Re: S-Type SU overhaul and brake booster

[ANITA.SHERWOOD@xtra.co.nz]

ANITA.SHERWOOD@xtra.co.nz wrote:
> 
> ANITA.SHERWOOD@xtra.co.nz wrote:
> >
> > Mike Hutchings wrote:
> > >
> > >      Well I completed the install of the PBR Type 40 brake booster.  No
> > >      hiccups here other than relying on a one person brake bleeding gizmo.
> > >      With one end of the tube tightly connected to the nipple and the other
> > >      end, with a spring loaded ball stop arrangement set at it's lightest
> > >      resistance in a jar, I depressed the brake pedal.  I heard a pop, my
> > >      foot went straight to the floor, and I heard the sound of a jet of
> > >      brake fluid being sprayed everywhere but into the jar.  A mad rush to
> > >      clean up.  Another gizmo bites the dust.  I found a cheaper, and
> > >      cleaner, option by giving one of my kids a chance to earn some extra
> > >      pocket money by sitting in the Jag!  I've only had a small drive since
> > >      but what a difference.  No more need to plan to stop three blocks
> > >      ahead.
> > >
> > >      I also connected up the vacuum hose from the intake manifold and
> > >      reconnected the hose to get the scuttle servo operating.  This still
> > >      doesn't work so I'll have to start looking down the line to see what's
> > >      up.  At least the non return valve is working on the vac reservoir.
> > >
> > >      The other job, overhauling the SU's, went better than expected.
> > >
> > >      Again everything went reasonably according to plan.  That is, instead
> > >      of one hour to finish the job it took five.  As I mentioned before,
> > >      the linkages where the problem, combined of course with the tight fit
> > >      under that hood (bonnet?).  I had completed disassembled the linkages
> > >      and cleaned/ replaced what I could.  I found that a cup of coffee and
> > >      some time spent working on the assembly order was well spent.
> > >
> > >      I must admit during the reassemble I was thinking of what I could do
> > >      when it didn't fire up.  No need.  Three hits of the "go" button and
> > >      off she went.  Not bad settings either.  After using some spare vac
> > >      hose to the ear to check the air ( I passed on the chance to buy an
> > >      air flow indicator for $80 ) some minor adjustment to the mixture it
> > >      was purring for the first time since I've had the car.  I was able to
> > >      bring the idle down to 600rpm ( it's an auto ) and all the roughness
> > >      I'd been putting up with was a thing of the past.
> > >
> > >      Ok now the crunch.  The AED is leaking.  I'm fairly certain that it is
> > >      the fiber washer where the AED is attached to the housing coming from
> > >      the front carby.  I've used about as much force as I'd like to in
> > >      tightening it.  I know I'll have to pull it off but any clues on a
> > >      replacement for the fiber washer? Another one, neoprene etc?  There
> > >      has always been some loss through this area but now its actually
> > >      forming drips.  The washer is new as were all the washers (including
> > >      the aluminum ones).  Which reminds me I had to buy two new diaphragms
> > >      as well - at AUD$24.50 each.  With the gasket kit, piston and
> > >      diaphragm springs, needles the parts for overhaul has cost AUD$165.60.
> > >
> > >      Oh another thing.  In the archives I have seen a few good reports
> > >      about using MSD Coils.  Is there any value in this (ie the MSD) coil
> > >      if you don't intend putting in the whole multi spark ignition system.
> > >      I like the idea of getting the Jag to start in half a revolution
> > >      instead of the two to three it currently takes.  I've replaced the
> > >      plugs, leads and distributor in the last three months.
> > >
> > >      mikeH
> > >      3.8 S-Type Auto
> > Dear Mike
> >     Had a simmilar problem with my 420, No vacuum servo working.Traced
> > the problem to the little valve in the master cylinder end, which
> > actuates the vacuum valve on the end of the master cylinder, had
> > seized.I removed the vacuum unit & the steel plate attached to the
> > master cylinder, got the missus to slowly depress the brake pedal while
> > I watched for the valve to pop out. Unfortunately a bit of pressure on
> > her behalf was needed to move it. Well out it shot, onto the lawn, plus
> > brake fluid every all over the guards etc, run get water wash down car,
> > spend 2 days hunting for it almost continuously we gave up. Thinking
> > that a Hillman hunter booster looked the same I obtained one from the
> > wreckers and removed the same valve, it was almost identical except to
> > long, so I shortened it down to aprox what I thought was the right
> > length, reassembled it, bled
> > the brakes & hey presto, vacuum brakes. No more two feet on the brake
> > pedal to stop ! Choice.
> > Could be same problem with yours ?
> > regards Murray

---

References:

• S-Type SU overhaul and brake booster
• From: mikeh@dist.gov.au (Mike Hutchings)
• Re: S-Type SU overhaul and brake booster
• From: ANITA.SHERWOOD@xtra.co.nz

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