[ROVERNET - UK] more servo woes

Paul Smith Paul.Smith at auroraenergy.com.au
Mon Oct 23 02:01:54 BST 2006

P4s tend to be noisy with tappets, and yes it is best to set them warm (but you get burnt on the exhaust taking the sidecover off).
Note the roller followers on the 100; when did the rest of the world catch up?


-----Original Message-----
From: rovernet-bounces at lyris.ccdata.com
[mailto:rovernet-bounces at lyris.ccdata.com]On Behalf Of Kent Kinard
Sent: Monday, 23 October 2006 11:54 am
To: rovernet at lyris.ccdata.com
Subject: Re: [ROVERNET - UK] more servo woes

Steve and Peter,
I did get my Mk. II Girling booster on the P4 today. 
 Before I installed it, I took the back cover off and 
worked the piston numerous times until it finally returned 
without encouragement.  Installed the booster on the car 
and the brakes don't lock up, so maybe it is working.  I 
drove the car around the parking lot.  The engine seems 
too noisy.  I can't remember what Steve's 100 sounded 
like, but this one may need the valves adjusted.  It is 
quiet when cold and then ticks when warm.

Kent K.

On Sun, 22 Oct 2006 19:44:25 -0400
  S Manwell <s_manwell at alum.swarthmore.edu> wrote:
> Peter,
> Did you test the big vacuum piston to see that it moves 
>freely in the cylinder?  You should be able to push the 
>piston in against the big spring and the spring force 
>should be enough to return the piston when you release 
>the pressure on it.
> The assembly of the valves on the side of the aluminum 
>casting must be right too -- when you release the brake 
>pedal, the control piston in the smaller cylinder should 
>return, causing the valve to close off atmospheric 
>pressure and apply equal vacuum to both sides of the big 
>piston allowing the big spring to return it.
> I can't think what the O-rings would be for...

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