I. Case Background: Municipal Sanitation Department in Luoyang Procures 24-m³ Sludge Tipper Trucks In 2025, the Urban Management Bureau of a district in Luoyang City, Henan Province (hereinafter referred to as the 'Purchaser') issued a public tender notice for the procurement of a batch of sludge tipper trucks, intended for the enclosed transportation of sewage plant sludge, river sediment, and industrial sludge. Key requirements included: cargo body capacity ≥24 m³; compliance with China VI emission standards; chassis with high load-bearing capacity suitable for urban roads and partially unpaved surfaces; and convenient maintenance and service. The budget was controlled at approximately RMB 511,000–550,000 per unit (based on publicly available tender information), with a tender period of 30 days. During preliminary research, the Purchaser evaluated mainstream chassis brands including Dongfeng, Sinotruk, Foton, FAW Jiefang, and Shaanxi Automobile. Ultimately, Chengli Special Purpose Vehicle Co., Ltd. won the bid with its Sinotruk chassis + Chengli superstructure solution, delivering six 24-m³ sludge tipper trucks. This article provides an in-depth analysis of the case from perspectives including chassis selection, load-bearing capacity and off-road performance, service/maintenance convenience, Chengli’s flagship models, and frequently encountered issues. II. Chassis Selection Comparison: Advantages and Disadvantages of Dongfeng / Sinotruk / Foton / FAW Jiefang The core requirements for sludge tipper truck chassis are: high load-bearing capacity (24 m³ sludge weighs approx. 20–25 tons), strong off-road capability (for entering/exiting sludge treatment facilities), low failure rate, and convenient maintenance. The table below compares Dongfeng, Sinotruk, Foton, and FAW Jiefang chassis options for 24-m³ sludge tipper trucks, based on Chengli’s product database and MIIT announcement parameters (e.g., model CLW5180GSSD6): Comparison Table: Dongfeng / Sinotruk / Foton / FAW Jiefang Chassis (for 24-m³ Sludge Tipper Trucks) | Item | Dongfeng (Tianlong / Tianjin Series) | Sinotruk (Howo / Sitrak Series) | Foton (Ouman Series) | FAW Jiefang (J6 / J7 Series) | |------|--------------------------------------|----------------------------------|------------------------|------------------------------| | Engine Model | Cummins / Yuchai, 6-cylinder | Sinotruk MC-series, 6-cylinder | Foton Cummins / Weichai, 6-cylinder | FAW Power, 6-cylinder | | Max. Horsepower (Typical Config.) | 220–270 HP | 250–320 HP | 240–300 HP | 260–310 HP | | Frame Strength | 280 mm, double-layer | 300 mm, triple-layer | 280 mm, double-layer | 300 mm, double-layer | | Max. Payload (Announced) | 18-ton class (GVWR: 25 tons) | 25-ton class (GVWR: 31 tons) | 18-ton class (GVWR: 25 tons) | 18-ton class (GVWR: 25 tons) | | Ground Clearance (Min.) | 250 mm | 280 mm | 260 mm | 270 mm | | Service/Maintenance Convenience | Extensive nationwide authorized service network | Moderate network; specialized heavy-duty truck repair centers | Moderate network | Limited network, primarily in northern China | | Typical Application Scenarios | Urban roads, light-duty operations | Heavy-duty operations, unpaved surfaces | Medium- to long-distance transport | Inter-provincial long-haul transport | According to feedback from the Purchaser in this case, Sinotruk chassis offer distinct advantages: the triple-layer frame and 300-mm frame strength provide enhanced safety when carrying the self-weight of 24 m³ sludge (approx. 20–25 tons); the minimum ground clearance of 280 mm better accommodates uneven, pothole-ridden terrain commonly found at sludge treatment sites; and the Sinotruk MC-series engine demonstrates excellent reliability and low failure rates under heavy-load conditions. While Dongfeng chassis lead in terms of service network coverage, their lower payload capacity renders them unsuitable for prolonged heavy-duty operation.