16. BRAKE SYSTEM UXV 500 Parking Brake Case Install the parking brake case and two bolts. Tighten the bolts securely. Piston Seal/Dust Seal Apply silicone grease to the new piston seal and new dust seal, then install them. Install the piston. Piston Dust Boot Apply silicone grease to the brake shaft, then install it. Apply silicone grease to the dust boot, then install it. Brake Shaft 16-24