Sany Original Pilot Filter Assembly: B229900000063 High-Pressure Filter PYFL-H20×10LS, suitable for all Sany machine models.

Sany Original High-Pressure Pilot Filter Assembly | B229900000063 (Model PYFL-H20×10LS)
I. Coding Information
- Original Factory Part Number: B229900000063
- National Standard Series Model: PYFL-H20×10LS (H indicates high pressure, 20 port size, 10μm filtration accuracy, LS pipe installation type)
- Aliases: Pilot High-Pressure Filter Element Assembly, Main Control Valve Inlet Filter
II. Product Structure Parameters
1. Housing: Cast steel painted housing with external threaded oil ports (M18×1.5 standard oil ports) at both ends, 4-hole flange fixing structure, capable of withstanding 21MPa high-pressure conditions;
2. Built-in Filter Element: Glass fiber folded filter material, 10μm filtration accuracy, pressure-resistant and impact-resistant, equipped with a bypass overflow valve (opens at 0.35MPa pressure differential);
3. Installation Type: Pipe series connection, straight-through oil port layout.
III. Compatible Models
Sany SY205/215/235/245/265/305/335/365 full series of medium and large excavators, dedicated for the pilot pump → main control valve inlet oil circuit.
IV. Core Functions
1. Precise Pilot Oil Filtration: Intercepts iron filings and impurities in the pilot oil circuit, protecting pilot solenoid valves, valve spools, and operation levers, preventing valve spool sticking and operational deviation;
2. Built-in Overflow Protection: When the filter element is clogged and the pressure differential exceeds the limit, the bypass valve opens automatically to ensure continuous pilot oil supply, avoiding complete machine inactivity;
3. Stable Pilot Oil Pressure: Removes fine particles to maintain stable pilot control pressure, eliminating erratic operation speeds.
V. Faults and Maintenance
Fault Phenomenon (Filter Element Clogging)
- Excavator operation hesitation, slow single action, deviation;
- Fluctuating pilot pressure, unresponsive lever operation;
- Individual cylinders inoperative, frequent valve spool sticking.
Replacement Cycle
- Normal Conditions: Disassemble and replace the built-in filter element every 2000 hours;
- Harsh Mining Conditions: Replace every 1000 hours.
VI. Accompanying Filter Elements
The assembly includes a separately replaceable filter element with part number A222100000119. The inner core can be purchased separately to avoid replacing the entire assembly, reducing maintenance costs.