Changing brake accumulator write-up

(JLo) #1

Should anyone need to change their accumulator or brake switch, I did a write-up.
https://foreverxjs.godaddysites.com/xj-s-blog/f/accumulator-atrophy

(BobPhx) #2

Thank James - very helpful !!

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(Kirbert - author of the Book, former owner of an '83 XJ-S H.E.) #3

Nice. Might I suggest adding that normal nitrile O-rings should not be used as they are incompatible with brake fluid?

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(Maynard) #4

What material o-rings should be used?

(Kirbert - author of the Book, former owner of an '83 XJ-S H.E.) #5

I dunno. If there’s any doubt, put a bit of brake fluid in a glass jar, drop in your O-ring, and leave it for a month. If the fluid turns dark, that’s bad. If the O-ring disappears, that’s really bad. Both things will happen with a standard nitrile O-ring. You need seals that are intended for use with brake fluid.

(BobPhx) #6

Here’s a pretty good write up…
https://www.pegasusautoracing.com/document.asp?DocID=TECH00147

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(JLo) #7

Thanks Kirby duly noted! I never considered the kind of O-ring but its true brake fluid can be very corrosive.