Government Procurement Case Study of the Dongfeng D6 Blue License Plate Sewage Treatment Vehicle in Ma'anshan and Interpretation of Spare Parts Procurement Solutions In a recent municipal sanitation vehicle renewal project completed by a municipal sanitation department in Ma'anshan, a blue license plate sewage treatment vehicle built on the Dongfeng D6 chassis drew significant attention. This model is primarily used for temporary sewage treatment and transfer operations in urban pipelines, rivers, and industrial parks. As the project commenced during winter, cold-weather starting performance, low-temperature hydraulic system stability, and convenience of spare parts procurement became the procurement party’s top concerns. This article analyzes, based on an actual delivery case, how customers resolved winter operation and maintenance challenges through Chengli Special Purpose Vehicle Co., Ltd.’s spare parts procurement services—and compares these with traditional 4S channel solutions. I. Project Background and Key Pain Points Ma'anshan lies in the lower reaches of the Yangtze River, where winter temperatures frequently drop below 0°C, accompanied occasionally by rain, snow, and freezing conditions. At the end of 2025, this municipal sanitation department launched a public tender to procure one blue license plate sewage treatment vehicle, with the following key requirements: • Cold-Weather Starting Capability: The chassis must be equipped with a low-temperature starting assistance system (e.g., pre-heating device or antifreeze coolant) to ensure reliable ignition at -10°C. • Hydraulic System Stability: Due to increased hydraulic oil viscosity at low temperatures, the system requires high-quality pipe seals and rational oil circuit design to prevent sluggish operation during winter. • Spare Parts Procurement Timeliness: As this is a special-purpose vehicle, OEM spare parts typically involve long lead times. The procurement party required the supplier to guarantee 24-hour direct shipment service to avoid vehicle downtime caused by spare parts shortages. • Budget Control: According to local procurement conventions, the unit price of blue license plate vehicles must remain within approximately RMB 300,000 (per publicly available tender information), while spare parts pricing must be transparent. After multiple rounds of evaluation, Chengli Special Purpose Vehicle Co., Ltd. was selected to supply the Dongfeng D6 blue license plate sewage treatment vehicle, with chassis model CLW5070GSSD6 (referencing MIIT announcement parameters), along with a comprehensive spare parts procurement plan. II. List of Commonly Replaced Components and Pricing Transparency Government procurement emphasizes 'total lifecycle cost'—not only the initial purchase price but also post-purchase operational support, especially spare parts availability. Based on this project, Chengli provided the customer with a list of commonly replaced components and committed to full pricing transparency—no hidden fees. Below is a list of typical wear-and-tear components for this vehicle model and their reference prices (based on Chengli’s spare parts supply system and industry benchmarks): Dongfeng D6 Blue License Plate Sewage Treatment Vehicle – Common Wear-and-Tear Components and Reference Prices | Component Name | Specification/Model | Function | Reference Unit Price (RMB/piece) | Recommended Replacement Interval | |----------------|---------------------|----------|-----------------------------------|-------------------------------| | Hydraulic Oil Filter Element | CLW5070GSSD6-specific | Filters impurities from hydraulic system | ~80–120 | Every 6 months or 500 operating hours | | Sewage Pump Seal Kit | Corrosion-resistant type | Prevents sewage leakage | ~150–200 | Every 12 months or as condition dictates | | Low-Temperature Starting Glow Plug | Dongfeng D6 OEM | Auxiliary cold-weather engine start | ~60–90 | Every 2 years or upon starting difficulty | | Hydraulic