YN50V00020F1 Hydraulic Pump Pilot Filter 87338500 YN50V00022F4

Applications:

FIAT KOBELCO  E 235 B SR
KOBELCO  260 NLC-E10SK 130 LC-11SK 140 SRLC-7SK 210 LC-11 ESK 260 LC-11SK 260 NLC-11
NEW HOLLAND  E 235 B SRE 235 B SR-2

Professional YN50V00020F1 Hydraulic Pump Pilot Filter 87338500 YN50V00022F4

Q: What is a pilot filter?

Pilot filter is a precision filtering component specifically used for pilot control circuits in industrial fluid systems such as hydraulic and pneumatic systems. It is the first critical line of defense to ensure system control accuracy and core component safety.

• Core positioning: It belongs to the front-end pre filtering element of the system, dedicated to serving the pilot control oil circuit. By filtering small flow control fluids, it shares pressure and reduces impact for the subsequent main system filtration.
• Adaptation scenarios: Widely used in hydraulic systems such as excavators, construction machinery, and oil and gas equipment, it can also be extended to industrial scenarios such as water treatment and air treatment that require pre filtration.
• Structural features: High precision filter materials are usually used, with a small filtration area but high filtration accuracy. They can intercept small particles larger than 5 microns and meet the strict requirements of the pilot circuit for oil cleanliness.

Q: Why Pilot Filters Matter the hydraulic pump?

The pilot filter is the core component that ensures the long-term stable operation of the hydraulic pump. It directly determines the working status and service life of the hydraulic pump from multiple dimensions such as control logic, component protection, and system efficiency by maintaining the cleanliness of the pilot oil circuit.

1、 Ensure the normal operation of the core control logic of the hydraulic pump

• High precision requirements for pilot oil circuit: The pilot system uses low flow and low-pressure oil, and directly controls the output flow and power matching of the main hydraulic pump through precision components such as regulators and electromagnetic proportional pressure reducing valves. The clearance between these components is only a few micrometers, which is extremely sensitive to the cleanliness of the oil.
• Avoiding control signal failure: The pilot filter has a filtration accuracy of 10-20 microns, which can intercept impurities such as metal shavings and gum in the oil, prevent impurities from jamming the pump regulator and blocking the electromagnetic proportional pressure reducing valve, ensure accurate transmission of power shift pressure signals, and accurately match the output power of the hydraulic pump with the engine speed.
• Maintain stable control pressure: When the filter element becomes clogged and fails, it can lead to a decrease in pilot oil flow and control pressure, directly causing abnormal flow regulation of the hydraulic pump, resulting in slow overall operation, insufficient power, and other faults.

2、 Directly protect the core precision components of hydraulic pumps

1. Blocking impurities from entering the main pump: Impurities in unfiltered pilot oil will enter the variable mechanism of the hydraulic pump through the control oil circuit, scratching moving parts such as the plunger and distribution plate like sandpaper, causing irreversible surface scratches and abnormal wear.
2. Avoid internal blockage of the pump body: Once the fine oil passages and throttle holes inside the hydraulic pump are blocked by impurities, it will disrupt the lubrication and pressure balance of the pump, causing local overheating, abnormal noise, and even the main pump to get stuck and scrapped. The pilot filter intercepts impurities from the source and avoids such risks in advance.
3. Extending the overall life of hydraulic pumps: The effectively filtered clean oil can significantly reduce the friction loss of the hydraulic pump's moving pair, extending the service life of the main pump by more than 30% and greatly reducing the expensive maintenance or replacement costs of the main pump.

3、 Ensure the overall efficiency and operational safety of the hydraulic system

• Maintaining system pressure stability: Clean pilot oil can ensure that the pressure regulating components of the hydraulic pump work properly, avoiding significant pressure fluctuations, ensuring smooth and accurate equipment operation, and preventing safety accidents caused by sudden pressure changes.
• Avoiding secondary failure chain: If the pilot filter fails, impurities will not only damage the hydraulic pump, but also further contaminate the entire main oil circuit, causing chain wear of other components such as the main valve and motor, resulting in widespread failure of the entire hydraulic system.
• Reduce long-term operation and maintenance costs: Regularly replacing the pilot filter element according to the standard of 1000-2000 working hours can avoid the high expenses of early overhaul or replacement of hydraulic pumps with extremely low maintenance costs, significantly reducing the overall cost of equipment life cycle.