Frank,
I'm glad you wrote the List. I bought one of the "banded" units for a
replacement/spare for my original Girling, which has the screw-attached
cover for the vacuum chamber. I'll offer whatever info I can, but I
have a favor to ask in return ;)
As far as opening the canister, I had no luck trying to twist them apart
(doesn't mean it can't be done, though). I ended up cutting the band
with a cutoff tool, then welding two nuts on either end. On one nut I
drilled out the threads so a suitably sized bolt would go through and
engage the threads of the other, thus pulling the band tight. I think
this setup will work but, unfortunately I haven't re-assembled the unit
because the rubber elbow to the metal vacuum pipe broke and I haven't
devised a suitable fix (my other unit is working fine so there's no
imperative to do so).
<continued>
Frank Magnusson wrote:
> I am in the process of rebuilding the brake servo on my '65 BJ8 and have a few
> questions for the list.
>
> The body of the vacuum cylinder has Girling stamped in it, so I bought the
> Girling kit. However, looking at the pictures in the shop manual, it shows a
> unit where the back of the drum is just a flat plate held to the servo drum by
> about 6 screws. Wish I had this unit as it would come apart very easily.
>
> My unit must be a later one as it is one of those that the two pieces are held
> together by a serrated band. You twist the two halves to line up the
> serrations and the unit comes apart. I have rebuilt a similar unit on a
> Triumph Stag but on that unit there are mounting lugs on both halves; you put
> the unit in a vise and I made a tool to pick up the lugs on the other half;
> came apart pretty easily.
>
> Q1. On this unit, there is really nothing to grab on to to twist the two
> halves apart. The only way I see to do it is to put the whole thing in a
> large vise, push down with your full body weight to unload the spring between
> the two halves and then put a large band clamp around it and hopefully it will
> twist apart.
>
> Has anybody done this before and does anybody have any suggestions for getting
> it apart?
>
> Q2. I bought the rebuild kit from British Car Specialsts in Stockton, CA. I
> believe this is Norman and David Nocks outfit? Unfortunately they are closed
> today; hopefully you're on the list this w/e. :)
>
> The kit appears to be for the early Girling unit. Is there a kit for the
> later Girling unit, or are they the same kit? The vacuum cylinder looks to be
> the same as the early unit judging from the pictures in the manual; maybe the
> only difference is the rear half of the drum and the seals for it? Hopefully
> I didn't buy the wrong kit.
>
> Thanks in advance,
>
> Frank Magnusson
> Wichita, KS
> '65 BJ8
>
*******************************************************************
Bob Spidell San Jose, CA bspidell@comcast.net
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