Bevluvsrats wrote:Look, I'm not here for criticism, Dad knows what he's doing, he's a retired mechanic / engineer for goodness sake. And if he knew the brakes were that dangerous he wouldn't have taken it out. They failed after 8 or 9 miles, so as far as he was concerned all was well, and he just needed to bed in the linings. Please can we not lose sight of the fact that I'm here to ask for help?
Bev I'm sure your dad wouldn't deliberatley take a dangerous vehicle on the road, that said, brake problems are not something you test on the highway. Unless you have a "full pedal" before driving (which by your own admssion wasn't the case) you seriously need to consider driving the vehicle, let alone on the road, so I do understand, and agree with the comments of others on the forum regarding the safety of others.
OK lets be constructive, the photos show that seal assembly is according to the Lockheed schematic, (but do not show bore condition) which leads me to two conclusions, either the cylinder bore has "Glazed" not allowing the seals to work as designed, or "PIN N, piston stop pin" on the schematic is not being installed the correct side of the piston. if this is the case make sure the piston is pushed to the bottom of the cylinder before the pin is inserted, then continue with the second piston assembly. If the cylinder needs de-glazing you can use a "glaze-breaker" before re-assembly.
Before re-fitting the master cylinder to the servo it is very easy to test it's innitial operation, block the outlets of the cylinder with your fingers, operate the cylinder with a screwdirver, if your fingers are not immediately pressurised, and then pushed away, there will be insufficient brake fluid pressure at the wheel cylinders!!!
Please note this is only an indicative test, a "Full Pedal" after bleeding (no pedal travel with engine off) is the correct way to determine whether a vehicle is roadworthy.