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Old 08-10-2003, 01:08 PM   #1
Growdon
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Join Date: Dec 2002
Location: Northern California
Posts: 53
proportioning valve reset?

I lost a rear axle seal and it soaked my rear brakes on one side. The proportioning valve slipped and will only supply pressure to the rear brakes. I have replaced all the needed parts and now can't figure out how to reset the proportioning valve.

Any help would be appreciated.

Thanks,
Dean
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72 K5 CST 350/350. 4 wheel disks, 4" lift soft top. ###Sold

71 GMC Custom K2500, 3/4 ton 4x4. 350/350 ## Just bought, New Project
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Old 08-10-2003, 01:22 PM   #2
7T1BURB
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Join Date: Aug 2002
Location: Newport News, VA
Posts: 190
Proportioning Valve reset...

..is correctly done by ensuring the "pin" (located in the front of the PV) is to the rear (IN). Either by "special tool" (I made one out of an "L" shaped braket and bolted it to the PV mounting bolts or there is a real Chevrolet "Special Tool" from long ago) or clamped with big C Clamp...once the pin is secured to the rear (IN) proceed with brake bleeding process as normal...it may/usually take a few times to do the system due to air within the system. Another method is to literally "stomp" on the brake pedal and this will sometimes "center" the valve....either way should work. Ensure that you first "bench bleed" the Master Cylinder or all is for naught. Be patient...bleeding brakes is a process not rushed....hope this helps.....7T1BURB
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Old 08-10-2003, 03:54 PM   #3
Growdon
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Join Date: Dec 2002
Location: Northern California
Posts: 53
Thanks for the help, I will try it tonight
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71 GMC Custom K2500, 3/4 ton 4x4. 350/350 ## Just bought, New Project
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