A faulty equalizer valve can cause low pedal.
Check the rear brake shoes installation. Shoes have to be installed in the correct direction. Reversed installing of leading and trailing shoes can result in low pedal as well.
A vehicle this age could have the master cylinder replaced more than once and if a mistake made previously with an undersized master cylinder you would be never be able to solve the problem with a replacement sized as per the one on vehicle.
Sunday, October 28th, 2012 AT 6:37 AM