This diagram is the most common way to plumb a proportioning valve. In some cases, the right front line will be plugged off at the proportioning valve and the left front line will go to a “T” fitting. From the “T” fitting, the front lines then split off and go to the left and right wheels. Our proportioning valve has a warning light switch built in (this is not a stop light switch.) The warning light will detect any loss of pressure, for example, a leaky wheel cylinder. We recommend you wire this light into your system. Any two wire light socket will work. One wire goes to the accessory power and the other goes to the warning light. Our proportioning valves provide four functions: 1. Proportion pressure front and rear 2. 10 psi. residual check valve 3. Metering valve to apply pressure to the rear brakes before the front brakes 4. A brake warning light to detect a loss in pressure Proportioning Valve Plumbing Diagram: There are two proportioning valve lines that connect to the master cylinder provided in our kits. The first is a 90 degree bend with one leg longer than the other. This line must be oriented with the long leg connected into the front top hole of the proportioning valve and the short end in the front hole on the master cylinder. The second line has two 90 degree bends and has color coded fittings. The larger blue fitting goes into the back hole on the master cylinder and the smaller gold fitting goes into the back top hole on the proportion valve as shown in the diagram
MANUAL BLEEDING 1. Fill master cylinder. Install clear vinyl bleed hose onto left rear bleed screw. Place other end of hose in clean transparent container. 2. Partially fill a container with clean brake fluid. Submerge end of hose in fluid. Pump pedal 3-4 times and hold. Open bleed screw at least one turn. 3. Close bleed screw. Release pedal. Repeat procedure until flow of brake fluid is clear and free of bubbles. Proceed to next bleed screw of brake bleeding sequence. See BLEEDING SEQUENCE table. BLEEDING SEQUENCE PRESSURE BLEEDING Ensure pressure bleeding equipment reservoir is kept at proper level during bleeding. Follow proper bleeding sequence. See BLEEDING SEQUENCE table. Follow equipment manufacturer’s instructions for bleeding. DO NOT exceed manufacturer’s recommended pressure specifications for bleeding. Ensure master cylinder reservoir is full when finished bleeding 1. Ensure all hydraulic brake system components are properly installed and all connections are tight. Using scan tool, check Controller Anti-Lock Brake (CAB) for faults. If any faults are stored, clear CAB faults. 2. Bleed base brake system. See MANUAL BLEEDING or PRESSURE BLEEDING . After bleeding base brake system, using scan tool, select ANTILOCK BRAKES followed by MISCELLANEOUS, then BLEED BRAKES. Follow scan tool screen prompts. When scan tool displays TEST COMPLETED, disconnect scan tool. Bleed base brake system again. Top off brake fluid reservoir and verify proper brake operation before moving vehicle.