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I am confused as to if there is a date code on the p/b master cylinder for 1965. The NCRS judging guide seems to say yes whereas I've read on the forum that date coding on these didn't start until 1968. Am I reading something wrong? Also if there is a date where is it located. And lastly what is "Julian" dating and what would it look like for a Sept.1964 production date. As always , indebted to all you knowledgeable people for your help, I would be lost without you!
I am confused as to if there is a date code on the p/b master cylinder for 1965. The NCRS judging guide seems to say yes whereas I've read on the forum that date coding on these didn't start until 1968. Am I reading something wrong? Also if there is a date where is it located. And lastly what is "Julian" dating and what would it look like for a Sept.1964 production date. As always , indebted to all you knowledgeable people for your help, I would be lost without you!
I believe all PB master cylinder ''BOOSTER'' is julian date coded.
Arrow at the year (Edit: or maybe not, see kenba's note below), circle over the julian date (231 would be the 231st day of 64, if that's an 8, then 281st day)
[QUOTE=rfn026;1592293198]If you want to have your original M/C rebuilt I had a really good experience with White Post Restoration.
btw - They do NOT recommend the use of silicone brake fluid.
The owner ("Billy", who died about three years ago), was paranoid about DOT5 silicone fluid, probably due to how some 50-year-old rubber seals reacted to it. He's gone now, but the myth continues..
I just installed Lone Star o-ring conversion kits in the '66. They told me to stay away from Dot 5 because there have been some failures recently. They are asking every customer with 0-ring failures to disclose exactly which Dot 5 they were using and the investigation continues.
Apple hydraulics in NY who sleeved my master cylinder told me not to use Dot 5 unless I use the expensive version and to stay away from ''cheap store brand'' Dot 5.
The owner of Lone Star swears nothing beats a good heavy duty Dot 3 because it's been consistently good for over 30 years. Either way, it's always best to flush out Dot 3 every few years and replace it.
"4" is the pattern number that was used to create the sand mold for that particular casting (the mold is destroyed after the casting has cooled and has gone through the "shake-out" table to remove the sand). Foundry patterns were either stainless steel or cast iron, were used to create thousands of molds, and numbering them (when there was more than one being used at the same time) allowed for internal traceability; if there was a quality problem with a casting, the pattern number would take a process engineer right to the source of the problem.
05-25-2016, 08:36 AM
1965 P/B master cylinder
