Harold M Posted August 7, 2009 Report Share Posted August 7, 2009 I,m having troub le getting the air out of the brake system on 47 plymouth I,ve run 2 qts of fluid thru it and pedal is still spunge Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted August 7, 2009 Report Share Posted August 7, 2009 Do you have a leak anywhere in the system? Quote Link to comment Share on other sites More sharing options...
Harold M Posted August 7, 2009 Author Report Share Posted August 7, 2009 no leaks i just rebuilt all of the cyl and master cyl you can stand on the pedal an d hold as long as you want and no sign of leaks Quote Link to comment Share on other sites More sharing options...
Merle Coggins Posted August 7, 2009 Report Share Posted August 7, 2009 The brakes can still feel spongy even with no air in the system if the shoes aren't adjusted right. I would suggest readjusting the brakes and try it again. At least that's been my experience. Merle Quote Link to comment Share on other sites More sharing options...
Harold M Posted August 7, 2009 Author Report Share Posted August 7, 2009 I.ve reaadjused the brakes twice and have them set as tight as i can I seem to still get some air i,ll just keep pumping fluid thru it . maybe i,ll have to borrow a pressure bleeder thanks for the help Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted August 7, 2009 Report Share Posted August 7, 2009 The real test is if you push the pedal first thing in the morning having not pushed it for 10-12 hours. If you have air in the system the pedal will go to the floor but you will be able to pump it up. If you have no air the pedal will feel the same way it felt the day before. Quote Link to comment Share on other sites More sharing options...
Harold M Posted August 7, 2009 Author Report Share Posted August 7, 2009 thanks Don and Merle Quote Link to comment Share on other sites More sharing options...
P-12 Tommy Posted August 7, 2009 Report Share Posted August 7, 2009 I.ve reaadjused the brakes twice and have them set as tight as i can I seem to still get some air i,ll just keep pumping fluid thru it . maybe i,ll have to borrow a pressure bleeder thanks for the help Harold, pressure bleed them. I had the same problem. Once I pressure bled them, then I readjusted the brakes and I got an excellent pedal. Still do and it's been a couple of monthes. Remember your freeplay.Tom Quote Link to comment Share on other sites More sharing options...
Guest P15-D24 Posted August 7, 2009 Report Share Posted August 7, 2009 If you have low but firm pedal, it's shoe adjustment. Low pedal and you pump it and it get higher and firmer, you have air in the system. Then pressure bleed. If after 2 or 3 go arounds on all bleeders it is still not firm start looking for a leak cause you have one. Quote Link to comment Share on other sites More sharing options...
greg g Posted August 8, 2009 Report Share Posted August 8, 2009 Or you can try the reverse bleed which introduces fluid under slight pressure through the bleeders bakc to the M/C where entraped air will vent to the atmosphere. You do need a pressure bleeder and a trukey baster or some other means to remove excess fluid from the M/C. The process is reverse of normal bleeding starting at the wheel furthest from the M/C. Quote Link to comment Share on other sites More sharing options...
grey beard Posted August 15, 2009 Report Share Posted August 15, 2009 Here's the simplest way to bleed brakes. Find an extra master cylinder cap and drill and tap it to 3/8-inch NPT. Go to the hardware and buy a 3/8-inch NPT hose adaptor. Thread it into the cap. Fill up youre master cylinder. Now take your old garden sprayer and pull the wand off the hose. Stick the hose on your NPT hose adaptor on top of the master cylinder. Now pump up about five or six strokes with the garden sprayer. What you are doing is putting a few psi of pressure on top of the brake fluid in the master cylinder. Now go around all four corners and crack each bleeder in turn. Hold a rag under it and just let any air out. It takes longer to type all this than it does to bleed all four conrers of a Pilothouse truck. Contrary to popular belief, you don't need to put brake fluid in your pressure bleeder. You are just using the garden sprayer for an air pump, and just a very few pounds of pressure, at that. Don't put any brake fluid into the garden sprayer. It's just an air pump for this job. AND, contrary to MORE popular belief. when you pressure bleed a brake system in this fashion, it matters not one whit what corner you begin or end on. Just get all six bleeders while you have pressure on the fluid. When you're finished, there will be no air in your system, and you will still have a usable, uncontaminated garden sprayer. Oh, and don't forget to put the wand back on your sprayer, for when the little woman wants to use it on her flowers, 'er whatever. 2 Quote Link to comment Share on other sites More sharing options...
DigmyP18 Posted August 22, 2009 Report Share Posted August 22, 2009 Hey Normspeed, exactly where was that brake light Switch located? I'm trying to find mine on my P18 and I can't find that bad boy. I found the junction in the front but that's about it. Thanks any and all. Quote Link to comment Share on other sites More sharing options...
DigmyP18 Posted August 23, 2009 Report Share Posted August 23, 2009 Scratch that folks, I really have to get rid of that tunnelvision when fixing stuff. For anybody that doesn't know, the brake light switch on the 49 p18 is located inside the left framerail just ahead of the axle. Quote Link to comment Share on other sites More sharing options...
Guest P15-D24 Posted August 23, 2009 Report Share Posted August 23, 2009 Clean off EVERY single joint with brake cleaner. Make sure they are dry. Then put a pressure bleeder on and pressurize the system. Wait 10 minutes then inspect each joint for weeps or leaks. I've seen cracks in "T" fittings like on the rear axle vent. Be systematic with your search and inspection. If the system is air tight is should take no more than 2-3 passes to bleed. And inspect EVERY joint and fitting. I you have the original stock lines you all need to inspect them. If they are rusty, replace with new. Quote Link to comment Share on other sites More sharing options...
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