Front hub oddity

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Chet
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Front hub oddity

Post by Chet » Tue Jan 09, 2018 7:31 am

Dismantling continues to be a voyage of discovery of oddities. Latest is one front hub which has washers between the hub and brake disc. Would this be a bodge to centre the disc in the caliper and is it acceptable practice?
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Front hub oddity

Post by efi_sprintgte » Tue Jan 09, 2018 8:36 am

Yep it’s a bodge to move the disc over. Imho isn’t acceptable to use.


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Front hub oddity

Post by willholderogri » Tue Jan 09, 2018 8:41 am

its a bodge I would change it


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Front hub oddity

Post by Coupe Racing » Tue Jan 09, 2018 10:07 am

Wouldn’t be surprised if brake judder was a historic issue too


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Front hub oddity

Post by peter freeman » Tue Jan 09, 2018 10:20 am

Easier to space the callipers.



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Front hub oddity

Post by Chet » Thu Jan 11, 2018 4:20 am

My inclination also. However, UIMM spacing calipers is a one-way option - ie to move the caliper in relative to the disc. Shimming the disc moves it in relative to the caliper - the opposite effect. To achieve the equivalent would require machining metal off the fitting faces of the caliper lugs. Or maybe machine the fitting surfaces on the caliper plate? Or both? Too many options here - my head is hurting!



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Front hub oddity

Post by b.c.flat hat » Thu Jan 11, 2018 10:03 am

Those washers move the disc inwards towards the centre of the car. The spacers under the caliper lugs move the caliper the same way.
Reliant used the spacers to centre the caliper over the disc so pads would fit correctly. They seem to be about 15 thou thick. Needless to say, to get the bolt through the locking tab, bracket on the splash protector, caliper stub, spacer and start in the attachment bracket with out cross-threading it or the spacer falling out, clinking on the floor and rolling away to the nearest storm drain(just far enough away for your futile attempts of recovery to result in skinned knees and a bang on the head!)



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Front hub oddity

Post by gtcse8 » Sun Jan 14, 2018 12:23 pm

Ha Ha Brian, you should have kept your hat on, Fred Dibnah used his for everything inc toileting I wouldn't be surprised.

Either A blob of grease, rattle can adhesive or contact adhesive comes in handy when shimming out the calipers and keeping the parts in place.

Same with rocker cover gaskets, just glue them into the rocker covers, simples.


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Front hub oddity

Post by Datsundrew » Sun Jan 14, 2018 1:54 pm

I had to shim my caliper out on my se6 when I put it back together, but I'm sure there were none on it when I pulled it apart. Without, 1 rubbed, and 1 was close, and the new pads wouldn't fit. I guess the mix of new bearings and pads made the difference?



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Front hub oddity

Post by Roger Pennington » Sun Jan 14, 2018 3:36 pm

Datsundrew wrote:
Sun Jan 14, 2018 1:54 pm
I had to shim my caliper out on my se6 when I put it back together, but I'm sure there were none on it when I pulled it apart. Without, 1 rubbed, and 1 was close, and the new pads wouldn't fit. I guess the mix of new bearings and pads made the difference?
It's fairly normal to need shims to make the caliper absolutely central. Bear in mind though, that with old, part-worn pads you can get away with a lot - in your case the shims may have been lost when the calipers were taken off and refitted with worn pads, sometime in the past, and whoever did it couldn't be bothered to re-fit them?


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Front hub oddity

Post by Datsundrew » Sun Jan 14, 2018 4:43 pm

Yes, I’m sure you’re right there Roger, mine has definitely been apart by a lot of people as I found doing the rebuilding there were lots of bits that were odd or didn’t match etc. Worn pads did fit, as I tried them when trying to fathom out why the new ones wouldn’t, then realised that the disc wasn’t central to the calliper.



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Front hub oddity

Post by Chet » Sat Jan 27, 2018 7:24 am

Some trial fitting of both hubs uncovered the problem - and hopefully offered a solution. The caliper mounting plate lugs were bent (can't imagine how) and a PO must have decided 4 washers between hub and disc were an easier fix than straightening the mounting plate. A little gentle persuasion and grinding have restored the mounting plate shape and dimensions, so all should be well.



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