Government procurement of Dongfeng D6 blue-plate 3-cubic-meter sludge tipper trucks in Baoding: A comprehensive walkthrough from vehicle selection to acceptance. In municipal sanitation operations, sludge transportation and disposal are critical components of urban精细化 management. In 2025, a municipal sanitation department (hereinafter referred to as the 'procuring entity') launched a public tender for a batch of blue-plate 3-cubic-meter sludge tipper trucks to meet sludge transfer requirements arising from small-scale wastewater treatment plants and pipeline desilting within its jurisdiction. Following multiple rounds of technical evaluation and commercial negotiations, the Dongfeng D6 chassis-based modification solution provided by Chengli Special Purpose Vehicle Co., Ltd. (hereinafter referred to as 'Chengli') was ultimately selected. This article uses this case as a reference model, addressing vehicle acceptance, parameter verification, delivery procedures, and common issues — offering procuring entities a reusable, practical guidance document. I. Ten Mandatory Inspection Items Upon Vehicle Receipt: Ensuring Compliance and Performance As a specialized sanitation vehicle, the sludge tipper truck’s acceptance criteria directly impact subsequent operational efficiency and regulatory compliance. Based on Chengli’s delivery experience with a municipal sanitation department, the following ten items constitute the core acceptance checklist: 1. Chassis Nameplate and Announcement Consistency: Verify that the chassis model (e.g., Dongfeng D6 series) matches the official MIIT announcement (e.g., CLW5120ZWXD6 or similar), with particular attention to the Vehicle Identification Number (VIN) and engine number. 2. Tank Capacity and Appearance: Conduct an on-site measurement to confirm the effective tank volume is 3 cubic meters (allowable tolerance: ±3%); inspect tank sealing integrity and anti-corrosion coating (typically epoxy resin rust-proof paint). 3. Hydraulic System: Test smoothness of the lifting mechanism’s raising/lowering operation; check for hydraulic cylinder leakage; verify hydraulic oil level and tightness of hose connections. 4. Power Take-Off (PTO) and Operation: Engage the PTO either from the cab or side-mounted control panel; confirm seamless power engagement without jamming or abnormal noise. 5. Discharge Outlet and Sealing: Inspect rear gate locking mechanisms and sealing gaskets for tightness to prevent sludge leakage during transport and avoid secondary pollution. 6. Lighting and Signal Systems: Confirm proper functionality of turn signals, brake lights, position lamps, and work warning lights (e.g., arrow lights), all compliant with GB 4785 national standards. 7. Braking and Running Gear: Perform static testing of brake pedal travel; inspect tire specifications (e.g., 7.00R16LT) and tread wear condition. 8. Onboard Documentation and Tools: Verify completeness of Certificate of Conformity, motor vehicle invoice, chassis user manual, and hydraulic system operation manual; check presence of standard safety equipment including fire extinguisher, triangular warning sign, and jack. 9. Environmental Emission Labeling: Confirm installation of a China VI-compliant engine (e.g., Dongfeng Cummins or Yuchai powertrain) and affixing of the official Environmental Information Sheet. 10. Superstructure-to-Chassis Connection: Inspect torque values and anti-loosening markings on bolts connecting the subframe to the main chassis frame to ensure long-term structural integrity without loosening. In Chengli’s delivery case, the procuring entity’s acceptance team conducted spot checks on hydraulic line sealing and identified minor oil seepage at one joint. Chengli’s after-sales technician replaced the seal on-site within just 15 minutes — demonstrating the effectiveness of Chengli’s 'Lifetime Superstructure Service' commitment. Should issues arise, customers may contact Sales Manager Zhang Yue () or call Chengli’s service h