Follow the recommended OEM manual instructions for adding brake fluid.
Clean the master cylinder cap before removing it, fill with BRAKE FLUID HD to within an inch of the top.
After fully filling with brake fluid, bleed trapped air from the system.
Check fluid levels 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 the condition of BRAKE FLUID HD with a refractometer every 6 months to determine if it needs to be replaced. Replace BRAKE FLUID HD every 12 months.