirely Bash - I rebuilt my rear bearings with exceptional care and they still needed nipping up after a couple of hundred miles. It would be nice if someone offered a properly engineered solution.

Pete

v8 fou
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Re: Preload

Post by v8 fou »

I would say using a high quality torque wrench would be the answer, like I did on mine with no further tightening needed.

bash
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Re: Preload

Post by bash »

I used a very expensive Snapon one the last time but still got the same result, but there is a loose nut in the system.....me.

Bash
You are only young once but you can be juvenile all your life !!

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ianhateswork
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Re: Preload

Post by ianhateswork »

Thanks for the advice, can carry on now.
It may be that a little touch and feel is the properly engineered solution.

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