Fuyang Dongfeng Single-Cab Sewer Cleaning Truck (Blue License Plate, 5 m³) Government Procurement Case: In-Depth Analysis of 3-Year Maintenance Records and Winning Bid Proposal In municipal sanitation vehicle procurement, sewer cleaning trucks serve as core equipment for unblocking urban drainage systems; their reliability, after-sales response speed, and long-term operating costs directly impact urban emergency response capabilities. This article takes the Chengli Dongfeng single-cab sewer cleaning truck (blue license plate, 5 m³) procured by a municipal sanitation department in Fuyang as a case study, conducting an in-depth analysis—based on its authentic 3-year maintenance records—across fault type distribution, after-sales response time, spare parts supply assurance, and more, while also interpreting the winning bid strategy and cost-control measures typical of such government procurements. I. Project Background and Procurement Overview In 2023, the Urban Management Bureau of a district in Fuyang launched a public tender to enhance urban drainage network cleaning efficiency, procuring two units of the Chengli Dongfeng single-cab sewer cleaning truck (model: CLW5070GSSD6). This model features a Dongfeng single-cab cab, qualifies for a blue license plate (drivable with Class C driver’s license), has a tank capacity of approximately 5 m³, and is equipped with a high-pressure cleaning system and hydraulic sewer cleaning device—suitable for cleaning urban rainwater inlets, inspection chambers, and pipelines. According to local procurement practices, the project’s total budget was capped at approximately RMB 391,000, with an estimated unit price of around RMB 175,000 (per publicly available tender information). Chengli Special Purpose Vehicle Co., Ltd. won the bid at approximately RMB 168,000 per unit—saving RMB 8,940–16,800 per unit compared to equivalent configurations sourced through authorized 4S dealers—demonstrating the pricing advantage of direct factory sales. II. Three-Year Operational Maintenance Records and Fault Distribution As of January 2026, these two sewer cleaning trucks have been in operation for approximately three years, accumulating over 4,000 operational hours and clearing roughly 1,500 drainage inspection chambers. A complete review of their maintenance and repair records revealed a total of 32 service entries: 18 scheduled maintenance visits and 14 unscheduled repairs. Fault Type Distribution Summary: Fault Category | Occurrence Count | Percentage | Typical Fault Description ---|---|---|--- Hydraulic System | 5 | 35.7% | Hydraulic hose fitting leakage (2 cases), aging hydraulic pump seal ring (1 case), hydraulic valve sticking (1 case), cylinder seal failure (1 case) High-Pressure Water System | 4 | 28.6% | High-pressure pump seal ring wear (2 cases), nozzle clogging (1 case), water filter clogging (1 case) Electrical System | 2 | 14.3% | Work lamp poor contact (1 case), controller module failure (1 case) Chassis Components | 2 | 14.3% | Clutch master cylinder oil leakage (1 case, covered under Dongfeng chassis warranty), brake pad wear (1 case, routine replacement) Upper-Structure Components | 1 | 7.1% | Localized peeling of internal tank anti-corrosion coating (1 case, resolved free-of-charge within warranty period) Total | 14 | 100% | — Data shows that the hydraulic and high-pressure water systems account for the highest incidence of faults—over 64% combined. This stems primarily from prolonged operation in humid, muddy environments, which accelerates corrosion and wear of hydraulic hoses and water-system sealing components. Notably, all faults fall within the scope of normal wear or consumable part replacement; no failures occurred in critical powertrain components such as the engine or transmission—indicating strong overall reliability.