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Home » News » FAQ

Buying Used Construction Machinery Guide

This page provides practical answers and experience-based guidance for buying used construction machinery, including excavator condition checks, pricing considerations, export process, and common questions from overseas buyers.

FAQ Category

FAQ

  • Q How to handle overheating of the cooling system of a used excavator?

    A
    Immediately stop the machine and idle to cool down, check the coolant level and whether the radiator is blocked, add coolant or clean the radiator dust, and check the water pump for faults.

  • Q How to maintain the fuel system of a used excavator?

    A
    Regularly replace the fuel filter, use qualified diesel, clean impurities in the fuel tank, avoid blockage of fuel pipelines, and prevent damage to the fuel injector.

  • Q What to do if there is abnormal noise in the slewing mechanism of a used excavator?

    A
    Stop operation, check the slewing bearing clearance and lubrication. If the clearance is too large or lack of lubrication, add grease or overhaul the slewing bearing.

  • Q What are the manifestations of electrical system failures in used excavators?

    A
    Manifestations include instrument panel fault codes, non-lighting lights, difficulty in starting, and air conditioning failure, mostly due to loose wiring harness, sensor failure or battery aging.

  • Q What are the common problems with the braking system of used excavators?

    A
    Common problems: Brake failure, brake abnormal noise, brake disc wear, mostly caused by insufficient brake oil and aging brake pads, which need regular inspection and replacement.

  • Q Are parts for used excavators easy to buy?

    A
    Parts for mainstream brands (Komatsu, Caterpillar, Sany) are easy to buy, while parts for niche brands or old models are hard to find. It is necessary to confirm the supply of parts in advance when purchasing.

  • Q Which components are usually covered by the warranty of a used excavator?

    A
    The warranty from regular dealers mainly covers core components such as engine, hydraulic pump, travel motor and slewing mechanism, and vulnerable parts are not covered.

  • Q What problems will occur if a used excavator is idle for a long time?

    A
    Battery loss, hydraulic oil deterioration, rust of metal components, and aging of rubber components will occur. Anti-rust and oil drain maintenance should be done before idling.

  • Q Does severe bucket wear of a used excavator affect operation?

    A
    Yes. Severe bucket wear will reduce excavation efficiency and cause serious soil leakage. It is necessary to replace the bucket teeth or weld the bucket, and directly replace the bucket if it is severe.

  • Q How to solve the traveling deviation of a used excavator?

    A
    First check the tightness of the track, then check the travel motor, reducer and hydraulic pipeline. It is most likely a single motor failure or uneven hydraulic pressure.

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