I. Project Background and Operating Condition Analysis: Sludge Transportation Requirements in Light-Duty Municipal Applications In Q3 2025, a municipal sanitation department in Xuchang issued a public tender for a batch of compact sludge tipper trucks to address sludge transportation challenges arising from urban pipeline desilting. The primary objective of this procurement was to resolve sludge transfer difficulties in narrow areas such as old residential communities and alleyways. Per local procurement practices, the project budget was capped at approximately RMB 387,000, with plans to acquire three blue-license-plate, 3-cubic-meter sludge tipper trucks. Following multiple rounds of technical evaluation and commercial negotiations, Chengli Special Purpose Vehicle Co., Ltd.‘s Dongfeng D6 chassis-based, blue-license-plate, 3-cubic-meter sludge tipper truck solution was ultimately selected. This solution is specifically engineered for light-duty municipal operating conditions and fully meets the customer’s requirements for maneuverability, passability, and sealing performance. Vehicles procured under this project are primarily intended for: • Light-duty municipal operations: Urban roads, internal community roads, and narrow alleyways. • Sludge type: High-moisture domestic sewage sludge and pipeline desilting sludge, containing trace amounts of sand and gravel. • Transport distance: Approx. 10–15 km per trip, requiring frequent loading/unloading. Key customer requirements include: Blue license plate operable with Class C driver’s license; overall vehicle height ≤2.1 m (to comply with underground garage height restrictions); excellent sealing performance to prevent leakage; and reliable tipping functionality. II. Solution Specifications and Targeted Matching: Dongfeng D6 Chassis + Chengli Bodywork Based on the operational analysis, the Chengli team recommended the Dongfeng D6 chassis (model reference: CLW5070GSSD6, same platform design) paired with a Chengli-customized sludge tipper body. Key parameter comparisons and matching rationale are outlined below: | Item | Customer Requirement | Chengli Recommended Solution | Matching Advantages | |------|----------------------|------------------------------|---------------------| | Chassis Model | Blue license plate; moderate wheelbase; high load capacity | Dongfeng D6 (wheelbase: 3,308 mm) | Blue license plate compatible with Class C driver’s license—ensures unrestricted urban road access; short wheelbase enables small turning radius, ideal for narrow streets | | Engine | China VI emission compliance; sufficient power output | Quanchai Q23-136E60 (136 hp) | Meets China VI emission standards; delivers ample power for loaded uphill operation | | Cargo Box Volume | ~3 m³ | 3.0–3.2 m³ (custom-welded body) | Complies with tender volume requirement without exceeding legal payload limits | | Tipping Mechanism | Hydraulic tipping; simple operation | Single-cylinder hydraulic lift + rear-tipping configuration | Simple, robust structure optimized for sludge discharge | | Sealing System | Leak-proof; odor-free | Fully sealed rear door + rubber compression gasket + wastewater collection trough | Effectively prevents wastewater dripping during transport, ensuring environmental compliance | | Overall Vehicle Height | ≤2.1 m | Approx. 2.05 m (optimized per official announcement parameters) | Enables entry into most underground parking garages and height-restricted zones | | Delivery Lead Time | Within 15 days | 10–12 days (standard model, zero inventory — immediate shipment) | Meets customer’s urgent deployment requirements | | After-sales Service | Nationwide chassis warranty; lifetime bodywork service | Dongfeng chassis covered under nationwide warranty + Chengli bodywork lifetime service | Spare parts shipped directly within 24 hours, minimizing downtime risk | | Price (per publicly disclosed tender data) | Budget cap: ~RMB 387,000 (for 3 units) | Unit price: ~RMB 110,000–118,000/unit (tax-inclu