[Healeys] Brake servo

[Michael Salter]

Actually I think this may be a servo problem. If the piston the servo does
not return all the way the symptoms are similar to those when the master
cylinder push rod is not adjusted correctly. 
The check, the best trick I know of, is to create the locked on brake
situation then with the engine turned off tap the brake pedal gently a few
times which will usually result in the servo piston returning to its home
position and the brakes releasing. 
Usually when a brake hose collapses the brake pedal feels normal and one
front or both rear brakes are locked on.

Michael Salter
http://www.netbug.net/blogmichael/?p=445

-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of Alan Seigrist
Sent: Monday, July 20, 2009 6:20 PM
To: Gaagten; Healey forum
Subject: Re: [Healeys] Brake servo

Ge -

A broken servo will not cause these types os symptoms so your servo is
probably ok.

Repace you flexible rubber brake hoses, it sounds like that is your
problem.  One of them has delaminated inside.

Alan

On 7/21/09, Gaagten <gaagten at hetnet.nl> wrote:
> Hello,
> Yesterday I intended to go for a ride. Taking the car out of the garage I
> noticed a strange behavour of my brakes.
> The pedal felt very hard and not too much breaking was there. I just drove
> some blocks and nothing was chanced. Pushing the brake pedal several times
> resulted in blocking of the front brakes and the car could not be moved
> anymore).
> However after a little time the brakes released themselves again.
> My conclusion is that something is wrong with the brake servo. The servo
is
> on
> the car as long as I have it (almost 15 years, about 20.000 km)
> So, if I have to replace the unit, which servo type should I take. I have
> probably a girling now. I know that the substitute for this is a Lockeed
> servo.
>
> Any other idea
>
> Thanks and regards,
> Ge Aagten
> BJ8
> The Netherlands
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-- 
Alan

'52 A90
'53 BN1
'64 BJ8
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