Pilot Pump K7V125 For Various Excavators

The K7V125 is a pilot pump used in various excavators,  Here's a breakdown of its role in excavators.

Pilot Pump Function:In excavators, the K7V125 functions similarly to other K7V series pumps commonly used for pilot duty.

Pilot pumps provide two key benefits:

(1)Energy Efficiency: During low-flow situations, like when the excavator isn't performing heavy work, the K7V125 allows the main hydraulic pumps to shut down, saving fuel.

(2)Pilot Control: The K7V125 supplies hydraulic 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.).

Compatibility:

K7V125 is compatible with various excavator models, including the Hitachi ZAX70-5G 、Kobelco SK200-10.

Other models: There are likely other excavators that use the K7V125 as well.

Design Considerations:

While details about the specific design of the K7V125 might be difficult to find publicly, based on its prevalence alongside other excavator pilot pumps (which are typically gear pumps) and its advertised use for applications requiring moderate flow and pressure, the K7V125 is likely a gear pump.

Gear pumps are preferred for pilot applications due to their:

(1)Low Cost: Gear pumps are a relatively inexpensive design.

(2)Reliability: They have a simple design with few moving parts, making them dependable.

(3)Low Pressure, High Volume: Gear pumps excel at delivering a consistent flow of fluid at moderate pressures, perfect for pilot pump applications.

Applications Beyond Excavators:

The K7V125 could potentially be used as a hydraulic pump in other industrial machinery requiring moderate flow and pressure.

To definitively confirm the function of the K7V125 in a specific excavator model:

(1)Check the pump itself for a part number.  typically includes application information in their part numbers.

(2)Consult the user manual or parts catalog for your specific excavator model.

(3)Contact a Hebei Keluo Construction Machinery hydraulics specialist for further assistance.