Re: IML: brake master cyl pushrod

["mike and linda sutton" <mikanlin62@xxxxxxxxxxx>]

Ok, this is mostly from memory....

On most of these that I have removed and replaced, the rod from the brake 
pedal to the booster didnt have any adjustment on it.  The pushrod from the 
booster did have an adjustment and in every piece of factory literature I 
have researched, it does not give an adjustment length or method.  In fact, 
the one text I have seen for my 62 says to NOT adjust the length of the 
pushrod between the booster and the master cylinder.  It does reference the 
rebuilders text, which was apparently something that was done at a level 
above the dealership, such as the in-house division Chrysler had to perform 
these type of tasks.

In a real world scenario, you need some amount of free play / clearance 
between the master cylinder piston and the booster to ensure the master 
returns fully when you release the brakes.  This clearance will also 
determine to a degree, the " feel " of the brakes as you apply them because 
the booster is not just an on or off type relationship.  If it were, it 
would be much more sensitive to pedal application and the result would be 
brakes that would be very touchy.

If ANYONE has found a reference to the booster to master cyl clearance at 
the booster pushrod, I would be extremely interested in hearing it. I have 
measured the distance on three boosters from 62 and 63 cars and found them 
to be the same, fwiw.

Thanks much

Mike Sutton
62 Crown Coupe 


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