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Roger Garnett writes:
>So, can one of you Herald chassis experts
>lay out the history/usage of parts?
I suppose that means I'm elected, since, as Herald/Vitesse
Consultant for the Vintage Triumph Register, I have helped
millions of SC owners (well, thousands, OK, actually 200+)
with whatever advice I can provide. I don't have books in
front of me here at work, but if memory serves:
There are several different uprights and spindles, depending
on the vehicle. I am told that Formula Junior-type owners
actually prefer the early Herald upright, which has an extra
reinforcing rib cast into it; not all the later ones have
this. Spindles are different for: 1. Herald w/drum brake; 2.
Herald & Spitfire w/disk brake; 3. Vitesse/GT6. The last uses
a different set of wheel bearings; most Herald and Spitfire
(and some TRs) use the same bearings.
The early Heralds with optional disk brakes used (I think) a
bolt-on adaptor for the caliper; this may also have been used
on early Spitfire 4s. Most Spitfires, though, share the a
common upright and spindle up to end of production. Spitfire
4 and Mk.2 used one type of caliper. This was superseded on
the Mk.3 and subsequent models. All used the 9 in. disk, I
think.
I think all GT6s used the larger 9.75 in. disk with a
correspondingly larger caliper. Possibly an earlier style of
caliper, paralleling that on early Spitfires, was used on the
Vitesse and GT6 Mk. 1. I believe all GT6s, and most (possibly
excluding the earliest) Vitesses used an 8 in. rear drum
brake. (The 1973 GT6 Mk.III, with the swing-spring rear end,
used self-adjusting brakes.)
There are two common sizes of rear wheel cylinders: 5/8 in.
and 3/4 in. I am not sure what usually went where; it might
have had as much to do with what master cylinder was used as
with anything else. They are interchangeable, so long as it's
done in pairs, of course!
I hope this helps somewhat. I do have reference books at
home; if anyone would like more info, I'd be happy to try to
find part numbers (in the case of calipers, at least Girling
model numbers).
Andy -I'll never sell the original family Herald; I'll
probably never get a good chassis frame for it either- Mace
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