For transport trucks, the real test begins after the storm passes. Driving through deep water, exposure to muddy conditions, and heavy-load operations can leave behind hidden mechanical issues. Before returning to the road, it is crucial to perform a comprehensive, in-depth inspection of the truck to eliminate the risk of a breakdown mid-journey.
-
Fluid Check | Don’t Let the Vehicle Work with Hidden Defects
During heavy rain, transmission vents and drive axle breathers can easily ingest moisture. Before heading out again, pull out the engine oil and gear oil dipsticks to carefully check for signs of emulsification (turning white/milky) or foaming.
If emulsification is detected, the fluid must be completely drained and replaced with fresh fluid, and the corresponding filter elements should be changed simultaneously. Emulsification leads to a direct loss of lubrication; if left unaddressed, it can severely damage internal engine and transmission components.
-
Urea System | Clear the Vehicle’s “Detox Pathway”
In heavy rain, if the seal on the urea tank filler neck fails, rainwater can seep inside. Once rainwater mixes in, the urea solution’s concentration drops and its quality deteriorates. As the weather warms, this often leads to crystallization and clogging, triggering speed and torque limitations that directly disrupt normal operations.
Post-storm procedure: Drain the old urea solution, clean the tank, and refill it with high-purity urea solution that meets national standards to ensure the after-treatment system functions correctly.
-
Electrical Protection | Prevent “System Malfunctions”
Moisture ingress at ECU interfaces and sensor connectors is a common source of post-rain malfunctions. Dampness can cause anything from abnormal signals to intermittent engine stalling while driving, posing a serious safety risk.
Inspection steps: Disconnect the protective covers on connectors one by one. If standing water is found, use compressed air to blow away moisture, apply contact protectant, and properly seal the connections to prevent unexpected stalling or breakdowns on the road.
-
Clearing Debris for Cooling | Shedding the “Overheating Burden”
In muddy conditions following heavy rain, radiators and intercoolers can easily become clogged with mud, silt, and fallen leaves. This impairs cooling efficiency and causes engine coolant temperatures to spike, potentially leading to the engine “boiling over” when climbing slopes under heavy loads.
When cleaning the radiator and intercooler, do not use a high-pressure water jet directly on the components. Additionally, clear away any mud and debris accumulated in the crevices of the chassis to restore the powertrain’s optimal cooling performance.
Before returning to service after driving through water or rain, ensure the vehicle undergoes a thorough inspection. Proper post-rain maintenance not only safeguards transport efficiency but also serves as a solemn commitment to driving safety.
