8-128 Periodic Maintenance and Adjustment● Using recommended brake fluid to avoid corroding rubber seals, then causing leakage andbraking function decline.Recommended brake fluid: DOT 4●Refill the same type of brake fluid. Mixed brake fluid may produce chemical reaction andaffect brake function.●Be carefully! Don’t let water go into the brake fluid container when adding new fluid. Becausewater will lower boiling point and causing possible airlock.●Brake fluid may corrode the surface of paint pray or some component made of plastic. Alwaysimmediately clean up spilled brake fluid.Replace Brake FluidBrake fluid must be replaced by Hisun service man.● Replace seals every two years.● Replace brake hoses every four years.Maintenance Cables and Lubricate