Author Topic: Brake Booster and Master Cylinder  (Read 20802 times)

ak1234

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Brake Booster and Master Cylinder
« on: April 04, 2009, 02:18:53 »
Does anyone know which brake booster and master are used on the 1988 Autocraft ?  I have to say its a nice slim and compact set up ..I want to use it on my Pantera.
   
   Thanks in advance
   
   Ron

cobham cobra

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Brake Booster and Master Cylinder
« Reply #1 on: April 15, 2009, 11:40:54 »
Hi Ron,
   I suggest you contact Bob Green at http://www.bgdevelopments.co.uk/
   I think I'm right in saying Bob supplied the systems to AC and Autocraft.
   
   Good luck - John.

ANF289

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« Reply #2 on: April 15, 2009, 15:49:20 »
Please let us know what you find out.  Thanks!
   
   
quote:
Originally posted by cobham cobra
   
Hi Ron,
   I suggest you contact Bob Green at http://www.bgdevelopments.co.uk/
   I think I'm right in saying Bob supplied the systems to AC and Autocraft.
   
   Good luck - John.
   

ak1234

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« Reply #3 on: April 17, 2009, 01:03:04 »
I will do that .. yes I seen this site in my search but never emails him ...I will now and let you know.
   
   Ron

jbottini

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« Reply #4 on: April 30, 2009, 20:32:44 »
Ron, please advise me as well, it looks like  need one for my car. jim

dkp_cobra

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« Reply #5 on: May 01, 2009, 17:18:01 »
I would also be interested about the result. The brake master cylinder is from Girling. The number is: G 64679152Q123 X
   
   There exits two different versions: with a 7/8" bore and with 13/16" bore. I have the 7/8". So far I have no idea about the brake booster.
   
   Please post your results here.
   
   @Jim: why do you think you need a new one? Is your brake a little bit too weak? I am asking because I think this brake setup has some room for optimisations.
   
   Regards,
   
   Peter

cobham cobra

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« Reply #6 on: May 01, 2009, 17:54:48 »
FYI - a couple of years ago I had the brake servo or booster removed from my car because I felt the system was over servoed and the front wheels were all too easily locking - even under moderate brake pressure. I had Bob Green Developments modify my system to include a brake balance or bias adjustment dial for front and rear balance. The result is a MUCH harder pedal, but the pedal has much more feel and the car is more settled under braking.
   
   Sometimes I wish I still had a servo but only after I've been driving a modern car for a while.
   Cheers - John.

jbottini

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« Reply #7 on: May 02, 2009, 14:35:45 »
Peter, while I haven't isolated issue, I'm loosing brake fluid at each drive. Have to double pump brake as I'm loosing pressure. Have take wheels off and do visual diagnostics for leaks, but I suspect booster or master based on some drips in garage. Also have 3 wheel brake feel, so I could have a frozen caliper perhaps. My thought is to know where to access booste and master before i send her to the shop. Also looking at having rear wheel bearings packed (at 10,000 miles already) have you done that deed as well? Jim

ak1234

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« Reply #8 on: May 02, 2009, 22:31:47 »
Still no luck ... uncovered my car and found a ford sticker on the booster..searched the e net and not found any that resemble the one in my car .. someone has to know where it came from.
   
   Ron

jbottini

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« Reply #9 on: May 03, 2009, 12:45:03 »
Ron, these bad boys can be rebuilt andperhaps a rebuilder would have one lying arround. If we could find John XXXXXfrom Malta , he might know source. Also two English firms who have MV's as parts are same as I was told. Jim

Mark IV

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« Reply #10 on: May 03, 2009, 13:57:45 »
The booster may be a Ford Granada/Sierra as I recall. There is a rebuilder in the states that can re-do the booster. I can provide the contact info. The master cylinder can be rebuilt or replaced.
   
   If you have the Ford engineering number off the booster, I may be able to cross it to a service part number. That part would not be avilable in the US, but should be good in the UK as an NOS part or as an aftermarket item.

nikbj68

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« Reply #11 on: May 03, 2009, 14:00:21 »
Ron. I would guess that having found a Ford sticker, the part is from a contemporary UK ford model, such as Fiesta,Escort,Sierra,Granada...any chance of an id no stamped anywhere, or a picture so we can have a think about it?

ak1234

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« Reply #12 on: May 03, 2009, 16:07:50 »
Thanks guys I will continue my search ... as I;m not oo familiar witht he UK Ford models I will expand my e net search.  The last resort would be to sned it out for rebuild ... I dont want to loose time in the season driving the car.
   
   Thanks

dkp_cobra

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« Reply #13 on: May 05, 2009, 10:49:03 »
quote:
Originally posted by jbottini
   
Peter, while I haven't isolated issue, I'm loosing brake fluid at each drive. Have to double pump brake as I'm loosing pressure. Have take wheels off and do visual diagnostics for leaks, but I suspect booster or master based on some drips in garage. Also have 3 wheel brake feel, so I could have a frozen caliper perhaps. My thought is to know where to access booste and master before i send her to the shop. Also looking at having rear wheel bearings packed (at 10,000 miles already) have you done that deed as well? Jim
   

   
   Jim,
   
   loosing brake fluid is indeed a sign to repair the master brake cylinder. The rubbers in the cylinder get leaky over time and the brake fluid runs to the booster and leaves through the booster and cylinder. Sometimes the fuid destroys the membrane of the booster.
   
   I haven't changed the rear wheel bearings. They were ok but the shims for setting up the correct rear end were destroyed. I made a new spacer so I could get rid of the shims. Seems to work.
   
   Regards, Peter

jbottini

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« Reply #14 on: May 05, 2009, 14:07:33 »
Peter,
   I'm planning on evaluating brakes this weekend...your observation is in line with mine. As to rear wheel bearings, I need to re-pack, not replace. your experience there could be helpful. do you have more details of that procedure than are on the "rebuilding" site/
   Jim