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Author Topic: Never had this much trouble with brakes  (Read 14326 times)

Offline VileZambonie

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Re: Never had this much trouble with brakes
« Reply #30 on: August 30, 2015, 07:12:27 pm »
Well remember the combination valve is not only a proportioning valve but also a metering valve so they're best not messed with. You can't really test the spring pressures and it's just not worth it. They're pretty cheap now anyway. I've purchased ones on eBay with no issue.
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline roundhouse

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Re: Never had this much trouble with brakes
« Reply #31 on: August 31, 2015, 10:21:50 pm »
You replace the wheel cylinders ?
Loosen the threads at each junction Starting at the MC
And have someone mash the pedal and see if it squirts out
If it does, move on to the next one
That way you can isolate where the blockage is

The rubber lines swell up inside
Or there may be rust or some thing blocking a line

You just have to me methodical and logical in finding it


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