New brake pads won't fit?

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michaelh712
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New brake pads won't fit?

Post by michaelh712 » Sat Nov 08, 2008 6:42 pm

OK, I'm sure I'm missing something simple here, so I appeal to the experience of the board.
I replaced a rear hub seal on my 712 (no problem) and needed to replace the rear shoes as well. New shoes (EI) went on one side no problem, but on the other side I couldn't get the drum on. I camfered the leading edge of the new shoes, with a little better luck, but I'd have to pound the drum on then the wheel would not turn whatever I did.
- Not the adjuster, as I had it all the way loose
- Not the cylinder, as it was adjusted all the way in
- Checked the old shoe with the new and they are identical, except for the new lining of course
- Checked, re-checked and checked again the installation of the different parts, and every time they are installed perfectly.

WHAT AM I MISSING?

Thanks,
Michael
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Jim LaGuardia
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Post by Jim LaGuardia » Sat Nov 08, 2008 10:15 pm

Are the shoes on in the right direction? Could also be a stuck wheel cylinder not retracting :wink:
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michaelh712
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Post by michaelh712 » Sun Nov 09, 2008 9:02 am

Wheel cylinder not stuck and moves freely. Pads assembled according to photos in the repair book; tab towards the cylinder, notch holding the adjuster nut facing upwards.
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ExpeditionImports
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Post by ExpeditionImports » Sun Nov 09, 2008 9:05 am

Hi Guys,

Measure your drum diameter and your shoe thickness. Then compare to the manual. My guess is that your one drum has been turned and the other has not. If you only ordered shoes and not drums, then you would have been supplied with the thicker linings expecting the drum to be turned for the brake job.

Cheers,

Scott Ingham
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Post by michaelh712 » Sun Nov 09, 2008 11:19 am

Thanks Scott, makes sense. Yes, I did just order new shoes from EI, and the drum is a year old, but has never been turned.
What do I need to do to have the drum "turned"? Take the drum and pads to a machine shop? What should I ask for; never done this before.
thanks
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ka
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Post by ka » Sun Nov 09, 2008 9:04 pm

seems weird to have to turn a new drum to fit new pads that are designed for each other. is that normal?
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Post by mjnims » Sun Nov 09, 2008 9:47 pm

I take the shoes to a shop locally and have them relined. The first set I had made to fit a used drum. We have to take a little off the ends of the pads (small amount to match the inside drum radius) with a belt sander to get them to fit the newer drums. Now I have the pads fitted by the brake shop to an average drum and they have all been fitting nicely.
Mike

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Post by michaelh712 » Sat Nov 15, 2008 6:50 am

Oh yes, the old belt sander trick; worked like a charm.
The new pads had more material closer to the ends of the pads and taking some off did the trick.

Thanks Mike!
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Douwe
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Post by Douwe » Sat Nov 15, 2008 9:18 pm

I guess that's why I think its a good idea to bring both the shoes and the drums to a shop to have the shoes relined and to make sure that the radii of the shoes and drums match.

The braking power is already not that good, so I want to make sure I get the maximum performance out of the system.

-Douwe

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