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Brakes/Hubs Brakes, Hubs, and etc

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post #1 of 6 (permalink) Old 10th September 2016 Thread Starter
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I was happily driving along yesterday in our old 1990 Renault Trafic T1100D camper & noticed the brake pedal seemed to have more travel than usual before the brakes started working & then it seemed to be going right to the floor & altho' the brakes still came on, I needed to use the handbrake too!! No warning light came on. Fortunately it happened near home. I assumed there was a leak somewhere but couldn't see one & the fluid level in the master cylinder seems fine. I'm thinking its either the servo or some sort of internal leak in the master cylinder...can anyone suggest checks I can do to find out what's causing this? If its the master cylinder, has anyone used this kit...
Renault Trafi | eBay ... 485ff8a512
to replace the seals etc...
thnx for any tips on this...
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post #2 of 6 (permalink) Old 10th September 2016
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Re: brakes!!

A servo fault would generally stiffen the brakes, hard pedal but little effect.

Do the brakes stiffen up if the pedal is pumped?
If so I'd be suspicious of a minor leak but one has let air in the system.

If just low on power, long on travel, could be master cylinder or a stuck shoe/pad or adjustment.

Can't discount master cylinder but first the system needs a good looking at
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post #3 of 6 (permalink) Old 10th September 2016
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Re: brakes!!


personally I don't like to advise re brakes, as due to the safety element and not actually seeing the vehicle for my self.

I would suspect the master cylinder but would give the whole system a good wheel off inspection too.

If your mechanical knowledge and expertise is not up to this, for the safety of yourself and others get it looked at by a garage.

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post #4 of 6 (permalink) Old 11th September 2016 Thread Starter
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Re: brakes!!

thnx for the tips etc...I did these checks on the servo...

and all seemed fine...but the weird thing is that the brakes are back to normal now!!...I'll give the wheel cylinders, shoes, calipers & pads a good look over this week & hopefully renew the brake fluid too
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Last edited by Marcas; 11th September 2016 at 10:20 PM.
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post #5 of 6 (permalink) Old 11th September 2016
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Re: brakes!!

Would deffo recommend brake fluid change, it sounds like your brake fluid is failing, and when getting the brakes hot the fluid is not working,,.
Old fluid = water, anything over 5% water, then give your symptoms
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