[Healeys] Brake Booster

[Bob Spidell]

Actually, there are two cylinders;  the main/master cylinder and one to actuate the air/vacuum valve (three if you count the vacuum canister as a cylinder).

I recommend spending a half-hour or so studying the manual so you know exactly how the servo (booster) works.  Instructions come with the rebuild kits.  Study the unit--maybe take notes and/or photos--as you take it apart.  What usually fails is the "gland" seal that seals the vacuum piston shaft.  Make sure the check valve works.  Unfortunately no one makes new ones and used ones are hard to find (check with BCS).  Probably a good time to replace the vacuum hose from the manifold to the servo.

You may or may not need the dry lubricant depending on the miles on the booster.  Probably a good idea to use it.  Sandstrom has a minimum order and hazmat issues ... expect to pay up to $50.

If you send the body out for re-sleeving, make sure the shop doesn't sandblast the air/vacuum valve area (or the threads to the brake lines).

It's arguably a "fun" job.


bs

--
***************************************************************
Bob Spidell         San Jose, CA        bspidell at comcast.net
'67 Austin-Healey 3000             '56 Austin-Healey 100M
***************************************************************