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chopstyx
Active Member
14 Posts |
 Posted - 02/21/2011 : 07:33:09 AM
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Before any repairs made "driver" wrote up, pedal fading at end of brake stroke, test drove and found this to be true, also pulls hard
replaced left caliper and front rotors, pads. bleed front system
On test drive the fadi at pedal not so much.
Possible air in lines at rear, abs block air issue, or master cylinder. no abs light on or codes
As of this going to bleed rear and take for test drive, then go from there? |
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Wolf0r
Top Member
USA
2181 Posts |
Posted - 02/21/2011 : 09:14:40 AM
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| Check those brake hoses, if in doubt replace them. |
“The good thing about science is that it's true whether or not you believe in it.”
Neil deGrasse Tyson |
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stovebolt
Active Member
37 Posts |
Posted - 02/21/2011 : 10:54:40 AM
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if you stomp on the pedal and the pedal stays firm, but push slowly on the pedal and it fades you have a master cylinder issue.
I'd replace that other caliper too, I don't ever replace just one caliper on an axle, do them both to keep things balanced. Besides, if one caliper goes, how far behind is the other? |
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mastertech
Advanced Member
274 Posts |
Posted - 02/21/2011 : 1:23:08 PM
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| Sometimes a brake pad will debond and fall half way off the caliper. It can cause a pull. The backing plate will be bending over where the part of the pad is missing causing a squishy pedal. Id check the rear brake pads closely. |
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bwest
Administrator
United States
3820 Posts |
Posted - 02/23/2011 : 4:50:10 PM
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| Are we talking a full size B7 chassis? I'm leaning more toward a master cylinder/ brake booster thing. I agree with Stovebolt on the calipers too. If this is a B7 you can get those calipers for $45 and that is a cheap fix to protect children. |
Bryan |
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chopstyx
Active Member
14 Posts |
Posted - 03/07/2011 : 09:43:17 AM
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Replaced master, abs valve, module, and both rear calibers.Bled the complete system. Checked hoses, lines, ect.
Could it be the booster at the back of the master?
Pedal still fades, on brake stroke around 10 mph, then it feels
like it wants to go into abs.
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bwest
Administrator
United States
3820 Posts |
Posted - 03/07/2011 : 2:13:14 PM
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| If this is a B7 then I would say yes. |
Bryan |
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wocobus
Active Member
United States
18 Posts |
Posted - 03/08/2011 : 11:07:10 AM
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| Dose the pedal fade when the bus is not moving .If not I would cheek for a loose wheel bearing and push wheel speed sensors in |
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Gmc brake problem
