Quick question, let's say you lose the rear brake line on a D90, is it dual circuit? - Defender Source
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  #1  
Old July 20th, 2009, 03:02 PM
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Quick question, let's say you lose the rear brake line on a D90, is it dual circuit?

Are the front and back brakes on seperate circuits so that it will still stop or no? I want to say that on a disco I it is LF/RR and RF/LR on seperate circuits.

TYIA for a prompt answer.

Ron
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Old July 20th, 2009, 03:10 PM
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On d90 you have three lines off master cylinder. One right front, one left front and one to rear which T's at axle. D90 or 110 has proportioning valve - can't remember which, but I think it's 110?
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Old July 20th, 2009, 03:22 PM
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Sorry, it is a 110 not a D90. It has a proportioning valve. If I lose brakes aft of the proportioning valve, it should still have front brakes right.

Ron
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Old July 20th, 2009, 03:29 PM
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Skinny Pete
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it is a two circuit system so yes you wlll have some brakes. but there is no shuttle valve to stop the fluid to the compromised circuit.
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Old July 20th, 2009, 03:37 PM
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So, if I top it up it should be ok until it leaks out again? I just need to move the thing half a mile.

Ron
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Old July 20th, 2009, 03:42 PM
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Skinny Pete
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sure. you will know if it is really bad. the reservoir is divided so it shouldn't all leak out anyway. the pedal will be low.

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Originally Posted by evilfij
So, if I top it up it should be ok until it leaks out again? I just need to move the thing half a mile.

Ron
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Old July 20th, 2009, 03:49 PM
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TY,

I am betting some series style pumping will be sufficient to make it stop.

Ron
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Old July 20th, 2009, 04:08 PM
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Does not run. No hand brake. I drove my series truck without brakes for a while, but I had the motor running to slow it down.

I am thinking about leaving it in 2nd or so and just letting out the clutch when I want it to stop.

Ron
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Old July 21st, 2009, 08:05 AM
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Scott Y
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Ron,

I have been suffering through a brake system replacement on a 1970 italian car over the summer. In case you need to replace the chassis mounted hard lines and connectors, you might want to check out www.fedhillusa.com. They have the largest selection of fittings, bleed valves, that I have ever seen.

Scott
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