Imperial Parking Brake Vacuum Release Adj. (1965-66)
With engine running, parking brake should release when transmission shift lever is moved to "D" or "R" on transmission selector. Parking brake should stay on when "P" or "N" is selected. If adjustment is necessary, place gearshift lever in "N", loosen parking brake release valve mounting bracket retaining screws enough to permit movement of bracket in oversize mounting holes. Position bracket and valve assembly so that valve plunger is on high point of neutral cam and approximately one-half depressed (check visually). Tighten bracket retaining screws.
Check adjustment by shifting transmission through all positions. Valve plunger must be depressed on high points of cam, while in "N" or "P", and must not touch cam in "D" or "R". If parking brake must be released with engine not running, use manual release lever on left side of parking brake assembly.