• Do not mix different types of fluid, as they are not compatible with each other.• Do not allow foreign material to enter the system when filling the reservoir.• A low fluid level may be due to wear of the brake pads. If the brake pads are worn, the caliper piston is pushed out, and this accounts for a low reservoir level. If the brake pads are not worn and the fluid level is low, check entire system for leaks (page 3-20).