Used CAT 140G graders, as heavy machinery widely used in road construction and land leveling, may experience some common faults during use despite their powerful performance. Understanding these faults and their solutions can not only help improve equipment efficiency but also reduce maintenance costs and extend service life. This article will discuss several common faults and their corresponding solutions.

Difficulty Starting the Engine

Symptom: When attempting to start the CAT 140G grader, the engine does not respond or is difficult to start.

Solution:
First, check if the battery has sufficient power and ensure a good battery connection. Replace the battery if necessary.

Check the fuel system to ensure sufficient fuel and that it is free of impurities. If the fuel filter is clogged, replace it promptly.

Check the ignition system, including spark plugs and ignition coils, and replace or repair them if necessary.

Hydraulic System Leakage

Symptom: During operation, hydraulic system leaks, leading to insufficient power and unstable operation.

Solutions:

Inspect the hydraulic oil tank and confirm the oil level is within the normal range. If the oil level is insufficient, add the appropriate type of hydraulic oil promptly.

Regularly inspect the hydraulic lines, joints, and cylinders. Replace seals or repair damaged parts immediately if leaks are found.

Ensure the hydraulic pump is operating normally. If abnormal noise or vibration occurs, professional repair is required.

Uneven Blade Wear

Symptom: The grader blades experience uneven wear during use, affecting the leveling effect.

Solution: Regularly check the blade wear and adjust or replace them as needed.

Ensure the blade installation angle is correct to avoid uneven wear caused by improper angles.

Adjust the blade working depth appropriately when leveling different soil types to achieve the best leveling effect.

Operation Control Malfunction

Symptom: The grader’s operation control system malfunctions, making normal operation impossible.

Solution: Inspect the control system circuitry, including switches, relays, and wiring, ensuring there are no open circuits or short circuits.

If the control lever is slow to respond or malfunctions, it may be due to wear or jamming of internal mechanical parts, requiring disassembly, cleaning, and lubrication.

Regularly maintain and inspect the control system to ensure its sensitivity and reliability.

Rapid Tire Wear

Symptom: The grader’s tires wear out severely in a short period, affecting operational stability.

Solution: Regularly check tire pressure and maintain it within the manufacturer’s recommended range. Insufficient tire pressure will accelerate tire wear.

Inspect the grader’s suspension system to ensure it is functioning properly and avoid uneven tire load caused by improper suspension.

Select appropriate tire types for different terrains to reduce wear rate.

Understanding common faults and solutions for second hand CAT 140G graders can help operators identify and handle problems promptly during daily use, ensuring efficient equipment operation. Regular maintenance and inspection are key to preventing faults. Users are advised to develop a detailed maintenance plan to ensure the equipment is always in good condition. Seeking assistance from professional technicians in the event of complex faults is also an important measure to ensure safe and reliable equipment operation. These methods can effectively improve the working efficiency of the CAT 140G grader and extend its service life.