Home » Public Forums » GMCnet » Brake Bleeding Problem (Not Getting Any Fluid At The Wheels)
| Brake Bleeding Problem [message #257289] |
Thu, 31 July 2014 09:55  |
glenn2726
Messages: 234
Registered: June 2014
Location: Topeka, Kansas
Karma:
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Senior Member |
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Hi All, well my latest endeavor to get the brakes working is not going as planned...lol.. To begin this thread let me say that when I drove this coach home I had little to no braking as the master cylinder was dry at the bottom hole and even though I added some fluid, it didn't help. Yesterday I decided to try bleeding the lines and as the manual suggests I started with the driver side front first, that's where the problem started, no brake fluid at the bleeder valve. I removed the bleeder valve and put teflon tape on it and reinserted it and then hooked up my power brake bleeder to the valve, would not suck any fluid from the master cylinder to the bleeder valve. I checked that the proportioning valve by the driver side wheel well had the little valve on the end pressed in and it was, tried pulling it out but still no brake fluid to be found. So I went to the passenger side...sucked out old fluid but new was not being sucked from reservoir. So went back and looked at driver side wheel and brakes and could see that the brakes hadn't even been working as the disc still had rust on it from sitting so long. However the passenger side was shiny from the drive home...So, that was why there were hardly any brakes. So now my guess is that the proportioning valve is bad?? I even had my wife slowly pump the brakes in the coach to see if I could get any fluid through the system with no luck. Tried using the power brake bleeder while pumping the brakes...still no brake fluid coming through...so if my assumption is right then what part do I need and does anyone have a part number for a local parts store to use? Also that valve on the proportioning valve works how? It states in the manual to use a special tool to make sure the valve is pushed in..mine seems to be in as I can pull it out a bit which still didn't let any fluid through. Also when pumping the brake pedal noticed that the fluid in the lower reservoir would spurt up about an inch or less when pumping but not getting anything to the bleeder valves.
So as a recap, when I removed the bleeder valve at the driver side wheel there was no fluid there..and brakes hadn't been working as the disc was still rusty. When I removed the bleeder valve at the passenger side wheel there was brake fluid..but couldn't get the new fluid to the wheel by either the vacuum or by pumping the brake pedal. So before I go any further what should my next step be?? I think if I cracked the line from the master cylinder to the proportioning valve that I would get fluid there but not from the proportioning valve to the wheels? I am going to bleed the master cylinder and then try getting fluid from the proportioning valve to the wheels again but I feel it is the proportioning valve..also the lines to the disc brakes at the front look good. Thanks in advance for all your help and hopefully will get the brakes working properly soon....Glenn
Glenn W
Topeka, KS
1974 GMC 26 ft. Color:Camel Interior:Canyon Land
Side Bath, Rear Sitting Area
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