laifman(at)flash.net writes:
>He only did one of the five steps of the bores. He did not seem
>familiar
>with the design of the Girling, so did not know how they are stepped.
>He
>has done stepped bores, for master cylinders, but the Girling actually
>has two chambers. In the Girling the piston rod goes through that pesky
>canister seal, then decrease in diameter for the moving piston rod
>output
>bore. Rather long. The second bore is on top of this one and appears
>to
>have four steps, three of which have static or moving seals. The last
>one appears to be for control valve end shaft penetration clearance. I
>would guess that 5 is the correct number of wearing surfaces that
>sequentially step down.
He actually did all five of my bores. And, you're right, he wasn't
familiar with them. I simply sent him the aluminum housing with
internals, new seals and a page from the service manual so that he'd
sould be certain to get good tolerances for sealing. He told me $150
up front, so maybe that's why I got what I consider a good deal.
Yes, you must dismantle and reassemble your own unit. I am a budget
restorer, so I had long ago decided that when I could do something
myself, I would. I used the Lucas parts sold by SS. Don't know if
they're any more or less reliable than Girling parts. Believe me, if I
could have afforded it, I would have had someone else do it. There's
much to be said for guarantees and warranties, things I do not get by
doing it myself.
Christopher
Christopher
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