Oil Filter for Sinotruk HOWO Truck WP10 WD615 D10 Engine Spare Parts

Key Performance Features

Filtration Precision and Efficiency
Data from different sources vary. Sinotruk original parts documentation states that filtration efficiency can reach over 98%, using a multi-layer gradient filtration structure: the surface layer pre-filters large particles, while the deep layer uses ultra-fine fibers to intercept micron-level impurities. Another parts supplier page lists a filtration efficiency of ≥99.5% at a particle size of 20 microns, with resin-impregnated cellulose as the filter medium. Another universal replacement model (LF16327) lists a filtration rating of 30 microns.

Contaminant Capacity and Structural Strength
Original documentation emphasizes that the filter paper uses imported long-fiber wood pulp combined with synthetic fiber composite material, providing high contaminant capacity; the center tube uses thickened galvanized spiral steel pipe with high collapse resistance, resisting deformation and collapse under high oil pressure or during cold starts. The filter assembly undergoes burst and differential pressure testing to verify its pressure resistance.

Bypass Valve Protection Mechanism
The filter has a built-in bypass valve, typically set to open at around 2.5 bar. When the filter element becomes clogged with contaminants causing excessive differential pressure, or when oil viscosity is too high (such as during cold starts), the bypass valve opens to ensure that unfiltered oil can still reach lubrication points, preventing engine damage from oil starvation. However, bypass valve opening means contaminants are not intercepted, so the filter element must be replaced on schedule and must not be used beyond its service life.

Sealing and Temperature Adaptability
The seal ring uses high-temperature-resistant rubber material. Original documentation states it uses hydrogenated nitrile rubber (HNBR), which maintains elasticity under operating conditions from -40°C to 140°C; another source lists an operating temperature range of -40°C to +150°C. Good sealing prevents oil leakage and bypass, ensuring filtration effectiveness.

Installation and Maintenance Points
Engines such as the WD615 use spin-on oil filters, and some models have a dual-canister parallel structure. The filter must be replaced at the same time as the oil change; never change only the oil without changing the filter element. During installation, apply a small amount of new oil to the seal ring surface, first hand-tighten until the seal ring contacts, then tighten moderately to the specified torque. Avoid using tools with excessive force, which may deform the threads or damage the seal ring.