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post #1 of 5 (permalink) Old 08-15-05, 08:01 AM
madasaweasel
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300tdi defender brake problems

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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post #2 of 5 (permalink) Old 08-15-05, 03:01 PM
Austin Shackles
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Re: 300tdi defender brake problems

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)
 
post #3 of 5 (permalink) Old 08-15-05, 03:01 PM
SimonJ
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Re: 300tdi defender brake problems

> >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.


 
post #4 of 5 (permalink) Old 08-15-05, 04:03 PM
Austin Shackles
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Re: 300tdi defender brake problems

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'
 
post #5 of 5 (permalink) Old 08-15-05, 04:03 PM
madasaweasel
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Re: 300tdi defender brake problems

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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