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| | | | Joined: Nov 2008 Posts: 117 'Bolter | | 'Bolter Joined: Nov 2008 Posts: 117 | Hello
looking for some input on the problem I am having with my back brakes. Everything has been replaced with new parts MC, lines, brake cylinders, pads, springs etc. I have the brakes set up as to manual specs. and have good hard pedal with about 1 1/2 - 2" of free movement at the top. The problem I am having is about after 20 minutes of driving I lose my free pedal, pedal hard right at the top with no free play and my back brakes are starting to lock up and wheel hubs are getting hot. So I re a just the pads so wheel turns freely and after they cool down the pedal goes back to having free play again, take it for another drive and does the same thing, I've done this about 3 time's now what am I missing do the pad's expand or are the cylinder's not working properly ? must admit this is my first brake job thanks for any suggestion's | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Your master cyl. push rod needs adjustment. It is keeping the piston from going back all the way to open up the port & relieve the pressure. It's also possible the emer. brake cables are adjusted too tight not letting the shoes return to the anchor.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy 46chevinline6, what you are describing is what happens when the master cylinder piston is not allowed to return to it's fully at rest position. There is supposed to be a clearance between the pedal linkage and the master cylinder piston, the brake pedal must be pushed a little before the master cylinder piston moves. One other thing that can cause the problem you describe is a plugged compensating port in the master cylinder, if you remove the cap from the master cylinder and look inside you should see two holes at the bottom of the reservoir one approximately 3/16" and the other very tiny, the tiny hole is the compensating port and it may be plugged with something, hope that helps. | | | | | Joined: Nov 2008 Posts: 117 'Bolter | | 'Bolter Joined: Nov 2008 Posts: 117 | Great thank you very much wrenchbender and 3b I will check out your suggestions and let you know what I find out | | | | | Joined: Nov 2008 Posts: 117 'Bolter | | 'Bolter Joined: Nov 2008 Posts: 117 | Hello again I took a look at the clearance between the pedal linkage and the MC and there wasn't any, so I gave it a little and took it for a good drive and it's seemed to fix the problem no more hot wheels and brakes locking up. Thanks again for taking the time to help me out it's people like you that keep the rest of us on the road. | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy 46chevinline6, I'm very glad our suggestions cured your problem. | | |
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