Brake problems
OK I gurss I didn't state the facts correctly. We do not have any
brakes in our jeep. We have changed hoses, mc, p. valve, booster, bleeding between each component change. We have been working on this issue for many moths now and don't seem to be getting anywhere. we get excellent front pressure but no back pressure. Please help |
Re: Brake problems
Sue did pass the time by typing:
> OK I gurss I didn't state the facts correctly. We do not have any > brakes in our jeep. We have changed hoses, mc, p. valve, booster, > bleeding between each component change. We have been working on this > issue for many moths now and don't seem to be getting anywhere. we get > excellent front pressure but no back pressure. Please help http://www.familycar.com/brakes.htm Your "combination valve" or "proportioning valve" has a metal pin that will slide to shut off what it thinks is a brake line failure in either the front or rear brakes. When bleeding some systems you need to use one of these http://www.sjdiscounttools.com/otc7853.html to keep the pin from sliding back. Depending on the valve you might be able to re-bleed the front to move the valve forward, then catch it in the middle. Generally I use a vac bleeder for brakes, this overcomes the problem with proportioning valves sliding. Read here. It fairly much covers your problem http://www.hotrodders.com/forum/disk...kes-12861.html -- DougW |
Re: Brake problems
Sue did pass the time by typing:
> OK I gurss I didn't state the facts correctly. We do not have any > brakes in our jeep. We have changed hoses, mc, p. valve, booster, > bleeding between each component change. We have been working on this > issue for many moths now and don't seem to be getting anywhere. we get > excellent front pressure but no back pressure. Please help http://www.familycar.com/brakes.htm Your "combination valve" or "proportioning valve" has a metal pin that will slide to shut off what it thinks is a brake line failure in either the front or rear brakes. When bleeding some systems you need to use one of these http://www.sjdiscounttools.com/otc7853.html to keep the pin from sliding back. Depending on the valve you might be able to re-bleed the front to move the valve forward, then catch it in the middle. Generally I use a vac bleeder for brakes, this overcomes the problem with proportioning valves sliding. Read here. It fairly much covers your problem http://www.hotrodders.com/forum/disk...kes-12861.html -- DougW |
Re: Brake problems
Sue did pass the time by typing:
> OK I gurss I didn't state the facts correctly. We do not have any > brakes in our jeep. We have changed hoses, mc, p. valve, booster, > bleeding between each component change. We have been working on this > issue for many moths now and don't seem to be getting anywhere. we get > excellent front pressure but no back pressure. Please help http://www.familycar.com/brakes.htm Your "combination valve" or "proportioning valve" has a metal pin that will slide to shut off what it thinks is a brake line failure in either the front or rear brakes. When bleeding some systems you need to use one of these http://www.sjdiscounttools.com/otc7853.html to keep the pin from sliding back. Depending on the valve you might be able to re-bleed the front to move the valve forward, then catch it in the middle. Generally I use a vac bleeder for brakes, this overcomes the problem with proportioning valves sliding. Read here. It fairly much covers your problem http://www.hotrodders.com/forum/disk...kes-12861.html -- DougW |
Re: Brake problems
Much better thanks. I am not physic....
So you have front brakes but no working rear brakes, right? Did you change the hose between the rear axle and the frame? It can delaminate and swell up inside causing no rear brake pressure. Are you holding the pin steady in the combination valve when bleeding the rear brakes? One kind has a pin you need to hold in, the other kind has a pin you hold out and one kind has no pin at all so you do nothing. Watch the pin while someone pushes on the pedal so you can see which way it moves. For the ones that push out I use a penny and a clamp to hold it. The one that sucks in I use a mini vise grip to hold it out. There are special tools for this as well. You implied in the other thread that you bled the Master cylinder. Was this done on the bench or in the vehicle? Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) Sue wrote: > > OK I gurss I didn't state the facts correctly. We do not have any > brakes in our jeep. We have changed hoses, mc, p. valve, booster, > bleeding between each component change. We have been working on this > issue for many moths now and don't seem to be getting anywhere. we get > excellent front pressure but no back pressure. Please help |
Re: Brake problems
Much better thanks. I am not physic....
So you have front brakes but no working rear brakes, right? Did you change the hose between the rear axle and the frame? It can delaminate and swell up inside causing no rear brake pressure. Are you holding the pin steady in the combination valve when bleeding the rear brakes? One kind has a pin you need to hold in, the other kind has a pin you hold out and one kind has no pin at all so you do nothing. Watch the pin while someone pushes on the pedal so you can see which way it moves. For the ones that push out I use a penny and a clamp to hold it. The one that sucks in I use a mini vise grip to hold it out. There are special tools for this as well. You implied in the other thread that you bled the Master cylinder. Was this done on the bench or in the vehicle? Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) Sue wrote: > > OK I gurss I didn't state the facts correctly. We do not have any > brakes in our jeep. We have changed hoses, mc, p. valve, booster, > bleeding between each component change. We have been working on this > issue for many moths now and don't seem to be getting anywhere. we get > excellent front pressure but no back pressure. Please help |
Re: Brake problems
Much better thanks. I am not physic....
So you have front brakes but no working rear brakes, right? Did you change the hose between the rear axle and the frame? It can delaminate and swell up inside causing no rear brake pressure. Are you holding the pin steady in the combination valve when bleeding the rear brakes? One kind has a pin you need to hold in, the other kind has a pin you hold out and one kind has no pin at all so you do nothing. Watch the pin while someone pushes on the pedal so you can see which way it moves. For the ones that push out I use a penny and a clamp to hold it. The one that sucks in I use a mini vise grip to hold it out. There are special tools for this as well. You implied in the other thread that you bled the Master cylinder. Was this done on the bench or in the vehicle? Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) Sue wrote: > > OK I gurss I didn't state the facts correctly. We do not have any > brakes in our jeep. We have changed hoses, mc, p. valve, booster, > bleeding between each component change. We have been working on this > issue for many moths now and don't seem to be getting anywhere. we get > excellent front pressure but no back pressure. Please help |
Re: Brake problems
On Sat, 20 May 2006 17:19:35 UTC "Sue" <reedservices@valuelinx.net>
wrote: > OK I gurss I didn't state the facts correctly. We do not have any > brakes in our jeep. We have changed hoses, mc, p. valve, booster, > bleeding between each component change. We have been working on this > issue for many moths now and don't seem to be getting anywhere. we get > excellent front pressure but no back pressure. Please help > That's a little better, but not a lot. You could be having problems with the proportioner valve being off center divertiing all the pressure to the front or, if you have one, the load sensing anti-lock valve on the rear end being shot/mis-adjusted. -- Will Honea |
Re: Brake problems
On Sat, 20 May 2006 17:19:35 UTC "Sue" <reedservices@valuelinx.net>
wrote: > OK I gurss I didn't state the facts correctly. We do not have any > brakes in our jeep. We have changed hoses, mc, p. valve, booster, > bleeding between each component change. We have been working on this > issue for many moths now and don't seem to be getting anywhere. we get > excellent front pressure but no back pressure. Please help > That's a little better, but not a lot. You could be having problems with the proportioner valve being off center divertiing all the pressure to the front or, if you have one, the load sensing anti-lock valve on the rear end being shot/mis-adjusted. -- Will Honea |
Re: Brake problems
On Sat, 20 May 2006 17:19:35 UTC "Sue" <reedservices@valuelinx.net>
wrote: > OK I gurss I didn't state the facts correctly. We do not have any > brakes in our jeep. We have changed hoses, mc, p. valve, booster, > bleeding between each component change. We have been working on this > issue for many moths now and don't seem to be getting anywhere. we get > excellent front pressure but no back pressure. Please help > That's a little better, but not a lot. You could be having problems with the proportioner valve being off center divertiing all the pressure to the front or, if you have one, the load sensing anti-lock valve on the rear end being shot/mis-adjusted. -- Will Honea |
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