Winter maintenance of slurry seal trucks is crucial for extending equipment life and ensuring efficient construction the following year. The following guidance covers common maintenance points, focusing on the engine, working system, hydraulic system, electrical system, and special winter precautions.
1. Engine and Chassis Maintenance
* Engine Oil Selection: Use low-viscosity engine oil (such as SAE 5W-30) in winter to ensure fluidity at low temperatures and reduce cold-start wear.
* Fuel Management: Add diesel anti-gelling agent to prevent fuel lines from freezing (according to data from Heilongjiang Province, fuel freezing is one of the common causes of failure in winter).
* Chassis Inspection: Regularly check drive shaft bolts and the suspension system, tightening any loose parts to prevent them from falling off during driving.
2. Working System Maintenance
* Asphalt Tank Cleaning: After each operation, flush the inner wall of the tank with hot water to prevent asphalt residue from oxidizing and clumping (failure to clean promptly may lead to pump blockage, resulting in high repair costs).
* Spreading Device Calibration: Adjust the scraper speed and height to ensure even spreading of the aggregate (a deviation exceeding 5% requires readjustment). Nozzle Inspection: Clean the asphalt spraying nozzles weekly to prevent clogging and uneven spraying (e.g., a construction team had to rework due to nozzle blockage).

3. Hydraulic System Antifreeze Measures
Fluid Change: Use No. 32 low-pour-point hydraulic oil in winter (No. 46 oil in summer), change the oil twice a year, and clean the oil tank before changing the oil.
Pipeline Antifreeze: After operation, let the engine idle for 10 minutes to warm up the hydraulic oil, then drain the residual oil from the pipeline; an electric heating device can be installed (actual tests show it can reduce the failure rate by 60%).
Seal Inspection: Inspect the seals quarterly, replace damaged ones promptly to prevent leaks and road contamination.
4. Electrical System Protection
Wiring Inspection: Wipe the wiring in the distribution box with a dry cloth monthly, and wrap aging joints with insulating tape (humid environments can easily cause short circuits).
Sensor Calibration: Calibrate the pressure and temperature sensors every six months to ensure accurate parameter display (adjustments are required if the deviation exceeds ±0.5℃). Battery Maintenance: In low temperatures (below -15℃), check the battery level daily. Charge it promptly if it falls below 50% to prevent starting failure.
5. Winter Parking and Regional Adaptation
Empty Residue: After shutdown, empty the asphalt tank and water tank. Install a drain valve at the lowest point of the hydraulic lines to prevent freezing and cracking.
Extreme Weather Response: In environments below -25℃, shorten operating time. When the engine is running, the insulation jacket can be activated (to improve starting success rate).
Supplementary Recommendations
Regular Inspections: Even when the equipment is not in use, a basic inspection (such as fasteners and fluid levels) should be performed monthly to avoid problems caused by prolonged inactivity.
Professional Service: For complex malfunctions (such as hydraulic system abnormalities), it is recommended to contact after-sales service engineers for in-depth maintenance.
By implementing the above measures, the winter failure rate can be significantly reduced, preparing for construction in the following year. Maintenance should be adjusted flexibly according to the local climate; for example, in high-altitude and cold regions, more attention should be paid to antifreeze treatment