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markeb01 · 10-22-2009, 10:01 PM

If you have disc/drum brakes on the truck, and accidentally have the disc/disc combination valve installed, spongy brakes would likely result. Without the 10 psi valve the return springs will overcome system pressure and increase initial clearance in the drum brakes.

10-22-2009, 10:01 PM	#436
markeb01 Senior Enthusiast Join Date: Feb 2007 Location: Spokane Valley, WA Posts: 8,356	Re: 66 slammed hearse If you have disc/drum brakes on the truck, and accidentally have the disc/disc combination valve installed, spongy brakes would likely result. Without the 10 psi valve the return springs will overcome system pressure and increase initial clearance in the drum brakes.