I performed the same job a couple of years back, in a fully- equipped shop,
with the assistance of six technicians available for the asking ... one
piston was such a bugger to get out that we ended up putting full shop air
pressure to it and firing it up into the ceiling! ISTR that my kit didn't
include the caliper-halfs seals (And that every book I could find said
"DON'T SPLIT THE CALIPERS" ... so I did, and they're still fine!
Luke
'71 Spit "Fireball"
'73 MGB "Furniture"
----- Original Message -----
From: "Scott A. Roberts" <herald1200@home.com>
To: "Triumph List" <triumphs@autox.team.net>; <spitfires@autox.team.net>
Sent: Monday, June 11, 2001 10:54 PM
Subject: Type 12 Calipers
> If anyone ever asks if you know anyone stupid enough to rebuild their own
type
> 12 calipers, show them my picture.
>
> Armed with my fresh from Fitchett's rebuild kits, I lightly honed, then
> rebuilt my calipers. I had forcibly removed the pistons some time
back,(HINT:
> Find a VW Beetle caliper puller- it should work! I had my hands on a bunch
at
> Carlisle, and thinking I wouldn't need one, didn't spend the $5.00. You
will
> need it for reassembly...) I proceeded to clean the calipers, give them a
coat
> of paint(for the record, I used silver Rustoleum hammer finish,
oversprayed
> with Rustoleum black, for an interesting though unoriginal mottled gray)
and
> started to reassemble them. My first discovery was that the rebuild kits
did
> not have new O-rings for between the two halves. So I got some at work.
They
> should be ok with the Silicone fluid. If not, I will have some problems
till I
> find new originals...
>
> Anyway, I also replaced the bleeder screws, and started on the pistons.
> Pistons were a little tight going through the rubber O-ring, but
eventually
> seated properly(I tested one by direct attaching the master cylinder.
Hint-
> Remember- when testing a dual opposing piston caliper, you must either
have it
> all together, or block off the crossover drilling. After the fluid shot
over
> my left shoulder, I covered the hole, and tried again. It operated fine.)
>
> The to installing the piston dust boots. Oh what fun. The caliper side is
a
> pain in the A.., and the piston side pretty easy. But I got them on. Then
I
> reassembled the two halves, and just have to find my torque spec.
>
> Good Luck to those who wish to follow in my footsteps with regard to
> rebuilding these calipers. Save the trouble- spend the money for rebuilts!
>
> Scott
> still throwing things...
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