brakes worked fine before (fine as in you slam them, you will be sent forward) then master cylinder went out of it. put a new one on it, bench bled it, bled the lines, all done right, got it down the road, you have to major pump them to slow down and stopped the pedal is actually touching the floor but it does keep it stopped. we didnt do the back brakes, coudl this be causing it?
2007-04-15 15:03:22 · 9 answers · asked by wheels47012 3 in Cars & Transportation ➔ Car Makes ➔ Chevrolet
its 3/4 ton
2007-04-15 15:04:38 · update #1
Vacuum bleed the rear brakes first to reset (unlock ) a stuck proportioning valve. Worked for me on my '75 chevelle. I bench bled the master cyl. and pumped and bled,pumped and bled with no success until I simply vacuum bled the system starting at the back. I quickly found that I was on the right track when the proportioning valve reset with a ringing Sproing!!! as I progressed. It was easy from there and a total success.
2007-04-16 08:27:14 · answer #1 · answered by racer123 5 · 0⤊ 0⤋
Well Im having the same problem with a 87 suburban I have change and bled the brakes and everything to do with the breaks Im now (tomorrow ) changing the proportion valve because the rubber inside has deterated and my is a 87 yours is a 75 most likely could be same problem
2007-04-15 15:13:41 · answer #2 · answered by Max 2 · 0⤊ 0⤋
a million examine your brake pads they could be glazed 2 examine brake adjustment too 3 you ought to need new flex hoses 4 evaluate replacing all of your brake fluid. 5 is your draw close cylinder leaking?
2016-12-04 02:36:44 · answer #3 · answered by ? 3 · 0⤊ 0⤋
you need to bleed the master before you put it in the truck, and then bleed all4 in the order of RR,LR,RF,LF. if this dosent work, bring the master back for a new one. also, if you dont get any fluid out of the rear, the perportioning valve is stuck, and you will need a new one before you can properly bleed the system
2007-04-15 15:18:15 · answer #4 · answered by Dave F 1 · 0⤊ 0⤋
Yes. Even when you're real careful, it's difficult not getting air in the lines once the system is opened.
Vacuum bleed the entire system again, including front.
2007-04-15 15:09:18 · answer #5 · answered by Anonymous · 2⤊ 0⤋
Yes definitely bleed all the brakes !!
2007-04-15 15:14:29 · answer #6 · answered by jimanddottaylor 7 · 0⤊ 0⤋
You have to bleed all four brake lines at the wheel bleeders
2007-04-15 15:07:55 · answer #7 · answered by denbobway 4 · 2⤊ 0⤋
Considering it's a chevy and you wouldn't be going that fast anyway, so who needs brakes
2007-04-15 19:50:35 · answer #8 · answered by skiddleme 1 · 0⤊ 1⤋
check the booster or the back brakes also the check for leaks
2007-04-15 17:09:35 · answer #9 · answered by pongoandfoxy1997 1 · 0⤊ 0⤋