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In construction machinery repair, replacing rolling bearings is a frequent task. However, given today’s uneven quality in the spare parts market, the reliability of construction machinery is often questionable, and after repair, the quality can be even worse. This involves both part quality issues ... 続きを読む
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Originally, this was considered the most basic mechanical common sense, something even a vocational school teacher would dismiss. But in reality, bolt loosening is one of the most frequent repair issues in machinery. If ignored, it often leads to loss of fastening strength in machine parts, and in ... 続きを読む
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Many operators have started performing their own machinery maintenance, which is a positive trend. It shows that technicians are recognizing the value of technical work—because skilled maintenance is highly valuable. However, mastering maintenance is not something that can be learned in a few days. ... 続きを読む
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Insufficient machine power is a common but high-level fault in construction machinery. As a mechanic, this fault can be challenging to diagnose accurately on-site. The simplest cause is often fuel circuit blockage or clogged filters. However, accurate diagnosis under on-site conditions requires ... 続きを読む
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1. Display Screen Not Turning On / Black Screen Possible Causes Power supply or fuse failure Loose connectors or wiring issues Faulty display screen Remedies Check fuse and power voltage Inspect connectors and wiring → clean or reconnect Replace the display module 2. Display Screen Flickering or ... 続きを読む
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1. Fault Symptoms On-site, the operator reported that the boom sometimes moves fast and sometimes slow, showing random behavior. The issue is intermittent: sometimes the machine works a whole day without problem, while at other times it occurs four to five times within an hour. This fault affects ... 続きを読む
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The throttle control on Volvo excavators usually involves mechanical throttle, electronic throttle (ECU/e-throttle), pedal or knob, sensors, and linkage. Faults may cause unstable engine idle, slow response, or inability to accelerate. 1. Slow Throttle Response or Engine RPM Not Increasing Possible ... 続きを読む
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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 ... 続きを読む
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コマツ WA800-3 Hi-LIFT ホイールローダー 総合メンテナンスガイド このガイドは、コマツ WA800-3 Hi-LIFT ホイールローダーの適切な操作を確保し、定期的な詳細なメンテナンスを通じて耐用年数を延ばすことを目的としています。 I. 毎日のメンテナンス 清掃: 油汚れ、泥、および破片を取り除くために、ローダーを毎日清掃し、機器をきれいに保ちます。 清掃中に水や洗剤が電気系統や回路システムに入り、短絡やその他の誤動作を引き起こさないように注意してください。 潤滑: 潤滑チャートに従って、すべての可動部品と油圧システムの潤滑を行います。 適切な潤滑油とグリースを使用して、効果... 続きを読む
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カワサキは,水力技術の世界的リーダーであり,軸型ピストンポンプ中での使用オープン・ループと閉鎖・ループ下記シリーズは,異なる世代と型の川崎ポンプを表しています. 1.K3Vシリーズ ✅ 説明: についてK3Vシリーズこれは変位軸式ピストンポンプオープンループ回路用に設計されている. この装置はスワッシュプレートプレートの角度を変えることで流れを制御する設計です モデルとしては,K3V63,K3V112,K3V140,K3V180,K3V280.... 続きを読む
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