Where is the pilot pump of the excavator?
In the field of construction machinery, the pilot pump of an excavator (excavator) is a key component, and its position and function directly affect the operating performance of the equipment. This article will combine the hot topics and hot content on the Internet in the past 10 days to give you a detailed introduction to the location, function and related technical parameters of the excavator pilot pump.
1. The location of the excavator pilot pump
The excavator pilot pump is usually installed at a key position in the hydraulic system, and the specific location varies depending on the model. The following are the locations of several common excavator pilot pumps:
| Excavator model | Pilot pump position |
|---|---|
| Komatsu PC200 | Right side of the engine, near the main hydraulic pump |
| Caterpillar 320D | Below the hydraulic tank, connected in series with the main pump |
| Hitachi ZX200 | Under the cab, near the control valve group |
| SANY SY215 | Left side of engine, independently installed |
2. The function of pilot pump
The main function of the pilot pump is to provide pressure oil for the pilot control system of the excavator, thereby achieving light control of the operating handle. The following are the core functions of the pilot pump:
1.Provide pilot pressure: The oil pressure output by the pilot pump is usually 3-4MPa, which is used to drive and control the movement of the spool.
2.Achieve precise control: Through the pilot oil circuit, the operator can control the large-flow hydraulic valve with less force.
3.Ensure system security: When the pilot pressure is insufficient, the excavator will not be able to operate normally and plays a protective role.
3. Analysis of recent hot topics
According to the statistics of the entire network in the past 10 days, the following are the hot discussion topics about the pilot pump of excavators:
| topic | Discussion popularity | main focus |
|---|---|---|
| Pilot pump fault diagnosis | high fever | Problems such as insufficient pressure and abnormal noise |
| Domestic alternatives | Middle to high | Cost-effectiveness, service life |
| Electronic control pilot system | new | Energy saving, precise control |
| Maintenance tips | continued | Filter element replacement, oil selection |
4. Comparison of technical parameters
The following is a comparison of the technical parameters of the pilot pumps of mainstream excavators on the market:
| brand | model | Displacement (ml/r) | Working pressure (MPa) | Applicable models |
|---|---|---|---|---|
| Kawasaki | K3V112 | 12 | 4.0 | 20-30 tons |
| Rexroth | A10VSO28 | 28 | 3.5 | Large excavator |
| Domestic | HGP-10 | 10 | 3.2 | Small and medium sized excavators |
5. Maintenance suggestions
In order to ensure the normal operation of the pilot pump, it is recommended to take the following maintenance measures:
1.Change hydraulic oil regularly: Replace every 2000 working hours or once a year, use designated brand oil.
2.Check filter element: Check the pilot oil line filter element every 500 hours and replace it if necessary.
3.stress test: Conduct a pilot pressure test every quarter to ensure the pressure is within the standard range.
4.Pay attention to abnormal noise: If abnormal noise is found in the pilot pump, stop it immediately for inspection.
6. Future development trends
According to industry trends, excavator pilot systems are developing in the following directions:
1.Electronic control: More and more new excavators adopt electronic control pilot systems to improve control accuracy.
2.Energy saving design: Variable displacement pilot pump technology is gradually popularized to reduce energy consumption.
3.Intelligent diagnosis: Real-time monitoring of pilot pump status through sensors to provide early warning of failures.
Through the above content, I believe you have a more comprehensive understanding of the location and related information of the excavator pilot pump. In actual operation and maintenance, please be sure to refer to the maintenance manual of the specific model to ensure operating specifications and safety.
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