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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Brakes and Braking Systems => Topic started by: Jakethesnake73 on October 03, 2015, 07:24:16 pm

Title: Change a wheel cylinder and now i think the proportioning valve is stuck
Post by: Jakethesnake73 on October 03, 2015, 07:24:16 pm: Wasnt sure where to put this. When the truck is off the brakes firm up nicely but when its running the brake pedal goes to the floor. I can still get it to stop i just have to push the pedal all the way down to get any significant response (which is still kinda weak). Sonhow would i get this proportioning valve unstuck. Would just bleeding the front calipers bring it back to where it needs to be? 1973 k10

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Title: Re: Change a wheel cylinder and now i think the proportioning valve is stuck
Post by: Captkaos on October 07, 2015, 12:19:44 pm: Did you bleed the system after removing the caliper?
Title: Re: Change a wheel cylinder and now i think the proportioning valve is stuck
Post by: enaberif on October 07, 2015, 01:53:08 pm: Have you looked at your master cylinder to see if its not leaking?
Title: Re: Change a wheel cylinder and now i think the proportioning valve is stuck
Post by: Jakethesnake73 on October 10, 2015, 06:32:44 pm: Quote from: Captkaos on October 07, 2015, 12:19:44 pm
Did you bleed the system after removing the caliper?
never removed the caliper and i have bled the entire system at this point

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Title: Re: Change a wheel cylinder and now i think the proportioning valve is stuck
Post by: Jakethesnake73 on October 10, 2015, 06:33:54 pm: Quote from: enaberif on October 07, 2015, 01:53:08 pm
Have you looked at your master cylinder to see if its not leaking?
my master cylinder was not leaking but since it has some grime in it and my brakes already werent working i went ahead and replaced it with no luck

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Title: Re: Change a wheel cylinder and now i think the proportioning valve is stuck
Post by: Jakethesnake73 on October 10, 2015, 06:35:42 pm: New master
2 new wheel cylinder
Disc brakes in front
All 4 brakes will bleed

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Title: Re: Change a wheel cylinder and now i think the proportioning valve is stuck
Post by: Jakethesnake73 on October 10, 2015, 06:41:38 pm: Also before i replaced the first leaky wheel cylinder brakes worked great

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Title: Re: Change a wheel cylinder and now i think the proportioning valve is stuck
Post by: VileZambonie on October 10, 2015, 06:54:21 pm: Pull the drums and ensure you have everything assembled correctly and properly adjusted. Re-bleed the system after.