Hi John,
What you are experiencing sounds to me like air in the system.
The PBR servo units are meant to be installed with a bleed screw on the
highest portion of the cylinder, which is why they have 2 outlets.
You don't mention bleeding the servo unit and I wonder if you have
missed this.
Michael Salter
www.precisionsportscar.com
-----Original Message-----
From: owner-healeys@autox.team.net [mailto:owner-healeys@autox.team.net]
On Behalf Of john lakie
Sent: Wednesday, July 21, 2004 5:44 PM
To: healeys@autox.team.net
Subject: servo problem?
After several years of driving my 65 BJ8 without a
brake servo, I finally got around to rebuilding
(replacing all seals in) my PBR unit. The main
cylinder looked excellent without any noticeable
scratches or scoring, hence I did not have it
resleeved.
After reinstalling the unit, I bled it, then proceeded
to bleed all four wheels. When I step on the brake
pedal it goes right to the floor with no resistance
whatsoever. However, if I pump it rapidly with about
a half a dozen strokes, it builds up pressure to what
I would consider about the right amount of "pedal".
It has a somewhat cushioned feel, as I would expect
with a servo. (previously a very firm pedal without
the servo). If I hold it there, it doesn't seem to
fade as long as I don't completely release the pedal.
But as soon as I let it return completely to it's
fully released position, I lose ALL pressure, and it
now goes right to the floor again! The master cylinder
was working fine before introducing the servo????
Any suggstons would be greatly appreciated.
Thanks, in advance,
John Lakie
65 BJ8
Ontario, Canada
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