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55BlueHeron |
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Extreme Veteran Posts: 528   Location: Medford Oregon | Since my post about the brakes going I haven't had enough time to even put a jack under the car. My several year project at work is coming to a head, and we laid new hardwood in out Living and Dining rooms. I finally had time to do some work on both the Blue Heron and the Mercedes this weekend. In addition to looking for the brake fluid leak I also haven't liked the feel of the brakes since I replaced the return springs and one wheel cylinder. The leak was easy to find; pump the brakes and look for the leak. It was just a loose pipe. Since my last work the brakes have felt spongy, like I hadn't bled them. I inspected and readjusted them with no improvement. Then I did the obvious. But first, I was taught that the way to bleed brakes was to start at the closest wheel the the master, then work out. That's what I did, and that has always worked. But, I ignored one bleed location that these other cars didn't have. It is in my last picture. The first picture is just the car on the jack. The second picture is my inspection of a wheel. It looks clean. The third picture - What car owner would let dirt and grease build up on their frame lake that! (Oh. It's me. I have some cleaning.) The fourth picture is the master cylinder. (OnJack.jpg) (CleanBrakes.jpg) (DirtyFrame.jpg) (Master.jpg) Attachments ----------------  OnJack.jpg (50KB - 129 downloads) CleanBrakes.jpg (43KB - 130 downloads) DirtyFrame.jpg (43KB - 138 downloads) Master.jpg (52KB - 134 downloads) | ||
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| 57plybel |
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Extreme Veteran Posts: 594 Location: Melbourne, Australia | |||
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| MorePar |
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 Location: Colorado, Pike's Peak | |||
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| 55BlueHeron |
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Extreme Veteran Posts: 528 Location: Medford Oregon | The way I have always done it has always worked until this time. This time it was because the master cylinder itself has a bleed nipple. All I did to fix the feel was bleed the master cylinder, not repeat the whole process. It would have made no difference which direction I had bled. I have reposted the last picture with an arrow to the bleed. I should have made the picture clearer the first time. Look at the arrow. It points to the bleed nipple. I don't know how many cars had this bleed point, but I don't remember dealing with it before. Edited by 55BlueHeron 2010-12-06 4:26 PM (Master.jpg) Attachments ---------------- Master.jpg (52KB - 134 downloads) | ||
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| 1959 Belvedere Conv |
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Elite Veteran Posts: 1107  Location: Arvada, Colorado (NW Denver Metro Area) | |||
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| 55BlueHeron |
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Extreme Veteran Posts: 528 Location: Medford Oregon | Wow. I didn't know that the order I bleed brakes was going to cause such a response! I guess I've been lucky all these years that my direction worked.  First, does the master cylinder have a bleed nipple on any of your cars? Clearly there's one on mine because it is needed. I understand that master cylinders are bench bled when new, but mine has been on the car for well over 5 years. Either direction of bleeding the brakes there is a chance of air working it's way back into what is already bled. Consider any T in the system. There is air and brake fluid in both directions. When you bleed one wheel the air is forced out from one of the tubes, but not the other. It doesn't care which is the furthest from the master cylinder. What is important is having an order of work. I did some research before responding this time. Here's an example of an answer. Begin at the corner furthest from the driver and proceed in order toward the driver. (Right rear, left rear, right front, left front.) While the actual sequence is not critical to the bleed performance it is easy to remember the sequence as the farthest to the closest. Other sites just said to follow the repair manual. | ||
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