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P 30 BRAKE FAILURE L.G MORROW 8-9-09  
I HAVE 98 ALLEGRO M.H. 454 CHEV ENGINE WITH HYDRO-BOOST BRAKES HAVE FAILED COMPLETELY GO TO FLOOR WITH PETAL THREE TIMES MASTER CYLINDER FULL OF FLUID NO LEAKS ANYWHERE HAVE CHANGED MASTER CYLINDER AND HYDO-BOOST STILL HAPPENED AFTERWARDS. FIRST TIME VEHICLE HAD ABOUT 8,000 MILES SECOND TIME AT ABOUT 24,000 MILES THIRD TIME ABOUT 45,000 MILES NO DEFECTIVE PARTS EVER FOUND ALSO FEELS LIKE AIR IN SYSTEM AFTER IT HAS BEEN BLED BY ME FIRST THEN BY PROFESSIONALS DOES ANY ONE HAVE A CLUE???
THANKS L.G. MORROW (MORROWLG@CHARTER.NET)
Re: P 30 BRAKE FAILURE Bob B 8-24-09  
I have a Georgie Boy Swinger, 454, 1998 P-30 hydroboost and this has happened to me 3 times as well. The last time was last week. after driving home 90 miles they went to floor as I pulled down my road. Frnt brakes, rotors and calipers recently replaced. Thought I was done with this major problem. Also looking for answer.
Re: P 30 BRAKE FAILURE rich. 8-11-09  
Some how---the people bleeding your brakes are Not doing it correctly-are they using DOT 3 only?
Re: P 30 BRAKE FAILURE Roc 4-17-15  
After driving about 100 miles my rear wheels startsmoking when I use the brakes and driving in town. After they cool down seems like everything is ok. I am afraid of loosing my brakes when I reallyneed them what doI do ?
Re: P 30 BRAKE FAILURE Ron Hetrick 8-27-09  
1983 Pace Arrow P 30 front brakes are staying on and locking up. Is there any kind of check valve in the master cylinder ? or?
Re: P 30 BRAKE FAILURE Roy Beatty 9-27-11  
This weekend same problem, first time 1998 Flair, 454, P30, 58k miles,I've owned it for about 20k miles, I live in Fla. Today I will have replaced four calipers that appeared good, pads that looked new, master cylinder that seemed to pump great.I'm not confident that the problem is fixed, I read an article in this months Motor home Mag. Looks to me like the rubber hoses is the problem not letting fluid to pass back into the master therefore not fully releasing 1 or more of the calipers causing the overheating, I'll be buying new hoses tomorrow and hope I don't know what fixed it but it be fixed, also going to a higher heat fluid
Re: P 30 BRAKE FAILURE Ron Wimberley 1-17-10  
I have a 1997 Pace Arrow Vision powered by a Chev 454. First experienced brake failure at approx 8k miles. Replaced rotors. At the 22K mile reading, I replaced all the hoses and purged the hydraulic system. Since that time (now with 30k miles) I continue to have the same problem. When on the road and at about 100 miles into the trip the system heats up and the pedal goes to the floor. As always, after they cool down, I have good brake authority for some period of time. Can anyone help!
Re: P 30 BRAKE FAILURE Ron Kwast 9-7-09  
Hello all, I'm having the same problem as L.G.Morrow. But I do have an answer for Ron Hetrick.Open the bleeders at the calipers and try to push in the caliper pistons,just a little bit. fluid should come out and pistons should push in easily.Now tighten bleeder, and loosen brake line at rubber hose by the frame push piston again, should be just as easy. if not. Replace your front rubber flex lines at the brake calipers, flush the brake fluid out and replace front pads. I have the same model RV as you and that is what fixed mine.
Re: P 30 BRAKE FAILURE R newton 7-30-11  
I am having same problem about 100 mile let cool and they are fine.Did you ever get a fix?
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