Re: Randy Berger's 1956 Caribbean

Posted by BH On 2007/10/28 10:58:23

Randy -

Good catch! That error appears in both the reprint as well as the original 1956 printing that I have.

The application listing for P/N 6492431 also references a 1" long relief valve piston, and when you look down the page, the related parts:

6492432 Piston - pressure relief valve
6492434 Spring - pressure relief valve piston
6492433 Plug - pressure relief valve psiton spring

...are all noted for 56th Series only (the late design pump).

Meanwhile, perhaps the one number higher P/N for the pump body represents the finished/machined part.

I see that there is no listing for a complete oil pump of the later design - that is, the one having the revised pump body with the plugged relief valve port and 1" piston.

As I have found some handwritten notes for newer P/Ns for other parts in the original parts book I have (though not this one), P/N 6480508 may very well be the number for a complete pump assembly of the later design, but I have never found any evidenece of it in any bulletin. Unless someone else has any hard evidence, I suspect the factory didn't want pumps being replaced carte blanche, but wanted the sump tube kit tried first (as a matter of warranty cost control) and withheld that P/N from publication.