Disco 2 hard brakes

Christhevanman5 · Jul 27, 2020

Hi. Hope someone can help. I have a disco 2 1999 td5. The brakes are are the issue. If u press the brake gently then the seem ok, if you press them hard they dont really do anything. I have replaced the front calipers as the seals had split and they seemed to be pretty seized but still no joy. Any ideas? Thanks

Turboman · Jul 27, 2020

Christhevanman5 said:
Hi. Hope someone can help. I have a disco 2 1999 td5. The brakes are are the issue. If u press the brake gently then the seem ok, if you press them hard they dont really do anything. I have replaced the front calipers as the seals had split and they seemed to be pretty seized but still no joy. Any ideas? Thanks

Most likely a brake servo fault.

Christhevanman5 · Jul 27, 2020

Thanks. Do you know how easy that is to change

Turboman · Jul 27, 2020

Christhevanman5 said:
Thanks. Do you know how easy that is to change

Test it first. Not very familiar with the exact set up, but usually not a bad job to change.

Christhevanman5 · Jul 27, 2020

Will do. I'll have a look at how to test it

Turboman · Jul 27, 2020

Christhevanman5 said:
Will do. I'll have a look at how to test it

Turn the engine off, and pump the brake pedal half a dozen times. Hold the pedal down with your foot, and re-start the engine.
If the servo is working, you will feel the pedal sink down a bit.

Christhevanman5 · Jul 27, 2020

Ok thanks. I'll give that a go

discool · Jul 27, 2020

Christhevanman5 said:
Ok thanks. I'll give that a go

There’s also a non return valve that can give a similar issue on the vacuum supply on the servo, or in the pipe to it , some engines have two, anyway make sure it isn’t sticking so a quick clean and check it opens and closes.

Christhevanman5 · Jul 27, 2020

Hopefully it's something simple like that

kevstar · Jul 27, 2020

The vacuum pump could be at fault, bolted to the alternator.

Christhevanman5 · Jul 27, 2020

Cheers I'll look at that aswell then .

Christhevanman5 · Jul 28, 2020

Had a look at the the car this afternoon and the servo seems to be working. Think I might have found the problem. The pipe that runs from the alternator to the servo has 2 little pipes coming of it . One of the pipes goes to the egr which I blanked, and I think the other one is for the brakes. You can feel it sucking on your finger. That one wasnt connected.

Turboman · Jul 28, 2020

Christhevanman5 said:
Had a look at the the car this afternoon and the servo seems to be working. Think I might have found the problem. The pipe that runs from the alternator to the servo has 2 little pipes coming of it . One of the pipes goes to the egr which I blanked, and I think the other one is for the brakes. You can feel it sucking on your finger. That one wasnt connected.

Thanks for telling us. Always good to know we were in the right ballpark.

ronsealdeath · Jul 28, 2020

Yeah if you have an EGR blank on a td5 you need to blank those EGR lines as they affect brake pressure. A small screw in each tipped in a bit of epoxy will do the trick

Stanleysteamer · Jul 30, 2020

ronsealdeath said:
Yeah if you have an EGR blank on a td5 you need to blank those EGR lines as they affect brake pressure. A small screw in each tipped in a bit of epoxy will do the trick

Should have come with the kit!

Disco 2 hard brakes

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