[ROVERNET - UK] P5 Girling booster

[Kent Kinard]

On Fri, 20 Oct 2006 14:04:26 +1100
  "Paul Smith" <Paul.Smith at auroraenergy.com.au> wrote:
> My recollection from P4 workshop manual is that all the 
>90s, 105s, 60s (if any 60s were made that late) had 
>Clayton.  80s, 100s, 95s, 110s had Girling.
> So 1959-60 was when the change was made.


I had never really looked at the servo that is on the car 
at present to make comparisons with the workshop manual. 
 In retrospect, I think Ruth was trying to get me to use a 
Lockheed and I misunderstood.
  
It turns out the servo on the car is neither fish nor 
fowl.  It appears not to be a Rover servo at all, but 
rather a Girling servo from a Triumph GT6 or similar.
It bolts up to the Mk. II mounting bracket and uses the 
same main body, but a smaller vacuum chamber and piston, 
which would partially explain why the previous owner 
thought the brakes were so poor.  The car will now get a 
proper Mk. II if I can get the piston to slide.  Yes, 
Steve, the new rubber rod is thicker, but the old one was 
completely unusable.  I may try it to see if it will 
loosen up since I don't have or know of a good substitute 
for the rubber rod.  The Mk. II Girling servo was 
introduced on the P4 with the beginning of the 1960 model 
year production but appears to have been fitted to P5's 
with drum brakes from the onset of P5 production in the 
fall of '58.

Roverly,
Kent K.