Government procurement case of Sinotruk 24 m³ sludge tipper truck in Nanjing: Chassis selection and solution analysis. In the municipal sanitation sector, sludge transport trucks are special-purpose vehicles—chassis selection directly impacts operational efficiency, transportation cost, and regulatory compliance. Recently, a municipal sanitation department in Nanjing launched a procurement project for a batch of 24 m³ sludge tipper trucks, with a total budget of approximately RMB 1.355 million (based on publicly available tender information), planning to purchase four units at a unit price capped at around RMB 300,000. In this case, chassis selection became the central point of debate: Should Dongfeng, Sinotruk, Foton, or FAW chassis be selected? Drawing upon Chengli Special-Purpose Vehicle’s delivery experience, this article provides an in-depth analysis across three key dimensions—vehicle specifications, load-bearing capacity & off-road performance, and maintenance convenience—and includes Chengli’s recommended models and FAQs to serve as a reference for similar procurement decisions. I. Project Background and Requirements Analysis This procurement project serves multiple wastewater treatment plants and municipal pipeline desilting sites in suburban Nanjing, primarily transporting high-moisture, high-density sludge (with moisture content approx. 80%). Key requirements include: • Capacity requirement: Body effective volume of 24 m³ to ensure single-trip loading capacity and reduce transport frequency. • Chassis requirement: China VI emission standard; gross vehicle weight not exceeding 18 tons (yellow license plate); high load-bearing capacity and excellent off-road performance (to handle construction sites and slippery road conditions). • Unloading method: Hydraulic tipping mechanism requiring corrosion resistance and superior sealing performance to prevent sludge leakage. • Maintenance convenience: Nationwide chassis warranty coverage; prompt after-sales response for superstructure; short spare parts lead time. After multiple rounds of technical parameter comparison, the department ultimately selected the Sinotruk chassis as the primary configuration and entrusted Chengli Special-Purpose Vehicle for superstructure integration and delivery. The vehicles have now entered service, and customer feedback indicates stable performance under heavy-load climbing and slippery road conditions. II. Comparative Analysis of Four Major Chassis Platforms: Dongfeng, Sinotruk, Foton, and FAW For 24 m³ sludge transport trucks, commonly used chassis platforms are concentrated among Dongfeng, Sinotruk, Foton, and FAW. Below is a comparative analysis across three core dimensions: key specifications, load-bearing capacity & off-road performance, and maintenance convenience. 1. Dongfeng Chassis (Representative Model: DFH1180EX8) Advantages: High market penetration; extremely high parts interchangeability; most extensive nationwide warranty network—ideal for applications demanding rapid maintenance response. The Dongfeng Tianjin series offers relatively comfortable cab ergonomics, suitable for long-haul transport. Disadvantages: Under full 24 m³ load conditions (approx. 18-ton GVW), Dongfeng’s rear axle load capacity is slightly lower than Sinotruk’s; off-road capability (e.g., ground clearance, drive torque) on intensive muddy terrain is comparatively weaker than Sinotruk’s. Maintenance Convenience: ★★★★★ (Nationwide Dongfeng chassis warranty; lifetime service for Chengli superstructures; spare parts shipped within 24 hours) 2. Sinotruk Chassis (Representative Model: ZZ1187K511JF1) Advantages: Expertise in heavy-duty chassis; MAN-technology engines (MC series) deliver high torque and strong low-speed hill-climbing capability; high rear axle load capacity (10-ton class), ideal for heavy loads and harsh operating conditions. Under full 24 m³ sludge load, Sinotruk chassis demonstrates outstanding stability. Disadvantages: Slightly higher fuel con