[ROVERNET - UK] P5 Girling booster

Kent Kinard kkinard at wcc.net
Thu Oct 19 20:12:03 BST 2006

Let us return to Roverdom lest Eric send us all into exile.

Ruth suggested that I use a P5 type booster on  my P4/100 rather than 
try to rebuild the older style booster.  When I got down to putting it 
all back together, I noticed a crack in the retainer ring (large 
diameter bit that holds the leather seal and rubber tensioner on the 
servo piston).  I pried on it a little and it broke!  Fortunately, I had 
a spare piston (but only one).  Has anyone seen this type of failure?

With the new rubber behind the leather seal and the leather greased 
liberally, the piston does not slide very well in the vacuum chamber.  
After depressing the piston by hand (required to center the bushing) a  
sharp rap is required to get the piston to return in spite of 
considerable spring pressure.  Is this normal after rebuilding this type 
of booster?

Kent K.

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