New proportioning valve and problems !

[amach_one]

Hi all, today a new problem :

I have just changed the proportioning valve and I have the brake light which stays on all the time even though I have brakes on all 4 wheels, the new oil level in the master cylinder and no leaks...I am worried because I read somewhere that the brakes could lock up ! Is it really possible that the brakes are locking up because of the proprtioning valve?

Thank you for your opinions and advices !!

 

[Sheriff41]

 

[amach_one]

View attachment 90103

I did that but no good result !

 

[amach_one]

May be it can help somebody , here you have many explanation about the proportioning valve, but unhapilly for me no more results...

https://www.speedwaymotors.com/the-...lve-reset-symptoms-bleeders-adjustment/134183

 

[Bentworker]

Try bleeding the circuits again and then give the pedal a good stomp or two. Press on it like a deer jumped in front of your car.

 

[Hemikiller]

The procedure Sheriff posted is for a factory installed proportioning valve. If you have one from an aftermarket manufacturer, anything is possible. I've never had an issue centering the valve simply by bleeding the brakes.

 

[roboconklin]

Hi all, today a new problem :

I have just changed the proportioning valve and I have the brake light which stays on all the time even though I have brakes on all 4 wheels, the new oil level in the master cylinder and no leaks...I am worried because I read somewhere that the brakes could lock up ! Is it really possible that the brakes are locking up because of the proprtioning valve?

Thank you for your opinions and advices !!

If you removed the front brake calipers,make sure the bleeders point twards the rear brakes as the bleeder port skims beside the piston bore. If you point them up ,you’ll never get even most of the air. If you only did the proportioning valve as stated,follow the above mentioned valve centering instructions. Some aftermarket valves require a centering tool. It’s available on Amazon. Persistence is the key. Don’t drive with spongy brakes..

 

[amach_one]

I finally think i will redo my original proportioning valve with the kit and the screw tool necessary i yet ordered for avoiding that the piston move during the next bleeding ! Thank you all !

 

[Charlie71]

I had the same problem. I bought a new positioning valve from NPD that came with the switch and had still had the light coming on. I bought another replacement switch from NPD and continued to have the problem. Then I bought a genuine Ford switch and discovered that the plunger on the switch was shorter than the one from NPD and the problem was solved. If you used a switch from NPD (I've seen the same switch on other websites) its a Chinese knock off that is not made per the original specifications. I recommend searching for a genuine Ford switch.

 

[ROCKET70]

Have you changed the rear flex hose? I ran into that problem and it was the rear flex hose.

 

[amach_one]

I had the same problem. I bought a new positioning valve from NPD that came with the switch and had still had the light coming on. I bought another replacement switch from NPD and continued to have the problem. Then I bought a genuine Ford switch and discovered that the plunger on the switch was shorter than the one from NPD and the problem was solved. If you used a switch from NPD (I've seen the same switch on other websites) its a Chinese knock off that is not made per the original specifications. I recommend searching for a genuine Ford switch.

Indeed before changing the proportioning valve I am waiting for a NOS switch that I found on eBay. I hope that's the problem! I don't know if I bought on NPD or elsewhere but one thing is certain: it's Chinese...to be continued! THANKS !

 

[NOT A T5]

Chinese Knock Off...who would have known!

 

[Sheriff41]

If you still have your original, you should rebuild it. They're easy enough to overhaul ()
Kit: https://www.musclecarresearch.com/valve-kit-kh
Tool (optional): https://www.musclecarresearch.com/brake-valve-tool

 

[amach_one]

I finally received a NOS warning light switch and now It's always on but when I brake it goes off....no leakage and the four wheels are braking...any idea ?? Anyway thank you !

 

[ROCKET70]

Might still have some air in the system.