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disintergrating brake pads ... ?

General Tech Talk

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Guy
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disintergrating brake pads ... ?

Post by Guy »

A month and a half ago ( roughly ) I had a bit of a noise from the front end of the Paj, rumbling sound, was on a sunday morn, So I pulled it down to take a look..

big chunk missing from the passanger side inner brake pad ... could not figure out the brand, had no idea how old they were so I got some new ones (the rest of the pad looked fine and had about 2/3rds of the friction materlal left on it )

So I got some new pads and (bendix 4wd ones .. with titanum stripe) and has not given me any issues since.

fast forward to saturday .. was working for a friend at a wedding (doing some bar work) was about 120k trip each way, almost there I hear a clunk from the drivers side rear .. stopped had a quick look, could not see anything so continued on ...

on the way home (1am ish) I hear a familiar rumble .. bloody pad has fallen to bits .. they were DBA pads on the back and appeared to be quite new when I checked em (after the front had an issue)
Due to the disance home I had to continue driving and have buggerd the disk surface a bit ( new disk is not to bad bout $100)

Now can anyone give me a reason for pads to fall apart like that .. apart from a manufacturing fault ?
I have no idea how old the were as they were on the vehicle when I purchased it in June. The other three pads are in good nic and less than half worn. I could see they were DBA brand on the rear, and the right part for the vehicle ..

The front I put down to just a "shit happens" type arrangement but for the rear to do it as well ... (inner pad again)
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Post by Bumpy45 »

Why not get in touch with DBA and ask them the question.
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Post by lay80n »

Pads can crumble if they get WAY hotter than their designed opperational temp range. Is there a chance that the slides on the calipers (i think the paj's have slide style calipers :oops: ) are sticking you may have hte pad jamed up against the rotor, causing it to wear and overheat.

Layto....
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Guy
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Post by Guy »

lay80n wrote:Pads can crumble if they get WAY hotter than their designed opperational temp range. Is there a chance that the slides on the calipers (i think the paj's have slide style calipers :oops: ) are sticking you may have hte pad jamed up against the rotor, causing it to wear and overheat.

Layto....
Yep that is a possability, the front rotor did not apper to have any hotspotting on it and I didnt pay alot of attention at the time .. just did the same things I normally do when replacing pad ( clean pins etc check piston blah blah blah) But on the rear I did notice the lower pins on both sides were very sticky and a bit of a bugger to remove. The one that had fallen apart on the rear to a good 20mins to remove the one pin.

I cleaned the gunk off em (and the "tube" in whick they slide with a bit of parts cleaner and a tiny bottle brush thing ) Lighty lubed em up with a high temp copper based spray lube ..

You may well be onto something .. Thanks Layto.
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Post by GUtripper »

Could just be poor bonding material gluing the pad material to the backing plate. I had that issue once on an XB, (pad fell apart just as you described) and it turned out it was a bad batch, thats all.
They were replaced for free.

Re above post, I thought brake pins should only have a special brake lube applied.... is that the copper based stuff you used?
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Guy
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Post by Guy »

Yes the spray is suitable for use on brake pins ( according to wurth )
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