Sludge tipper trucks are essential equipment for urban sewage network maintenance and waste collection. Recently, a district urban management bureau in Zhengzhou procured a batch of blue-plate, 3 m³ sludge tipper trucks for the renovation project of aging urban sewer networks, to support routine sludge transportation and emergency cleanup operations. This article uses this case as a starting point, offering procurement entities a comprehensive reference solution—covering total cost of ownership (TCO) over the vehicle’s lifecycle, major overhaul intervals, depreciation characteristics of Chengli models, and common operational issues. I. Case Background and Procurement Requirements The jurisdiction of this urban management bureau includes multiple old residential communities and farmers’ markets, where sewage pipe blockages occur frequently, resulting in high demand for sludge transportation. An older tipper truck was retired due to non-compliance with emissions standards and frequent breakdowns. Per local procurement practices, the current tender explicitly specified the following requirements: blue license plate (operable with C1 driver’s license), 3 m³ payload capacity, China VI emission standard, Dongfeng chassis, hydraulic tipping system, and a budget cap of approximately RMB 133,000–166,000. Based on publicly available tender information, Chengli Special Purpose Vehicle Co., Ltd. delivered the Dongfeng D6 blue-plate, 3 m³ sludge tipper truck. Post-delivery, the vehicle is primarily deployed for: • Routine sludge transportation: Hauling from cleaning sites to treatment facilities, averaging ~15 km per trip; • Emergency response: Post-rainstorm silt removal and urgent pipeline collapse repairs; • Grid-based operations: Collaborating with vacuum trucks under a ‘separate cleaning and hauling’ model. II. Total Cost of Ownership (TCO) Analysis (5-Year / 8-Year / 10-Year) For government procurement, acquisition cost alone is insufficient—total cost of ownership must be evaluated holistically. Below is a TCO simulation based on the official announcement parameters of the Chengli CLW5070GSSD6 (Dongfeng D6 chassis, 3 m³ sludge tipper) and real-world usage data. Estimated Total Cost of Ownership for Dongfeng D6 Blue-Plate, 3 m³ Sludge Tipper Truck (Unit: RMB 10,000) Cost Item | 5 Years (60,000 km) | 8 Years (100,000 km) | 10 Years (120,000 km) -------------------------------|---------------------|----------------------|----------------------- Base Vehicle Price (per tender reference) | ~11.5 | ~11.5 | ~11.5 Purchase Tax / Registration / First-Year Insurance | ~1.2 | ~1.2 | ~1.2 Fuel Cost (8 L/100 km @ RMB 7/L) | ~3.36 | ~5.6 | ~6.72 Maintenance (every 5,000 km @ ~RMB 800/session) | ~0.96 | ~1.6 | ~1.92 Tire Replacement (6 tires @ ~RMB 2,000/tire) | ~0 | ~1.2 | ~1.2 Major Overhaul (engine/transmission/hydraulic system) | ~0 | ~1.5 | ~3.0 Annual Insurance & Vehicle Inspection (ongoing) | ~2.0 | ~3.2 | ~4.0 Total Cost of Ownership (TCO) | ~19.02 | ~25.8 | ~29.34 Residual Value (estimated resale) | ~4.0 | ~2.5 | ~1.5 Net Cost | ~15.02 | ~23.3 | ~27.84 Note: All figures above are synthesized estimates based on local procurement norms and publicly disclosed tender data. Actual costs may vary depending on fuel prices, road conditions, and operator habits. Major overhaul intervals reflect industry experience; Chengli models—benefiting from mature configurations—typically extend major overhaul cycles by 1–2 years. III. Major Overhaul Intervals and Chengli Model Characteristics Sludge tipper trucks operate in harsh environments, enduring prolonged exposure to corrosive sludge.