Expert Knowledge Base

Key Component Glossary (EN / RU)

• **Turbocharger (增压器):** Increases engine power by forcing extra air into the combustion chamber. Installed in the exhaust system. Example: Caterpillar 345D (卡特彼勒 345D) Turbocharger (Турбокомпрессор для Caterpillar 345D).
• **Solenoid Valve (电磁阀):** Controls the flow of fluids or gases. Used in hydraulic or pneumatic circuits. Example: Komatsu WA380-3 Solenoid Valve (Электромагнитный клапан для Komatsu WA380-3).
• **Thermostat (节温器):** Regulates the coolant flow to maintain optimal engine temperature. Located between the engine and radiator. Example: Yanmar 3TN75E Thermostat (Термостат для Yanmar 3TN75E).
• **Alternator (发电机):** Converts mechanical energy into electrical energy to charge the battery. Attached to the engine. Example: Komatsu 6D105 Alternator (Генератор для Komatsu 6D105).
• **Pressure Sensor (压力传感器):** Measures pressure in hydraulic lines, engine oil, or fuel rails. Found on various systems. Example: Komatsu WA470-6 Hydraulic Pressure Sensor (Датчик давления для Komatsu WA470-6).
• **Fuel Pump (输油泵):** Delivers fuel from the tank to the injection system. Located on the fuel line or engine. Example: Yanmar 3TNV88 Fuel Pump (Топливный насос для Yanmar 3TNV88).
• **Cylinder Head Gasket (汽缸垫):** Seals the combustion chamber, cooling passages, and oil passages between the cylinder head and engine block. Example: Yanmar 4TNE98 Cylinder Head Gasket (Прокладка головки блока цилиндров для Yanmar 4TNE98).
• **Water Pump (水泵):** Circulates coolant through the engine's cooling system. Mounted on the engine block. Example: Komatsu WA380-6 Water Pump (Водяной насос для Komatsu WA380-6).
• **Angle Sensor / Potentiometer (角度传感器/电位计):** Measures the angular position of a part, often for throttle or bucket position. Example: Komatsu WA200 Angle Sensor (Датчик угла для Komatsu WA200).
• **Relay (继电器):** An electrical switch that uses a small current to control a larger current. Used in various electrical circuits. Example: XCMG XE60 Relay (Реле для XCMG XE60).

Maintenance Tips & Troubleshooting

1. **How to identify a failing hydraulic pump in a Komatsu excavator?** Look for slow or weak movement, excessive noise (whining or banging), increased hydraulic oil temperature, and contaminated oil (metal particles).
2. **What are common signs of a bad thermostat in a diesel engine?** The engine either runs too cold (never reaches operating temp) or overheats (temp spikes) due to the thermostat being stuck open or closed.
3. **Why is it important to use quality air filters?** A high-quality air filter (like **Komatsu Air Filter 600-181-2461**) is crucial to prevent dust and debris from entering the engine, which can cause premature wear on piston rings, valves, and cylinder liners, leading to expensive repairs.

Troubleshooting: Komatsu PC200-7 Excavator Weak Travel Diagnosis (小松PC200-7挖掘机行走无力故障诊断与解决方案)

If your Komatsu PC200-7 excavator experiences weak travel, follow these steps:

1. Check Pilot Pressure: Ensure the pilot pressure is within specification. Low pilot pressure (controlled by the **Pressure Sensor 421-43-22922** or similar) can prevent the main control valve from fully stroking.

2. Verify Main Relief Pressure: Check the pressure setting for the main pump. If the main relief valve is stuck open or set too low, the machine will lack power.

3. Inspect the Swivel Joint: Leaks in the center swivel joint (often requiring a kit like the **Komatsu WA600-3 Lift Cylinder Seal Kit**) can cause pressure loss between the main control valve and the travel motors.

4. Test Travel Motor Efficiency: If all pressures are correct, the issue may be internal leakage within the travel motor (e.g., failed seals or worn-out piston shoe). A differential test can confirm this.

Growshine's Services and Commitment

At **Growshine International**, we are not just a supplier; we are your project partner. We offer specialized services including:

• **Customized Parts Development:** We support customization and development of non-standard parts to fit your unique machinery needs.
• **Global Sourcing:** Extensive network for hard-to-find Komatsu WA470-6 A/C filter replacement and Yanmar 4TNV84 crankshaft thrust washer.
• **Quality Assurance:** Every part, from **Small Excavator Kubota D1005 Fuel Pump** to **Rollers Deutz BF4M2012 Turbocharger 04258205KZ**, undergoes strict quality control.

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