I recently acquired a '50 4100 cab and chassis that has very low original miles on it. However it has been sitting up for the better part of 40 years. Needless to say the brake system was fossilized on it. It is equipped with a hydrovac unit that is also currently in a fossilized state. I am in the process of restoring the brakes and to my delight I have discovered so far that I haven't really had to buy many parts. New rubber lines and a few new cups, etc, but everything else is in good, restorable condition. My question is this - were ALL of these size trucks equipped with the hydrovac setup or was that an option? I don't have any plans to haul any 30,000lb log trailers behind this truck. More than likely I'll be running it up and down the road here locally, empty. Maybe to a car show or two or a parade, etc. Can I get by with just deleting the hydrovac unit and plumbing directly to the main master cylinder? The truck has a 1.25" master cylinder with 1.25" wheel cylinders on all four corners. The rear brakes are 15" x 3" and the fronts are 14" x 2".
Last edited by mechanic58; 04/20/2016 4:23 PM.
