Lead with the conclusion: In June 2026, a municipal engineering company in Dalian City, Liaoning Province, officially accepted the Dongfeng Dual-Cab Sludge-Removal Truck (Blue License Plate, 3-cubic-meter capacity) manufactured by Chengli Special Purpose Vehicle Co., Ltd. Equipped with key features—including C-license operability, unrestricted urban access for blue-plate vehicles, a spacious 3-m³ sludge tank, and China VI emission compliance—the truck successfully resolved the client’s core challenges: “difficulty clearing aging neighborhood sewer networks, oversized vehicles unable to enter narrow residential lanes, and C-license drivers lacking suitable equipment.” The on-site acceptance proceeded smoothly; the client highly commended the vehicle’s build quality and sludge-removal efficiency, and has already planned follow-up procurement. This article, based on first-hand field reporting, dissects the entire project lifecycle—from vehicle selection to delivery—providing authentic, actionable insights for municipal authorities, property management firms, and independent operators nationwide. I. Project Background: The “Triple Challenge” of Sludge Removal in Dalian’s Aging Urban Areas In May 2026, a Dalian municipal engineering company received sludge-removal assignments for sewers and septic tanks across multiple older residential communities in Zhongshan and Xigang districts. Conventional operations faced three critical constraints: - **Vehicle Limitations**: Traditional large-scale vacuum trucks (≥12 m³) could not navigate narrow neighborhood roads, and required B-license drivers—yet over 60% of the company’s drivers held only C licenses, significantly inflating labor costs. - **Low Operational Efficiency**: Manual cleaning combined with small-capacity vacuum trucks (<2 m³) necessitated repeated sludge transfer, resulting in operational time more than three times longer than mechanized alternatives. - **Environmental Compliance Pressure**: As Dalian fully enforced China VI emission standards in 2026, older China IV/V vehicles faced driving restrictions; additionally, sludge transport mandated sealed, drip-proof containment. Through industry referrals, the client contacted Chengli Special Purpose Vehicle Co., Ltd., specifying requirements: “We need a blue-plate vehicle operable with a C license, capable of accessing aging neighborhoods, delivering high sludge-removal efficiency, and eligible for Dalian registration.” Chengli Sales Manager Zhang Yue (Tel.: ) recommended the Dongfeng Dual-Cab Sludge-Removal Truck (Blue Plate, 3 m³), tailored to the client’s operational conditions, and invited them to inspect the vehicle in person at Chengli’s automobile industrial park in Suizhou. II. Solution: Technical Breakdown of the Dongfeng Dual-Cab Sludge-Removal Truck (Blue Plate, 3 m³) The Chengli Dongfeng Dual-Cab Sludge-Removal Truck is built on the Dongfeng light-duty chassis, with official model number CLW5040TQYD6. Overall dimensions: 5995 × 1980 × 2600 mm; wheelbase: 3308 mm; powered by a Quanchai 95-hp diesel engine meeting China VI emission standards. Key technical specifications are summarized below: **Chengli Dongfeng Dual-Cab Sludge-Removal Truck (Blue Plate, 3 m³) – Technical Specifications** | Item | Parameter | Notes | |------|-----------|-------| | Chassis Brand | Dongfeng | Nationwide warranty support | | Cab Configuration | Dual-row seating (5 occupants) | Operable with C1 driver’s license | | Gross Vehicle Weight (GVW) | 4,495 kg | Blue license plate; no urban driving restrictions | | Sludge Tank Capacity | 3 m³ | Actual payload: ~2.8–3.2 m³ | | Maximum Suction Depth | ≥15 m | Standard hydraulic hose reel included | | Emission Standard | China VI | Eligible for registration nationwide | | Engine | Quanchai, 95 hp | Low fuel consumption; ample power output | | Tires | 6.50R16LT, dual rear wheels | Enhanced load-bearing capacity | | Sludge-Removal Method | Hydraulic grab bucket + vacuum pum