I never heard of a separate master cylinder for the fronts and rears. Perhaps the other master is for the clutch. Maybe the hydraulic clutch on a P series truck was a hang over from 60-62 models. Drum brakes were the standard for their day and performed relatively well.
They are nothing compared to the newer systems, however.
The first thing I would recommend to anyone is to remove the wheels and inspect the brakes before driving the vehicle. Lots of things contribute to poor brakes, leaking or stuck cylinders, worn linings, oversize or scored drums, axle seal leaks, collapsed hoses, springs, improper adjustment, etc.
Fred
Last edited by rfs56trk; 06/09/2018 3:46 PM.
