You need to use a C-clamp to bottom the piston into the caliper bore, install the two retainers to the caliper bracket and the pads to the caliper anchor bracket, remove the support and reposition the caliper back down over the front pads, lubricate the bolt and the bolt boot, install the lower caliper bolt, remove the two-wheel lug nuts retaining the rotor to the hub, and install the tire and the wheel assembly. With the engine OFF, you can gradually apply the brake pedal to approximately 2/3 of its travel distance and slowly release the brake pedal. Wait 15 seconds, then repeat steps 10 and 11 until a firm brake pedal is obtained, fill the brake master cylinder reservoir to the proper level and burnish the pads and rotors.