Re: ur-Q brake woes.....?

[steveb@newkla.kla.com (Steven Buchholz)]

>   The brake fluid level never went low enough to let air in.
>   The hydraulic boost system fluid level was very low,
>   took just over 1 quart to fill to the fill line. No difference
>   in failure mode was noted after topping up the
>   hydraulic fluid. One more note; hydraulic fluid
>   overflowed from the revisor when pumping the brakes
>   with the engine NOT running. Master cylinder is
>   original, >182,000 miles, hydraulic accumulator was
>   replaced about 5 years and about 50-75,000 miles
>   ago. All worked perfectly when placed into storage.
>   Power steering still works OK.
> 
>   Place yer bets! Is it the accumulator or the master
>   cylinder or something else? Any ideas on
>   troubleshooting this WITHOUT RPS?
>   (Random Parts Swapping)
> 
My money's on the accumulator.  You had to add fluid to the system and
there was no mention of a leak.  When you depressurized the system there
was an overflow condition.  I can't see the hydraulic pump or the brake
servo explaining your symptoms as well as the pressure accumulator.

Good luck ... and let me know what I won ;-)

Steve
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Steven L. Buchholz	KLA Instruments Corporation - RAPID Engineering
s_buchho@kla.com	M/S A1-3400, PO Box 49055, San Jose, CA 95161-9055
(408) 456-6244 (office/voice mail)	(408) 434-4284 (fax)

'88 5000CSQ Avant				QCUSA #317
'83 Quattro Turbo Coupe				QTC Registry #?????
'78 Audi Fox GTI 4+5 (ACHTZIG)
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