The oil in the brake lever will flow into the caliper through the oil pipe. The mold block (brake pad protection block) inside the caliper should not.
Pair HB-775E E-BIKE Hydraulic Disc Brake Set Electric Scooter Folding Mtb Bike. ZOOM HB-775E Hydraulic Disc Brake Set For Electric Scooter Folding Bike. Features: Integrated molding oil cylinder. The brake lever has been filled with oil. The mold block (brake pad protection block) inside the caliper should not be removed before the brake is installed. When not fully installed, if the mold block is removed, the piston will shift, which may cause oil leakage or the brake piston may not rebound in place.All of your order will be checked carefully before pack. If the item is defective within 1 year due to quality issue, we will repair or replace it for free(according the products). +8 Monday to Saturday 8:30-18:00.