求翻译：油罐车每行驶800km清洗保养一次，或遇ABS反应过早，过慢时清洗保养一次。清除系统中有害的油泥漆膜，清除超高温或超低温时工作失灵的危险，有效防止制动液变质过期，彻底更换旧的制动液。是什么意思？

Oil tank truck once every 800km cleaning and maintenance, or meet the ABS response too soon, too slow cleaning again. Clearing system of harmful sludge in film, in danger of failure when clear UHT or ultra, prevents the brake fluid deterioration expired, completely replaced the old brake fluid.