I'm in the process of replacing the vacuum brake booster in my '81 242DL B21F. The shaft that sticks out of the front of the booster and goes into the back of the master cylinder is suppose to be adjustable in length. So far I've been unable to turn the little nut on the end of the shaft to set the length to specification.
The instructions say there should be 0.020" - 0.030" clearance between the end of the booster shaft and the back of the master cylinder piston. This is to allow the springs in the master cylinder to completely retract the master cylinder piston when your foot is off the brake peddle.
IPD has this video about it: https://www.youtube.com/watch?v=Tde6xd8ezr4
Any advice please.
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