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#1 2019-08-07 15:07:00

jiminwatford
Member
Registered: 2019-08-07
Posts: 6

Front brakes locking after master cylinder change

2006 Scudo hdi

I had a soft pedal and osr and nsf wheels had locked up

So I have replaced the master cylinder

I bled the cylinder then bled the brakes

For the first couple of miles they're fine but then the fronts begin to bind

If I loosen the front most brake line in the cylinder they free off but lock up again in a mile or so

I think I've read that the rod going into the back of the cylinder may not be retracting or needs adjusting?

I'm not sure and I am a bit stuck now

Btw I'm so pleased I've found this place. I've had loads of these vans over the years and hopefully I can carry on

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#2 2019-08-07 15:15:13

Casper
Member
From: East Lothian
Registered: 2015-12-20
Posts: 1,334

Re: Front brakes locking after master cylinder change

Ill watch this with interest as need to change mine soon however, if yours were fine before i.e no binding caliper then i would be looking at the push rod also. Was it brand new or new to you or it it possible there was an upgrade M/S at some point and you have the wrong one?

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#3 2019-08-07 15:32:53

jiminwatford
Member
Registered: 2019-08-07
Posts: 6

Re: Front brakes locking after master cylinder change

The master cylinder was a slightly different shape but I put that down to being a different manufacturer. It all lined up ok. Is the rod in the back adjustable?

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#4 2019-08-08 11:32:19

vaz2121
Member
From: SW. Scotland
Registered: 2015-08-31
Posts: 600

Re: Front brakes locking after master cylinder change

Just a thought ........... This is not some thing silly like it's come off an Non HDI engined van to a HDI or Vice versa ................ I've fell into this  kind of trap before

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#5 2019-08-08 13:01:51

jiminwatford
Member
Registered: 2019-08-07
Posts: 6

Re: Front brakes locking after master cylinder change

Hmm, I've just looked back at the listing and the only Scudo listed is the 1.9D but it lists the hdi 110hp for the Expert/Dispatch/Ulysses


https://www.ebay.co.uk/itm/Motaquip-Bra … ect=mobile

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#6 2019-08-08 18:11:49

vaz2121
Member
From: SW. Scotland
Registered: 2015-08-31
Posts: 600

Re: Front brakes locking after master cylinder change

I could be very wrong ............ but as i say in the  past all be it wasn't on one of these where the part fitted but had a subtle difference where it worked but just not  correctly enough 

Is there any markings or part number on original item that could  cross reference on the listings OEM numbers or new item to your vehicle etc...........

Does a Scudo VIN  work on Citroen Sevice box as they are all built in same plant

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#7 2019-08-09 09:30:18

k_wyndham_t
Member
Registered: 2018-06-01
Posts: 60

Re: Front brakes locking after master cylinder change

Does sound like rod in too far into the cylinder as it needs to back off a certain distance for the pressure to release.

I dont know if adjustable on these vans, never looked TBH

Last edited by k_wyndham_t (2019-08-09 09:33:36)

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#8 2019-08-17 23:01:07

jiminwatford
Member
Registered: 2019-08-07
Posts: 6

Re: Front brakes locking after master cylinder change

I've thinking about my next move

We isolated the problem to too much pressure in the master cylinder, we think caused by the pin not retracting fully

To get to the pivot points the engine needs lowering and this is where I've run out of time and interest. Quite a few other things need sorting for the MOT so this is where the van meets its end

So if anyone needs some parts from a silver Scudo let me know

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#9 2019-08-17 23:52:21

Casper
Member
From: East Lothian
Registered: 2015-12-20
Posts: 1,334

Re: Front brakes locking after master cylinder change

jiminwatford wrote:

So if anyone needs some parts from a silver Scudo let me know

Was your M/C new and came with a new reservoir? If so i will have that to start with and if it does differ or fooked at least the reservoir should be fine as this is my main issue.

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#10 Yesterday 01:33:20

jiminwatford
Member
Registered: 2019-08-07
Posts: 6

Re: Front brakes locking after master cylinder change

So as not to turn this into a for sale as I have sent you an email

James

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