Vehicle Maintenance Guide After Flood: What to Do If Your Truck Is Submerged?
Heavy rainfall and floods have recently hit many regions, and many truck owners' vehicles were submerged due to sudden rising water. After the water recedes, how should you properly inspect and maintain your vehicle to avoid further damage?
Drive Axle: Check Fluid, Prevent Water Ingression
The drive axle is located low and is often the first to be submerged. Its housing has breather holes or gaps where water can enter. After the water drains, be sure to check whether the gear oil has emulsified (milky white). If so, replace it immediately to avoid wear or damage to the ring and pinion gears.
Brake Drum: Clean Out Sand and Mud in Time
If the brake drum was submerged, sand and mud can accumulate inside. Before driving again, rinse it thoroughly with water to prevent accelerated wear of the braking system or reduced braking efficiency.
Wheel End: Carefully Check Seals and Lubrication
Water entering the wheel end is often overlooked. After flooding, open the hub cap and check whether the seal is intact and whether the grease inside has emulsified. Replace the seal if necessary and reapply lubricant.
Drivetrain: Attention to U-Joints and Grease Fittings
If the U-joints or grease fittings on the drive shaft were underwater, squeeze out the old grease and reapply new grease to prevent rust and malfunction (skip this step if equipped with maintenance-free driveline).
Air Suspension: Clean and Reset the System
If the vehicle is equipped with air suspension, clean the exterior of the air bags and shock absorbers. Use professional equipment to check the inflation height and system status. If height is inconsistent or the system does not inflate, seek repair or recalibration.
Transmission: Do NOT Start, Seek Professional Repair
If the transmission has been flooded, do NOT attempt to start or drive. Contact a tow truck and send it for professional repair. Water ingress can cause valve body and electronic control failure, as well as fluid deterioration, which may lead to severe transmission damage.
What details do we check?
First, it is essential to drain and replace all engine fluids, including oil and coolant, along with their corresponding filters. This ensures that the lubrication and cooling systems are free of water contamination and can function properly.
Next, inspect all exposed bearing components such as the fan, belt tensioner, and idler pulleys. If these parts have been submerged, they should be replaced to prevent premature failure. This helps maintain proper operation of the cooling fan and belt drive system, avoiding overheating or accessory failure.
After addressing mechanical components, a thorough inspection of the vehicle's electrical system is critical. Check all wiring harnesses, connectors, and electronic control units for signs of corrosion or water damage. Replace any damaged parts promptly to prevent electrical malfunctions, communication errors between systems, and potential safety hazards.
Additionally, the air brake system requires special attention. Remove all moisture from air lines and components such as quick-release valves, hand control valves, and brake chambers. Inspect the air dryer cartridge for water saturation and replace it if necessary. Use compressed air to blow out any remaining moisture from the entire air system. This step is vital to prevent water from entering the brake mechanisms, which could lead to brake failure.
·Replace engine oil and filters;
·Check components with bearings such as fans and tensioners;
·Inspect electrical connectors and wiring for corrosion;
·Remove moisture from the air system, especially quick-release valves, handshake valves, and the air dryer. Use compressed air to blow dry the air ·lines to prevent brake failure.
Final Reminder:
Whether your vehicle was submerged or not, it is recommended to check the fuel and urea tanks for water ingress after heavy rain to avoid stalling or damage.
A thorough and detailed inspection is essential to ensure your vehicle continues to operate safely and reliably after the disaster.
