Common Problems with Used Concrete Pump Trucks and How to Fix Them

In construction projects, concrete pump trucks are key equipment for efficient concrete pouring. Whether it is a large-scale high-rise project or a municipal road project, pump trucks can greatly improve construction efficiency. For contractors with limited budgets or short-term projects, used pump trucks have become a very cost-effective choice. However, when purchasing used concrete pump trucks, users also need to pay attention to potential problems and corresponding maintenance plans to ensure smooth construction.

What is a pump truck?

A pump truck is an engineering machine that integrates a concrete delivery pump and a distributing arm. According to its use and structure, it can be divided into ground pumps, vehicle-mounted pumps, trailer pumps, and concrete pump trucks. We mainly provide vehicle-mounted concrete pump trucks, which install concrete delivery pumps on the truck chassis, drive them through a hydraulic system, and combine them with flexible distributing arms to achieve accurate and efficient concrete delivery. It is the mainstream equipment in current engineering construction.

How does a concrete pump truck work?

The working process of a standard concrete pump truck is as follows: the mixed concrete enters the pumping system from the hopper, and the piston is driven to reciprocate through the hydraulic system to continuously push the concrete into the conveying pipe. Finally, the concrete is accurately conveyed to the specific location required for construction by the distributing arm. The core lies in the organic coordination of the high-pressure conveying system and the retractable arm, which enables both construction efficiency and pouring accuracy to be taken into account.

Problems and solutions that may be encountered with second-hand concrete pump trucks? 

When purchasing a used concrete pump truck, common problems include hydraulic system leakage, conveying cylinder wear, distributing arm deformation, and electronic control system failure. The key to solving these problems lies in comprehensive inspection and standardized maintenance. The following are common faults and their corresponding causes and solutions:

1. Hydraulic system leakage

Cause:

Aging of the cylinder seal

• Loose and worn hydraulic hose or joint.
• Damage or unstable pressure of the hydraulic oil tank.

Solution:

• Regularly check all hydraulic components for leakage.
• Replace aged seals and damaged joints, and hoses.
• Replace hydraulic oil every certain period of work to keep the oil clean and the system running smoothly.

2. Severe wear of conveying system components

Cause:

• Long-term operation causes surface wear of key components such as S valves, eyeglass plates, and cutting rings.
• Increased gap between components, concrete backflow, or blockage.

Solution:

• Check whether it is original accessories and evaluate the wear status of wear-resistant parts.
• Replace wear parts in time before putting them into use to ensure continuous and efficient pumping.

3. Fabric arm structure failure

Cause:

• High-frequency telescopic and overloaded operations cause cracks, bending, or weld fractures in the fabric arm.
• Lack of lubrication or rust on the rotating bearing.

Solution:

• Use ultrasonic or magnetic particle flaw detection equipment to check key parts of the fabric arm.
• Repair or replace the arm with safety hazards.
• Regularly lubricate bearings and joint components to ensure flexible and smooth movement.

4. The electronic control system is unstable.

Cause:

• Aging and damage of the solenoid valve, circuit or controller chip.
• Water inflow or signal feedback failure of the control circuit.

Solution:

• A professional technician will comprehensively check the status of the components of the electronic control system.
• Replace the damaged solenoid valve or control board, and rewire to ensure the stability of the circuit.
• Back up the system parameters to prevent the settings from being lost.

5. The pumping pipeline is blocked or corroded

Reason:

• The pipeline has not been cleaned for a long time, and the concrete residue has hardened and scaled.
• The use of inferior lubricants or improper concrete ratios causes blockage.
• The inner wall of the delivery pipe is severely corroded and worn seriously.

Solution:

• Cleaning the pumping pipeline in time after each operation to prevent residual dryness.
• Use high-quality lubricants and cleaning agents to maintain the pipeline regularly.
• Replace the severely damaged pump pipe in time to avoid bursting during operation.

When purchasing a concrete pump truck, it is recommended to choose a supplier with professional testing and preparation processes, and focus on checking the equipment maintenance records and actual operation. This will not only improve the cost-effectiveness of the equipment, but also help reduce the failure rate and maintenance costs in the later stage. Purchasing reliable concrete pump truck for sale products can more effectively ensure construction efficiency and safety.

What is the price of concrete pump trucks?

The price of concrete pump trucks for sale is affected by multiple factors such as brand, arm length, service life, and maintenance. Due to the technical update and quality assurance, the price of new pump trucks is relatively high, which is suitable for construction units with long-term and frequent use. On the other hand, used pump trucks have completed the previous depreciation, and the purchase cost is low, making them an ideal choice for small and medium-sized enterprises or temporary projects. Although the specific price will vary due to market fluctuations, in general, the investment cost of used pump trucks is usually much lower than that of new machines.

Summary

Purchasing a concrete pump truck is a crucial step in the project. Understanding its classification and working principle will help to make a more scientific equipment selection; mastering the common problems and corresponding solutions of used concrete pump trucks can effectively avoid construction risks. For customers who pursue cost-effectiveness, high-quality second-hand pump trucks are undoubtedly an economical and practical choice. Doing more research before purchasing and choosing a reputable supplier will bring continuous protection and value to the project construction.

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