The sticking brake booster...one of my most negative memories after working on
Austin Healeys for 40+ years! There are a bunch of items that can cause the
problem but most often it is the failure of the vacuum piston and seal to
return home. A poorly prepared can, improper lubricant, too thick a packing
under the leather seal are the usual issues in the vac can. Of course there are
other issues like bad air valves, springs or seats, faulty cylinder bores or an
assembly issue that may not cause locked brakes but do cause a lot of grief.
Maybe I'm just getting old but I swore off rebuilding Girling brake servos 15
years ago. I send them all to Power Brake Exchange in CA and haven't had a
problem since.
Aloha
Perry
In a message dated 09/14/08 10:02:31 Hawaiian Standard Time, RAWDAWGS writes:
I have a buddy who just rebuilt his Dad's Healey's brakes. He did everything
brand new and is using silicon brake fluid. Anyway he drove it around the
block a couple of times and it was fine, but when his Dad drove it the brakes
would lock up and stay locked. He think he has traced the problem to the
rebuilt power assist booster. I have a BN4 w/o a booster so I'm no help. Any
ideas?
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