Originally Posted by ABento
What you may have John is the early Sealco plate that says push to park, and the valve has been changed to a newer style that is pull to park,a picture of nameplate and valve would be helpful.
Exactly what I was thinking.
I have an old Sealco parking brake valve from a White 3000 and it works as it's tag describes, but it is opposite of modern parking brake valves.

John just has a replacement valve and an old tag.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-