The function of the scraper oil replenishment pump:1. Provide cooling oil to the system to reduce its temperature2. Maintain the pressure of the main system circuit3. Provide control pressure to the control circuit, and the system's control pressure is generally designed to be the same as the refueling pressure4. Supplement the loss of leaked oil. In order to avoid damaging the transmission in any driving and braking state, the oil replenishment pressure must be set at the specified pressure