COM86 Posted July 16, 2019 Share Posted July 16, 2019 Ugg, 1986 jeep Comanche. 2.5 5 speed 4x4. I just did a wj dual brake booster swap. And a 8.8 axle swap too. I can bleed the rear brakes fine. Left front also. But the right front, %#×@+@%!!!! I took out the booster, and the master cylinder. To access the distribution block. I undid the right side brake line and blew it our with an air compressor. Re assembled it. Still can't get fluid to the front right. Can a distribution block get plugged? Is it a dealer item only? Link to comment Share on other sites More sharing options...
DirtyComanche Posted July 17, 2019 Share Posted July 17, 2019 Where do you get fluid to? Did the line actually blow out, or did it seemed blocked? The line for the right front is prone to being damaged during engine removal/install. Link to comment Share on other sites More sharing options...
COM86 Posted July 17, 2019 Author Share Posted July 17, 2019 (edited) 15 minutes ago, DirtyComanche said: Where do you get fluid to? Did the line actually blow out, or did it seemed blocked? The line for the right front is prone to being damaged during engine removal/install. I removed the line from the proportion valve and blew it out with the air compressor. First, it seemed to be blocked but then it opened up. I really think, after some research, that it's the valve. I also installed a 8.8 axle with discs, so my proportion valve was running disc front and drum rear. Now 4 wheel discs. No engine replacement. I'm looking into getting a Jeggs 4 wheel discs distribution block. Edited July 17, 2019 by COM86 Additional information Link to comment Share on other sites More sharing options...
Eagle Posted July 17, 2019 Share Posted July 17, 2019 25 minutes ago, COM86 said: I removed the line from the proportion valve and blew it out with the air compressor. First, it seemed to be blocked but then it opened up. I really think, after some research, that it's the valve. There is no valve. The front distribution block in the MJ is a distribution block, not a proportioning valve. I also installed a 8.8 axle with discs, so my proportion valve was running disc front and drum rear. Now 4 wheel discs. No engine replacement. I'm looking into getting a Jeggs 4 wheel discs distribution block. Again -- there is no valve. How are your front flex hoses? If they are the originals, they may have deteriorated internally and a flap of rubber could be interfering with the fluid flow. Link to comment Share on other sites More sharing options...
COM86 Posted July 17, 2019 Author Share Posted July 17, 2019 Ok. 3 minutes ago, Eagle said: There is no valve. The front distribution block in the MJ is a distribution block, not a proportioning valve. Again -- there is no valve. How are your front flex hoses? If they are the originals, they may have deteriorated internally and a flap of rubber could be interfering with the fluid flow. Ok thank you. They are Factory original equipment. Would a 1989 Cherokee 4.0 work? Link to comment Share on other sites More sharing options...
cruiser54 Posted July 17, 2019 Share Posted July 17, 2019 Yes. But you should go braided stainless at some point. Link to comment Share on other sites More sharing options...
COM86 Posted July 17, 2019 Author Share Posted July 17, 2019 But here's what I don't understand. The blockage is near the distribution block. I blew out the block and the brake line. Resemble still no fluid, removed the brake hose from the ridged metal line and still no fluid. So the distribution block must be still plugged?. Link to comment Share on other sites More sharing options...
COM86 Posted July 17, 2019 Author Share Posted July 17, 2019 9 hours ago, Eagle said: Looking at this picture and seeing the rubber o rings, I bet the "O" rings have deteriorated and is causing this issue. Link to comment Share on other sites More sharing options...
COM86 Posted July 17, 2019 Author Share Posted July 17, 2019 I am thinking of buying this, https://www.jegs.com/i/JEGS/555/631292/10002/-1 Link to comment Share on other sites More sharing options...
Dzimm Posted July 17, 2019 Share Posted July 17, 2019 Your next step would be to take the line off the distribution block to see if fluid comes out. You don't want to replace the distribution block if you don't have to. Link to comment Share on other sites More sharing options...
COM86 Posted July 18, 2019 Author Share Posted July 18, 2019 Well, I re bleed the brakes this morning and now it repaired it self. Maybe after the trial drive yesterday, dislodging what ever it was. Just Every Effort Problem (Jeep) Link to comment Share on other sites More sharing options...
Eagle Posted July 18, 2019 Share Posted July 18, 2019 On 7/17/2019 at 10:06 AM, COM86 said: Looking at this picture and seeing the rubber o rings, I bet the "O" rings have deteriorated and is causing this issue. The rubber O-rings ONLY affect the shuttle valve (that slider across the top) that activates the brake warning light. They have nothing to do with controlling the brakes, and they cannot block the flow of brake fluid to the front wheels. The Cherokee unit IS a proportioning valve. You can use one, but you'll have to re-plumb the rear lines, and you'll be giving up the rear height sensing valve. Link to comment Share on other sites More sharing options...
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