oscar03 Posted November 23, 2011 Share Posted November 23, 2011 go round in turn and clamp each of the flexi's. if you clamp the rear flexi and the brakes are good, the problem is the rear part of the system. if you clamp the flexi to the N/S wheel and the brakes are good, your problem is the N/S cylinder etc etc. also this will let you check the master cylinder - you could clamp all the flexi pipes and see if the pedal is good. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted November 24, 2011 Share Posted November 24, 2011 I'm thinking a dead, newly supplied, master cylinder, or the actuation rod is maladjusted. Quote Link to comment Share on other sites More sharing options...
ejparrott Posted November 24, 2011 Share Posted November 24, 2011 you're making me wonder about mine now......I'd just put it down to a leaking pressure bleeder, which I've now replaced but not had time to have another go at the brakes... Quote Link to comment Share on other sites More sharing options...
discomikey Posted November 24, 2011 Author Share Posted November 24, 2011 right, replaced front cylinders again as there is a tiny amount of fluid behind the dust caps in one end of one cylinder. thought id replace em both anyway, checked the back again there fine. bled up and now i get sort of a little pedal after about 10 enthusiastic pumps. at this point the pedal is about an inch off the floor and holds pressure as long as you need it to once you get it. theres NO leaks in any of the lines, nor in the splitting front/back t piece valve thing. so as it holds pressure does that mean the master is fine or can a faulty master still hold pressure when it is fubar'd? also i think ive adjusted the push rod right, i adjusted it so there is no play in the pedal before it starts to move the piston in the cylinder. Quote Link to comment Share on other sites More sharing options...
ejparrott Posted November 25, 2011 Share Posted November 25, 2011 have you stainless or OE flexis? If OE, they're not expanding are they? Quote Link to comment Share on other sites More sharing options...
discomikey Posted November 25, 2011 Author Share Posted November 25, 2011 theyre OE and they werent bulging or expanded when i checked the system under pressure. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted November 25, 2011 Share Posted November 25, 2011 Have you tried clamping them all and seeing what the pedal is like? I am still mooting the master cylinder... Quote Link to comment Share on other sites More sharing options...
oscar03 Posted November 25, 2011 Share Posted November 25, 2011 Have you tried clamping them all and seeing what the pedal is like? I am still mooting the master cylinder... i suggested that a few days ago!! Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted November 25, 2011 Share Posted November 25, 2011 Yep, sometimes Mikey needs a prod more than once in the right direction.... On another note, I just found my M/C is dead, except this locks the brakes ON with a solid pedal ... Quote Link to comment Share on other sites More sharing options...
Snagger Posted November 26, 2011 Share Posted November 26, 2011 Clamping all three hoses and checking for pressure is a good start to isolating the fault. One very common error that can cause these problems which hasn't been mentioned is fitting the brake shoes on the wrong way around, such that the front shoe of each wheel is in the rear position and vice-versa. They will fit the mount, slave and drum perfectly, but the adjuster cam will miss the peg on the shoe so the shoes will always fully retract. Across eight shoes and pistons, that's a hell of a lot of fluid to pump before the shoes all make firm contact with the drums and start building pressure. Taking the drums off to check the shoes each move out as you turn the adjusters will confirm or eliminate this as the cause. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.