Chengli Special Automobile Co., Ltd. provides a comprehensive guide on operating and maintaining sewage suction and cleaning trucks. Proper use and regular maintenance not only enhance vehicle safety and performance but also extend service life and reduce maintenance costs.
Engine Operation and Maintenance
For optimal engine performance, the first maintenance should be done at a service station after driving 2,000 km or within 2 months. Refer to the vehicle’s warranty manual for model-specific schedules.
During the running-in period (first 5,000 km), avoid overloading and high-speed operation to protect engine components. Regular checks should include:
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Engine oil and coolant levels
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Brake system and tire condition
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Bolts and air pipes
After initial use, tighten all bolts to ensure vehicle safety. Proper engine care ensures long-term reliability and reduces the risk of unexpected breakdowns.
Vacuum Pump Operation and Maintenance
The water-circulating Vacuum pump is powered via the PTO (Power Take-Off) switch located under the dashboard. Key points include:
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Always press the clutch before engaging or disengaging the PTO
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Ensure the PTO switch is off before driving
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In winter, drain water tanks and pumps after parking to prevent freezing
Suction System Monitoring
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Normal vacuum pressure: 4–5 units
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Pressure above 7 units indicates a blockage—stop the engine immediately
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Regularly inspect inlet pipelines, elbows, and sludge deposits
Preventing Overfill and Pump Damage
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Monitor the tank observation window during suction
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Stop suction if wastewater approaches the tank top
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Clean filter screens if wastewater enters the pump
Regular Pump Checks
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Inspect belt tension pulley and adjust if loose
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If suction decreases, check:
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Water Tank level
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Float ball of the anti-overflow valve
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Pump inlet check valve
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Vacuum and water circulation system filters
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Tank inlet and bottom outlet
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Following these steps ensures safe, efficient, and long-lasting operation of sewage suction and cleaning vehicles.
