madasaweasel

can anyone tell me how i can check if my brake problems are from
the vacum pump or the servo?
brake pedal goes hard at low/idle revs?

TIA
dave

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Austin Shackles

On or around Mon, 15 Aug 2005 14:49:37 +0100, madasaweasel@mad.co.uk
(madasaweasel) enlightened us thusly:

>can anyone tell me how i can check if my brake problems are from
>the vacum pump or the servo?
>brake pedal goes hard at low/idle revs?

300 TDi vacuum pump is a naff unit and known to fail, also costs about 109
quid to replace, buggrit.
--
Austin Shackles. www.ddol-las.net my opinions are just that
"My centre is giving way, my right is in retreat; situation excellent.
I shall attack. - Marshal Foch (1851 - 1929)

SimonJ

> >can anyone tell me how i can check if my brake problems are from
> >the vacum pump or the servo?
> >brake pedal goes hard at low/idle revs?

Faulty servo, even with the engine switched off, the servo should maintain
enough vacuum to give you a couple of presses before it goes hard.

If it goes hard at idle, it just means the pump cannot keep up with the leak
unless you rev it.

Austin Shackles

On or around Mon, 15 Aug 2005 20:14:16 +0000 (UTC), "SimonJ" <me@mine.net>
enlightened us thusly:

>> >can anyone tell me how i can check if my brake problems are from
>> >the vacum pump or the servo?
>> >brake pedal goes hard at low/idle revs?
>
>Faulty servo, even with the engine switched off, the servo should maintain
>enough vacuum to give you a couple of presses before it goes hard.

good point.
>
>If it goes hard at idle, it just means the pump cannot keep up with the leak
>unless you rev it.

or the pump's on it's last legs. Discos take a LOT of stopping with no
vacuum.

--
Austin Shackles. www.ddol-las.net my opinions are just that
"Nessun maggior dolore che ricordarsi del tempo felice nella miseria"
- Dante Alighieri (1265 - 1321) from Divina Commedia 'Inferno'

madasaweasel

thanks for the reply
when you put it like that it does make sense
he ho its off to john craddocks web site

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