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The N-AP2D21 is pilot pump used in various excavators based on the available information.
Model Breakdown：
N-AP2D21 Similar to other N-AP2D pumps (N-AP2D25, N-AP2D28), this prefix indicates a specific manufacturer or series, but without more details, it's difficult to pinpoint the exact origin. The core model designation is likely AP2D21.
Function:Based on its name containing AP2D21 and its association with excavators, the N-AP2D21 is likely a gear pump used for pilot duty due to several factors
Gear Pump:Design Pilot pumps in excavators are commonly gear pumps. They are preferred because of
Cost-Effectiveness Gear pumps have a simpler design, making them affordable.
Reliability:Their simple design with few moving parts translates to dependable operation.
Moderate Flow & Pressure:They excel at delivering a consistent flow of fluid at moderate pressures, ideal for pilot pump requirements.
Pilot Pump:Role Pilot pumps provide low-pressure, high-volume hydraulic fluid for two key excavator functions.
Fuel Efficiency:During low-flow situations, the pilot pump allows the main hydraulic pumps to shut down, conserving fuel.
Control System Operation:The pilot pump supplies fluid to the excavator's control system. This system uses pressure and flow to move the spools in the main hydraulic control valve. These spools then direct the high-pressure flow from the main pumps to the excavator's actuators (arm, bucket, tracks, etc.).
Market Positioning:Listings for the N-AP2D21 are often placed with other excavator pilot pumps and parts, further suggesting it functions as a pilot pump itself.
Compatibility:While specific models are difficult to confirm without manufacturer details (N-), online listings suggest compatibility with excavators from:
Komatsu (possibly the PC45 or SK30 models)
Other brands (there are likely other excavators that use the N-AP2D21)
Confirming the N-AP2D21 Function in Your Excavator
Check the Pump:Look for a part number on the pump itself. Manufacturers often encode application information within part numbers. This can help identify the specific manufacturer (N-) and potentially the intended use (pilot pump).
Consult the Manual Refer to the user manual or parts catalog for your specific excavator model. It should specify the function (pilot pump) and location of the N-AP2D21 pump.
Contact a Specialist hydraulics specialist Hebei Keluo Construction Machinery Co., Ltd. They can provide detailed information based on the specific model and pump in question.
Key Points to Remember:
The N-AP2D21 is pilot pump due to its design and association with excavators.
It's unlikely to be the main hydraulic pump due to its focus on moderate flow and pressure.
Refer to your excavator's manual or consult a specialist for definitive confirmation.
Mechanical power expert Hebei Keluo Construction Machinery is willing to provide you with all-round technical support, serve the people of the world with high-quality products, and provide perfect services to win praise from all customers.
