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Brake fluids and other myths
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Penman



Joined: 23 Nov 2007
Posts: 4861
Location: Swindon, Wilts.

PostPosted: Fri Nov 30, 2012 8:38 pm    Post subject: Brake fluids and other myths Reply with quote

hi
The question on the Morris board reminded me about the times when Lockheed and Girling claimed (endorsed by car makers in their handbooks) that only their fluid would work properly in their systems.

And then one of the companies had a strike and rather than lose car production one of the car makers (I think it was Vauxhall) bought some components from the other supplier and actuall sold cars with hybrid hydraulic systems. ie Griling Master cyl and Lockheed wheel cyl or viceversa.
It was not long after that when suddenly universal brake fluid made it's appearance.

Are there any other tales of this nature which you remember?
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Last edited by Penman on Fri Nov 30, 2012 10:12 pm; edited 1 time in total
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ukdave2002



Joined: 23 Nov 2007
Posts: 4236
Location: South Cheshire

PostPosted: Fri Nov 30, 2012 9:03 pm    Post subject: Reply with quote

Hi Penman
There was a time in the pre (and probably early post) war era when in the early days of hydraulic brakes; brake manufacturers used their own rubber seal compounds and their fluid was designed for their own seals, using the “wrong” fluid could quite literally be disastrous.

Dave
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Penman



Joined: 23 Nov 2007
Posts: 4861
Location: Swindon, Wilts.

PostPosted: Fri Nov 30, 2012 10:14 pm    Post subject: Reply with quote

Hi
So they must have standardised by the time of the mixed systems then, but they still weren't after telling customers.
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Any 2 from:-
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Jim.Walker



Joined: 27 Dec 2008
Posts: 1229
Location: Chesterfield

PostPosted: Sat Dec 01, 2012 12:21 am    Post subject: Reply with quote

The fleet of DR450 Daimlers we operated had as standard, Dunlop front discs, Lockheed servo and Girling rear discs. This is from memory, it could have had Girling servo and Lockheed back brakes, but I do not think so.
It all added up to the worst hydraulic braking system I have ever met. And that on cars of over 2 tons that would do a genuine 120 mph.
Hoping, with crossed fingers, that the brakes, especially the hand brake would pass the MOT even after attention was always stressful.
We did once have one run away on a Derbyshire hill with the handbrake hard on and the parking pawl engaged. It snapped the pawl off and careered backwards into a stone wall writing itself off. THe hand brake lever was still hard on.
Jim.
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peter scott



Joined: 18 Dec 2007
Posts: 7215
Location: Edinburgh

PostPosted: Sat Dec 01, 2012 11:03 am    Post subject: Reply with quote

ukdave2002 wrote:
Hi Penman
There was a time in the pre (and probably early post) war era when in the early days of hydraulic brakes; brake manufacturers used their own rubber seal compounds and their fluid was designed for their own seals, using the “wrong” fluid could quite literally be disastrous.

Dave


The difference was vegetable oil or mineral oil mixed with natural rubber or synthetic rubber.

In recent times I think Citroen was the only manufacturer using mineral oil.

Peter
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