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Common Excavator Air Conditioning Failures and Repairs

나는 폴에게서 도움을 평가합니다, 그는 prefessional이고 무슨 부속을 나가 필요로 하는 정확하게 알고 있습니다. 나의 CAT는 아무 문제 없이 일하기 위하여 돌아갔습니다.

—— Raphael

마지막 드라이브를 얻고 그것의 아름다운 나는 생각합니다. 우리는, 나의 기계 지금 다시 일하기 위하여 갑니다 그것을 히타치 우리의 ZX330 굴착기에서 조립해 달라고 하는 것을 가지고 있습니다. 많은 감사

—— Kevin

빠른 배송, 도착한 부품의 품질이 우수하고 엔진이 수리되어 최대 출력으로 완벽하게 작동합니다. 감사합니다, 신의 축복이 있기를.

—— Mohammed

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Common Excavator Air Conditioning Failures and Repairs

The air conditioning system of an excavator works on a similar principle to that of an automobile, consisting of a compressor, condenser, evaporator, expansion valve/capillary tube, blower, pipelines, and control circuits. Due to dusty environments, strong vibrations, and poor heat dissipation conditions, air conditioning failures are quite common in excavators. Below is a summary of common failures and repair methods:


1. Poor Cooling or No Cooling

  • Possible Causes

    • Insufficient or leaking refrigerant (Freon)

    • Compressor damaged or low efficiency

    • Poor condenser heat dissipation (dust buildup, fan failure)

    • Evaporator icing or blockage

    • Expansion valve malfunction

  • Repair Methods

    • Check with pressure gauges; recharge refrigerant if low

    • Inspect pipelines, joints, condenser for leaks → repair, vacuum, and recharge

    • Clean condenser and evaporator dust buildup

    • Replace faulty compressor or valve components


2. Weak or Low Airflow

  • Possible Causes

    • Blower motor failure

    • Air ducts blocked by dust, leaves, or debris

    • Cabin air filter clogged

  • Repair Methods

    • Inspect blower motor, repair or replace

    • Clean air ducts and evaporator fins

    • Replace cabin air filter


3. Abnormal Noise

  • Possible Causes

    • Compressor internal damage (seizure, bearing wear)

    • Blower wheel imbalance or foreign objects

    • Vibration from loose pipelines

  • Repair Methods

    • Inspect compressor, replace if necessary

    • Remove debris, repair blower

    • Secure pipelines and brackets


4. Frost on Pipelines but No Cooling

  • Possible Causes

    • Expansion valve improper opening or blockage

    • Excessive or insufficient refrigerant

    • Insufficient evaporator airflow

  • Repair Methods

    • Inspect and adjust expansion valve

    • Refill refrigerant to specified amount

    • Clean air ducts and filters


5. AC Not Operating (Completely Shut Down)

  • Possible Causes

    • Blown fuse

    • Control panel/switch malfunction

    • Compressor electromagnetic clutch failure

    • Pressure switch protection (high or low pressure abnormal)

  • Repair Methods

    • Check electrical system → replace fuse, repair wiring

    • Test control panel and switches → replace faulty components

    • Inspect clutch coil and power supply

    • Measure system pressure → troubleshoot leaks or blockages


Maintenance and Prevention

  1. Regularly clean condenser and evaporator (recommended every 500+ hours of operation).

  2. Check and replace cabin air filter to ensure airflow.

  3. Regularly monitor refrigerant pressure, recharge when insufficient.

  4. Avoid running AC for long periods at idle speed to reduce compressor load.

  5. Check system sealing every spring, prevent refrigerant leakage.

선술집 시간 : 2023-05-11 16:34:37 >> 뉴스 명부
연락처 세부 사항
Guangzhou Anto Machinery Parts Co.,Ltd.

담당자: Mr. Paul

전화 번호: 0086-15920526889

팩스: +86-20-89855265

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