re: Spider front brakes spongy

[Dana Loomis <dloomis@domain.elided>]

Marty Wilson in Newcastle, Australia has a problem with the brakes of his
ex-USA Spider: 
>The braking system has been rebuilt with resleeved and rebuilt underfloor
>> master cylinder and rebuilt dual booster. However the brakes were spongy and
>> not up to the standards of fellow 105 dual booster systems...
>> What am I missing here? 

Have you tried bleeding the boosters?  Air bubbles can be trapped there,
because the booster is at the highest point in the system.  To bleed the
booster (servo), have an assistant step on the brake pedal while you crack
open the fitting on the output end just enough to let brake fluid trickle
out past the threads.  You may need to try this with the engine running so
the vacuum can assist with the process.  After completing this chore,
proceed to bleed the rest of the system normally.

Dana Loomis
NC USA

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