I am not familiar with either 1960 or 1966 trucks, but let me make a couple of comments that may or may not help. Some people advise bench bleeding a new master cylinder before installation. You can search in this forum for previous threads on that topic. Otherwise, in bleeding a system with a hydrovac, you must start with the hydrovac itself. I am familiar with only the first and second series of these devices and they have two bleeding ports. One of these is near the body of the valve and is done first, the second is near the outlet and is done second. Then you go to the wheel cylinders, start with the one that is on the longest line (usually a rear) and go progressively on shorter lines to finish with the cylinder on the shortest line.
To dwightviking1960; I do not understand what you mean by having to drill and tap the new master cylinder. The hydrovac is in series with the brake system, meaning the line from the master cylinder goes into hydrovac, and then the line from the hydrovac goes to your brake lines. There should be no drilling or tapping, unless I am demonstrating my ignorance of later types.
To 66dump; without punctuation in your post I find it difficult to follow your thoughts or understand your question(s). "adjust the night"?? I hope, however, that my above comments are constructive.
Kent
Last edited by Lightholder's Dad; 04/29/2014 4:30 PM. Reason: typos
