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Username Post: No fluid on rear brakes/ proportioning valve not centered ?        (Topic#239342)
flowbench 
Member
Posts: 53

Loc: Germany
Reg: 08-08-05
04-04-10 02:13 PM - Post#1892791    

Hi Folks ! After replacing my rear brake lines on my 59 Chevy I realized no fluid is reaching the rear brakes So I am pretty sure the combination/ proportioning valve has tripped. According to the CPP instructions I wasn't able to solve the problem
with opening the bleeders of the front lines and pumping the brake pedal in order to shift the valve in the combination valve back in the center position. I did attach pressurized air on the rear brake lines and opened the front bleeders. No success !Also I attached a checklight to the pressure switch. It doesn't come on ! Took the swith out, pressed the plunger and voila,- then there is a connection between plunger and terminal. So the switch should work... But isn't, but should, because the rear brake line are being blocked...
Any ideas for any help ?
thanks a lot !!

 
cpptech 
Classic Performance Products "Site Sponsor"
Posts: 901
cpptech
Loc: CA. USA
Reg: 12-08-06
04-05-10 12:40 PM - Post#1893315    
    In response to flowbench

You can reset the valve manually though the upper switch position as well. Just take a small pick or paper clip and center the half moons back.
Thanks,
Aaron @ Classic Performance
800-522-5004


 
flowbench 
Member
Posts: 53

Loc: Germany
Reg: 08-08-05
04-16-10 09:51 AM - Post#1899562    
    In response to cpptech

Hi Aaron, thanks for the input but I am still stranded. I tried the idea with the paperclip with no success. I again attached an air hose directly at the rear outlet on the combination valveand opened a bleeder at the front line. I could hear air bubbles in the rear reservoir after a while but I still do have a lock up condition there. If I remove the rear brake line at the combination valve und push with a bar or something similar the valve back into the bore, would that be of any help ??
There should be something like a rubber valve on that end and I am concerned that this might damage the valve. Any ideas please ????? Thanks !!!

 
cpptech 
Classic Performance Products "Site Sponsor"
Posts: 901
cpptech
Loc: CA. USA
Reg: 12-08-06
04-19-10 06:12 AM - Post#1901104    
    In response to flowbench

You can also reset though the rear line port. Same concept with the paper clip. Remove the valve and re-bleed everything including the master cylinder on the bench.
Thanks,
Aaron @ Classic Performance
800-522-5004


 
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