Disc Brake Hold Off Valve
'67 Proportion valve in and out shown here
http://www.imperialclub.org/Repair/Lit/Master/233/page12.htm
'69 should be the same.
A metering (also called
hold off
) valve was used on the floating caliper intermediate cars, and some others, depending on the year. Not on kelsey Hayes set ups.
See here:
http://www.imperialclub.org/Repair/Lit/Master/274/page12.htm
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