To replace the proportioning valve, the first thing one must do is take off the 2 brake pipes out of the valve while using the bleeder valve cover to prevent breaks from draining out and protect it from contamination; label and mark of the brake pipes to facilitate the installation. After that, just remove the 4 brake pipes from the valve, using caps again to avoid losing any fluid. Take off the 2 proportioning valve bracket nuts and extract the proportioning valve assembly. For installation, replace the proportioning valve assembly with the back and use the 2 bracket nuts to tighten them up to 10 Nm (89 inch lbs). After plucking out the tape marking the positions of the braking pipes, make sure you have connected the braking pipe to the braking pressure modulator valve to prevent wear lockup as the only method to detect the wear lockup is through a Scan Tool or through a braking applied stop. Subsequently, remove the caps from 4 brake pipes and attach them to the proportioning valve tightening the fittings up to 20 Nm (15ft. lbs). Lastly, take off the caps of the 2 brake pipes and attach them to the proportioning valve and tighten them also to 20 Nm (15 ft. lbs.,) and bleed the brake system.