Brake Seize Vacuum Hose

[why]

Well, I hate to challenge the gods, but thanks to web searching found comment about crimped vacuum hoses causing a brake seize that seems to go away after a few minutes (pressure leaking passively back through constriction as opposed to forced through when pedal applied). So examined hoses and found one from the disk at the front of the brake master cylinder, goes from the back part of disk to a three way plastic connector just below and forward of site of origin. The hose makes a 180deg turn to get out of cramped spot and seemed pretty collapsed at apex of turn. Bought new hoses, big box parts store, Pep Boys, said hose was gas line but since they were out of vaccum hose, bought enough footage to replace all hoses. Replaced just the crimped one and based on two runs, all is well, in fact, on and off response is great, can make the front end bob up and down like flipping a switch by just tapping brake. So expect problem solved. fingers crossed. Not sure what mechanism is for one or the other caliper to cause all four wheels to lock-up but will keep that in mind. Also never bought into the fluid deal, never change except for occasional (decades or so) rebuild of one or another caliper and bleed probably replaces most of fluid. Most people seem to treat brake fluid as a just check level with no problems and examine each wheel for sign of wetness if level changes. Try to drive car 2Xweek, Jay Glass, '67 roadster

 

[mikephillips]

Keep an eye on it as I wouldn't think fuel line is as resistant to collapse as vaccum line would be. You might try a place that makes up hydraulic lines and fittings, they probably have something more suited.