Wilwood Combination Parking Brake Caliper Rear Brake Kit - Manual (Page 6)

Additional Information and Recommendations
•NOTE: With the installation of after market disc brakes, the wheel track may change depending on the application. Check your wheel
offset before final assembly.
•Please read the following concerning balancing the brake bias on 4 wheel disc vehicles.
This Ford Mustang kit can be operated using the stock OEM master cylinder. However, as with most suspension and tire
modifications (from OEM specifications), changing the brakes may alter the front to rear brake bias. Rear brakes should not lock
up before the front. Brake system evaluation and tests should be performed by persons experienced in the installation and proper
operation of brake systems. Evaluation and tests should be performed under controlled conditions. Start by making several
stops from low speeds then gradually work up to higher speeds. Always utilize safety restraint systems while operating vehicle.
•For optimum performance, fill and bleed the new system with Wilwood Hi-Temp° 570 grade fluid or EXP 600 Plus. For severe braking
or sustained high heat operation, use Wilwood EXP 600 Plus Racing Brake Fluid. Used fluid must be completely flushed from the
system to prevent contamination. NOTE: Silicone DOT 5 brake fluid is NOT recommended for racing or performance driving.
•To properly bleed the brake system, begin with the caliper farthest from the master cylinder. Bleed the outboard bleed screw first, then
the inboard. Repeat the procedure until all calipers in the system are bled, ending with the caliper closest to the master cylinder. If the
caliper is fitted with bleed screws on four corners, make sure the bottom bleed screws are tight. Only bleed from the top bleed screws.
NOTE: When using a new master cylinder, it is important to bench bleed the master cylinder first.
•Test the brake pedal. It should be firm, not spongy, and stop at least 1 inch from the floor under heavy load.
If the brake pedal is spongy, bleed the system again.
If the brake pedal is initially firm, but then sinks to the floor, check the system for leaks. Correct the leaks (if applicable) and then
bleed the system again.
If the brake pedal goes to the floor and continued bleeding of the system does not correct the problem, either air may be trapped
in the system, or a master cylinder with increased capacity (larger bore diameter) may be required. Wilwood offers various
lightweight master cylinders with large fluid displacement capacities (custom fabricated mounting may be required).
Page 6
Brake Testing
• Make sure pedal is firm: Hold firm pressure on pedal for several minutes, it should remain in position without
sinking. If pedal sinks toward floor, check system for fluid leaks. DO NOT drive vehicle if pedal does not stay firm
or can be pushed to the floor with normal pressure.
• At very low speed (2-5 mph) apply brakes hard several times while turning steering from full left to full right, repeat
several times. Remove the wheels and check that components are not touching, rubbing, or leaking.
• Carefully examine all brake components, brake lines, and fittings for leaks and interference.
• Make sure there is no interference with wheels or suspension components.
• Drive vehicle at low speed (15-20 mph) making moderate and hard stops. Brakes should feel normal and
positive. Again check for leaks and interference.
• Always test vehicle in a safe place where there is no danger to (or from) other people or vehicles.
• Always wear seat belts and make use of all safety equipment.
WARNING • DO NOT DRIVE ON UNTESTED BRAKES
BRAKES MUST BE TESTED AFTER INSTALLATION OR MAINTENANCE
MINIMUM TEST PROCEDURE