This chapter explores sewer cleaning trucks, which are crucial for maintaining urban sanitation and effective sewer system operation. It starts with an overview, followed by a discussion of their various applications and classification schemes. The chapter reviews typical products, including 8-ton, 11-ton, and 18-ton combined sewer cleaning trucks, outlining their structure and features. Common faults and troubleshooting methods are addressed in detail, supported by a summary table illustrating frequent issues and solutions. Finally, the chapter discusses recent development trends within the field of sewer cleaning technology.