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flyboy161 Samba Member
Joined: December 26, 2009 Posts: 2091 Location: Perry, GA
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zak414 Samba Member
Joined: July 30, 2013 Posts: 184 Location: Elk Grove, CA
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Posted: Mon Oct 20, 2014 11:21 am Post subject: |
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Yes I have a Bentley manual. I've followed everything outlined in there and that's why I'm here now.
I've been able to do some pressure bleeding like was suggested and I did start to see some fluid come out of the rear driver's side bleeder. At that point I decided to try to bleed that wheel cylinder. Upon doing that I noticed that I get a different feeling when pumping the pedal while bleeding the rear brakes than I do when bleeding one of the front brakes. When I bleed the front, the pedal goes down smooth until it bottoms out and I get the feeling that fluid is being pumped through the lines. However, when I try to bleed the rear, the pedal goes down and builds up pressure near the end of travel. I get this feeling whether a rear bleeder is open or closed, it is in fact the front brakes being applied.
Does that sound like a failed master cylinder? Or am I just giving up too soon on the pressure bleeding as well? _________________ 1962 Bug
40 HP Engine
28 Pict Carb rebuilt by Volkzbitz
Big Cap Distributor rebuilt by Tasb |
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scrivyscriv Samba Electrician
Joined: October 04, 2011 Posts: 2918 Location: Memphis
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Posted: Mon Oct 20, 2014 11:31 am Post subject: |
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zak414 wrote: |
Yes I have a Bentley manual. I've followed everything outlined in there and that's why I'm here now.
I've been able to do some pressure bleeding like was suggested and I did start to see some fluid come out of the rear driver's side bleeder. At that point I decided to try to bleed that wheel cylinder. Upon doing that I noticed that I get a different feeling when pumping the pedal while bleeding the rear brakes than I do when bleeding one of the front brakes. When I bleed the front, the pedal goes down smooth until it bottoms out and I get the feeling that fluid is being pumped through the lines. However, when I try to bleed the rear, the pedal goes down and builds up pressure near the end of travel. I get this feeling whether a rear bleeder is open or closed, it is in fact the front brakes being applied.
Does that sound like a failed master cylinder? Or am I just giving up too soon on the pressure bleeding as well? |
You're not done yet, keep pressure bleeding. You'll get a full pedal once all the air is out... The initial pedal travel is air compressing in the circuit.. The resistance at the end is hydraulic pressure coming up. _________________ Robert in Memphis
Dünkelgrügen 1967 Java Green bug thread
Engine rebuild thread
If you're ever in the Memphis area, you are welcome to stop by for advice and help. |
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zak414 Samba Member
Joined: July 30, 2013 Posts: 184 Location: Elk Grove, CA
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Posted: Mon Oct 20, 2014 1:29 pm Post subject: |
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Also, do you have the Bentley manual? There is a fantastic section on description & operation of the brakes. Once you wrap your mind around how the main parts function together, it will be cake. |
Completely true statement here. Once I went back to basics and started looking at things I realized what my problem was. I never realized that my brake fluid reservoir has two chambers, one for the front and one for the rear. So, the whole time I thought my reservoir was full, only the front section was therefore sending nothing but air to my rear brakes. Once I got that sorted out, bleeding the brakes took no time at all and everything is working good.
I feel very stupid for not have noticed this over the last year of owning this car. I do appreciate everyone's help to lead me to a solution and I have learned a very valuable lesson after all of this. _________________ 1962 Bug
40 HP Engine
28 Pict Carb rebuilt by Volkzbitz
Big Cap Distributor rebuilt by Tasb |
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scrivyscriv Samba Electrician
Joined: October 04, 2011 Posts: 2918 Location: Memphis
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Posted: Mon Oct 20, 2014 3:56 pm Post subject: |
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zak414 wrote: |
Quote: |
Also, do you have the Bentley manual? There is a fantastic section on description & operation of the brakes. Once you wrap your mind around how the main parts function together, it will be cake. |
Completely true statement here. Once I went back to basics and started looking at things I realized what my problem was. I never realized that my brake fluid reservoir has two chambers, one for the front and one for the rear. So, the whole time I thought my reservoir was full, only the front section was therefore sending nothing but air to my rear brakes. Once I got that sorted out, bleeding the brakes took no time at all and everything is working good.
I feel very stupid for not have noticed this over the last year of owning this car. I do appreciate everyone's help to lead me to a solution and I have learned a very valuable lesson after all of this. |
Great!! Glad to hear it. It's nice to find easy fixes like that. I make mistakes on my vw it seems like every week. Thes cars/buses are very different from most any other vehicle I've worked on and it can be tricky sometimes to work on them. _________________ Robert in Memphis
Dünkelgrügen 1967 Java Green bug thread
Engine rebuild thread
If you're ever in the Memphis area, you are welcome to stop by for advice and help. |
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