Brake Troubleshooting, PMB all around |
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Brake Troubleshooting, PMB all around |
OU8AVW |
Sep 21 2014, 10:03 AM
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#1
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Yacht Rigger Group: Members Posts: 1,803 Joined: 1-October 08 From: Granbury, TX Member No.: 9,601 Region Association: Southwest Region |
So I'm getting to bleeding my brakes. I have replaced every item with parts from PMB. That's all the hard lines, soft lines and all calipers and pads. The installation was pretty easy but I'm not beyond making mistakes. The stuff has been sitting a while, installed with no fluid in the system.
Please note that I've done this on quite a few VWs so bleeding brakes is not foreign to me. I just did this exact process on my '89 Westy with good results. (IMG:style_emoticons/default/sheeplove.gif) I can get a steady stream of fluid through all bleeders both with a vacuum pump and also with pedal action I see no signs of leaks I get no pedal and it seams that the pedal won't actuate any of the calipers (More on this) with normal action. This morning I went though all the calipers and moved a considerable amount of fluid though them by pumping the pedal with similar results until.... I pumped the brakes a bunch and finally got action on the front brakes but then they were stuck. No action on the rears. I did not bench bleed the master. I did crack the hoses on the master until I got fluid from each of them. I have speed bleeders installed, so far I am not a fan. What could I have messed up in the install? Why are these things sticking? Next step? Thanks..... |
Mblizzard |
Sep 21 2014, 12:54 PM
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#2
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
You would be amazed at how air can hide in a system. It takes such a small amount of air in a system to render it useless. Doing a complete rebuild can put a lot of air in the system. For me, nothing gives you the feedback needed like attaching a clear hose to the bleeder screw and then submerging it in a clear container of brake fluid. Sometimes a zip tie is needed at the bleeder but you will be able to see even very small air bubbles as the come out. I know you did vacuum but this is worth a try before tearing everything out.
If you do this and get no air at all 4 calipers and all bleeders (both on the rears) then you have to think MC. |
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