XJ40 ( XJ81 ) 1986 - 1994

Where is the brake booster vacuum hose located in an XJ40?

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Old 03-11-2012, 03:49 PM
Steve W's Avatar
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Default Where is the brake booster vacuum hose located in an XJ40?

Even the guy at Kragen O'Reily's couldn't find it. I wanted to try the Sea Foam to clean it out.
 
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Old 03-11-2012, 05:11 PM
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What year is your XJ40 ? AFAIK early cars didn't use a conventional vacuum booster, but something else called a brake pressure accumulator. However, I don't know how or what it "accumulated". Later cars were conventionally boosted, of course. Normally a vacuum pipe runs from somewhere on the inlet manifold to the brake servo.
 
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Old 03-11-2012, 05:12 PM
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Originally Posted by Fraser Mitchell
What year is your XJ40 ? AFAIK early cars didn't use a conventional vacuum booster, but something else called a brake pressure accumulator. However, I don't know how or what it "accumulated". Later cars were conventionally boosted, of course. Normally a vacuum pipe runs from somewhere on the inlet manifold to the brake servo.
It's a 1991. I did have to replace a brake accumulator so that may explain whythe guy from Kragon couldn't find the hose.
 

Last edited by Steve W; 03-11-2012 at 05:18 PM.
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Old 03-11-2012, 05:23 PM
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Hopefully somebody expert will tell us the intimate details of the 1991 XJ40 braking system !!
 
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