Follow the OEM's recommended owner's manual instructions for adding brake fluid.
Clean the master cylinder cap before removing it, fill with BRAKE FLUID HD up to one inch from the top.
After fully filling with brake fluid, bleed trapped air from the system.
Check fluid level once a month.
⚠️ IMPORTANT! DO NOT use mineral oil, gasoline, or kerosene to clean the brake system and components. DO NOT reuse brake fluid from bleeding operations. For best results, check BRAKE FLUID HD condition with a refractometer every 6 months to determine if it needs to be replaced. Replace BRAKE FLUID HD every 12 months.