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Brake pad failure

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V8MoneyPit:
Last weekend at a play day I had the brake pedal go down further than normal. After pumping it, all seemed fine from then on. I thought is was muck getting in a pushing the pads away from the disc. Since then, I've noticed a grinding from the rear brakes. This might be why........



They've only been in 6 months and done less than 5000 miles. Looks like the friction material has parted company from the backing. However, the other inner pad is also near to the metal. The outer pads are more what you would expect from 5000 miles. i.e. hardly worn at all.

The calipers were rebuilt during the rebuild and the pistons are still perfectly good and free as you would expect.

Has anyone else experienced this?

It's an early Disco axle on a 90.

The only thing I can think of is that the drilling across both calipers is blocked. This would account for the inner pad doing all the work.  I didn't split the 2 halves when I rebuilt them but they were flushed out with clean brake fluid.

Axetamer:
My 90 eats pads, I've been to sibbertoft, where its a gritty sandy sort of place, and wrecked both front and back pads, which were new, in less than 4 hours, other places like avon dasset are a bit kinder but still consumes the pads at a frightening rate, I treat them as a consumable and on average only get around 16 hours in the dirt out of a full set, I use mintex front and back with crossdrilled and slotted discs and have stainless pistons in the calipers all round.

I do find that the inners tend to wear quicker than the outers, but I have no backing plates on any of the discs......playing in the dirt can be expensive, but then again when I was into match fishing I'd think nothing of throwing 40 quids worth of bait into a river in 5 hours.... so it horses for courses I suppose

topless matt:
unlucky steve.
I find my inners wear a lot quicker than the outers and that dersingham does tend to eat the pads.
It is possible that as they wore down the sand just abraded what was left so see how you get on with another set, if the same happens again, then id start to wonder  :?

bogie:
The inners always wear first!! I thought it might be down to the direct flow of the fluid and the fact that the pressure hasnt got to work around the caliper????? Interesting to know ???

topless matt:
Inner pads always wear down first because they are less proteceted from the dirt and mud than the outer pads.
The hydraulic action of the pedal should make very minimal difference to contact timing and pressure of the pads on the disc.

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