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Re: 5480848 casting number ID
Geoffrey----
First of all, are you sure that the cylinder is actually 1" and not 1-1/8"? Secondly, are you sure the number is not 5460346? The difference between "8", "6", "3", and "9" is very difficult to distinguish on these master cylinder castings. You have to use a magnifying glass and study it very closely.
Anyway, I've never been able to confirm that GM or Delco used ANY part numbers in the "548" series; "547" series are the highest that I've ben able to find. After that, Delco-Moraine generally went to the "1800" series of 8 digit part numbers.
Also, I can't find any reference to a "CN" code master cylinder. Obviously, it existed because you have one. I don't think that it was Corvette, though.In Appreciation of John Hinckley -
Re: 5480848 casting number ID
Joe,
You could be right, and probably are right. It could be 5460346. Those numbers they set in the casting mold are certainly worn or not well cleaned after the cast iron is freed. I'm sure it's a Delco part, just not sure what it may be a an authentic replacement for.
Plus, I'm reading through a 6 mil poly bag that is sealed shut, with a small chunk that chemically treated Brown paper inside, that you sometimes find in with GM parts.
Still looks like 1" when remeasured with a wood ruler. I would use my vernier
but I don't want to puncture the poly bag. I don't have a heat sealer at home.
Geoffrey CoenenComment
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Re: 5480848 casting number ID
There are some very poor quality castings where the numbers look like 8's. Somewhere here I have a few photos of the casting #'s. Very easy mistake. We take both numbers on the judging field.Dick WhittingtonComment
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Re: 5480848 casting number ID
Geoffrey-----
Is there a GM part number for the unit anywhere on the packaging? That will "tell the tale" if you can find one.
I've never known of a 1" bore master cylinder manufactured from the 5460346 casting. However, I suppose that it's possible that some were. I don't see why a 1" bore master cylinder could not be manufactured from this casting. During the 67-72 period I don't think that any were. Thereafter, though, it could have happened, especially for SERVICE.In Appreciation of John HinckleyComment
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I don't have the box anymore, MIA
Joe
If I'm reading my wood ruler wrong and it's 1.125" ID, then what may it be? It's definately a service piece. Function trumps form when stopping 4000 pounds of stuff.
Geoffrey CoenenComment
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Re: I don't have the box anymore, MIA
Geoffrey------
Do you realize that it's not returnable if you've lost the box?
The only 2 possible bore sizes that I can see for it would be 1" or 1.125".
Function ALWAYS trumps.In Appreciation of John HinckleyComment
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Re: I don't have the box anymore, MIA
Joe,
I don't need the box. This was discontined so long ago, that I think this returns eligibility ended during Regans administration. Plus, I don't think "Delso" is in an position to take anything back. I know it will probably work and it was made in the USA. I think I'll save this door stop. Plus I can toss it any gate crashers.
Geoffrey
PS Are you attending the January Old Town Soiree? I've already got my dress.Comment
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Re: I don't have the box anymore, MIA
Geoffrey-----
If it's a 1" or a 1-1/8" bore cylinder, it will work for a Corvette even if it's not for a Corvette application. All that MAY have to be done is remove any check valves that may exist in the outlet port and, possibly, change the primary piston (check for pushrod depth differences).
No, I'm afraid I won't be at the Florida meet. Maybe next year. I need to get my 69 done, although I won't be driving it there even if it's done.In Appreciation of John HinckleyComment
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