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shell27
Joined: 30 Nov 2007 Posts: 26
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Posted: Fri Jun 13, 2008 6:09 pm Post subject: The front brakes on my 1938 Sunbeam come on |
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I have a 1938 Sunbeam Talbot 4 litre and just recently the front brake come on gentley until they are on solid, once they are on solid I can let a small amount of fluid out of the bleed nipple and then everything is fine for another 2 or 3 miles, can anyone help with this prob |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22449 Location: UK
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47p2
Joined: 24 Nov 2007 Posts: 2009 Location: Glasgow
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Posted: Fri Jun 13, 2008 7:07 pm Post subject: |
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If the fluid hasn't been changed for a number of years it might have water in it. This would cause it to heat up and expand quickly when driving along _________________ ROVER
One of Britain's Fine Cars |
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pigtin
Joined: 23 Nov 2007 Posts: 1879 Location: Herne Bay
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Posted: Fri Jun 13, 2008 7:53 pm Post subject: |
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Just had the same problem with my special after fitting a modified master cylinder. I had not left any slack in the linkage from the pedal, and a weak spring was allowing the pedal to move slightly, pumping up the system over a few miles. May be worth a check, make sure the plunger is not held in by the slightest amount and there is free pedal movement before it connects. |
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Kaybee
Joined: 27 Dec 2007 Posts: 147 Location: Croydon, Victoria, Australia
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Posted: Fri Jun 13, 2008 11:00 pm Post subject: |
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...and if it's not pedal clearance as Pigtin said, then you better have the master cylinder rebuilt....blocked compensating port or swelled rubbers I'd suggest, cheers, Col. _________________ If it's old...it's good ! |
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shell27
Joined: 30 Nov 2007 Posts: 26
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Posted: Sat Jun 14, 2008 9:31 am Post subject: Hi Col |
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Kaybee wrote: | ...and if it's not pedal clearance as Pigtin said, then you better have the master cylinder rebuilt....blocked compensating port or swelled rubbers I'd suggest, cheers, Col. | are you saying that the rubbers within the master cylinder are going home.thanks shell27 |
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pigtin
Joined: 23 Nov 2007 Posts: 1879 Location: Herne Bay
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Posted: Sat Jun 14, 2008 11:07 am Post subject: |
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Just had a look in the books and it would appear that if anything stops the master cylinder piston from returning to it's fully expanded position it blocks the bypass aperture. That was the problem on mine.
Don. |
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shell27
Joined: 30 Nov 2007 Posts: 26
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Posted: Sun Jun 15, 2008 3:45 pm Post subject: Thanks to 47p2 |
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Thanks for the help people, it looks if it has been solved by changing the fluid which I have done today and I have took it for a test drive and so far so good. Shell27 |
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