Road wrecker trucks, also known as wreckers, tow trucks, or road rescue vehicles, play a crucial role in road safety and emergency response. They are used for lifting, pulling, towing vehicles involved in accidents, malfunctioning vehicles, and illegally parked vehicles, and they also participate in emergency rescues. Like any vehicle, wrecker trucks can experience faults. Understanding these common issues and their solutions can help keep these vehicles in optimal working condition.
1. Vibration in the Extension of the Wrecker Truck’s Boom
Cause: This issue is often due to problems with the boom’s slider, such as insufficient lubrication, deformation, or surface damage.
Solution: Apply grease to improve lubrication, replace the deformed slider, or grind the surface to fix any damage.
2. Inability to Compensate for the Extension Length of Each Boom Section
Cause: Possible causes include a malfunctioning solenoid valve, electrical faults, or a clogged oil filter.
Solution: Replace the solenoid valve, repair any wiring issues, or clean the oil filter.
3. Intermittent Movement of the Wrecker Truck’s Lifting Mechanism
Cause: This can be due to issues with the check valve.
Solution: Clean or replace the check valve to resolve the issue.
4. Inability to Release the Brake of the Wrecker Truck’s Lifting Mechanism
Cause: This could be due to a jammed shuttle valve, internal leakage within the shuttle valve, or poor sealing of the brake piston.
Solution: Disassemble the mechanism, inspect for damage, and replace any faulty seals.
5. Automatic Extension and Retraction of the Wrecker Truck’s Cylinder
Cause: This issue may be caused by a malfunction in the cylinder or a faulty balance valve.
Solution: Inspect, clean, and replace any damaged components as necessary.
6. Hydraulic Oil Leakage in the Wrecker Truck
Cause: Leaks are often due to damaged seals or faulty pipe connections.
Solution: Inspect seals and pipe connections, replace any damaged seals, and tighten or replace fittings and pipes as needed.
7. Wrecker Truck Exceeding Lifting Height Limit Without Alarm Sounding
Cause: This is usually due to a damaged bell or an overwinding relay.
Solution: Conduct an immediate inspection and repair any issues with the bell or relay.
8. Excessive Pressure in the Wrecker Truck’s Return Oil Circuit
Cause: A clogged oil filter is typically the cause of this issue.
Solution: Replace the clogged filter element to resolve the problem.
9. Slow and Weak Extension of the Wrecker Truck’s Boom
Cause: This issue is often due to a fault in the hydraulic system, or a malfunction in the extension mechanism control valve or relief valve.
Solution: Inspect and adjust the extension mechanism. If the problem persists, disassemble, clean, and replace any damaged components.
Understanding and addressing these common faults can help maintain the functionality and reliability of road wrecker trucks, ensuring they are ready to perform critical tasks when needed.
