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85 Jeep CJ7, Disc front, drum rear brakes:
Long story short – Like an idiot I ran my master cylinder dry the other day. I knew my cap gasket was bad and failed to check my fluid level.
I just filled the master cylinder and started the process of bleeding the brakes – starting at the rear passenger side. Had the wife pump till tight and hold, cracked open the bleeder and got fluid/air. Repeated the process and I get nothing….repeated the process 4 or 5 more times and got nothing. Tried the rear drivers side and got nothing. Did the front and was able to bleed both sides successfully.
Why and I getting not fluid to my rear brakes?
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Wow, Never heard of this one, especially both sides!?! Have you tried using a vacuum bleeder? You could try to suck out the air/fluid rather than pumping it out. I suspect that would work. I believe you can rent one or buy one, mine was like $20.
Before anyone gets upset or says this is a bad idea yes I do know this may cause air to get into the system but what we are after is to get the fluid going.
1. If your not getting any fluid from the bleeder nipples remove them completely and then clean them out using a pick and brake cleaner.
2. Have all nipples tight except for one which is the one without fluid. Leave this one fully opened after cleaning or do this while completely remove. Push the brake pedal down and see ifnfluid comes out. If so follow normal bleeding procedure and your set.
3. If the above didn’t work remove the rubber hoses connecting the caliper to the rest of the system and see if you get fluid there. If so you probably have build up within the caliper
🙂Sounds like the proportioning valve is blocking the fluid to the rear wheels. Sometimes this is hard to correct. There should be a button on the end of the valve that you can hold out but it never seems to work.
I would suggest that you bleed the front wheels to try to reset the valve to center. You can sometime hear it pop when it resets. You can also try pumping the brake pedal aggressively and pushing hard while bleeding the front brakes.
Once it’s reset the fluid should return to the rear wheels. Pump and push gently while bleeding the rear brakes.
[quote=”wysetech” post=79355]Sounds like the proportioning valve is blocking the fluid to the rear wheels. Sometimes this is hard to correct. There should be a button on the end of the valve that you can hold out but it never seems to work.
I would suggest that you bleed the front wheels to try to reset the valve to center. You can sometime hear it pop when it resets. You can also try pumping the brake pedal aggressively and pushing hard while bleeding the front brakes.
Once it’s reset the fluid should return to the rear wheels. Pump and push gently while bleeding the rear brakes.[/quote]
As soon as I can I will have to give this a shot. Thanks!
You have to keep at it. Air is very compressible, so it can take a lot of pumps to get it all out. And again those check valve bleeders work against you here, as the air doesn’t have enough pressure to operate the valve, so you get nowhere. You have to do it the old way, closing and opening the bleeder on each pump cycle.
[quote=”grg8888″ post=79365]You have to keep at it. Air is very compressible, so it can take a lot of pumps to get it all out. And again those check valve bleeders work against you here, as the air doesn’t have enough pressure to operate the valve, so you get nowhere. You have to do it the old way, closing and opening the bleeder on each pump cycle.[/quote]
Exactly, I would not worry about the proportioning valve yet, just keep bleeding. I have replaced the metal line going from the front to the rear on many a CJ and Chevy and it takes a LONG time to get all the air out of the system and start actually bleeding.
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