Fuel Filter P550880 FF165 BF7957 BF7922 FF5420 Parameter:
Part Number	P550880 FF165 BF7957 BF7922 FF5420
Brand	Tamfiney
Weight	734g
Height	170 mm
Outer Diameter	94 mm
Inner Diameter/ Thread Size	M20×1.5
Minimum Order	100 PCS
Place of Region:	Zhejiang, China
Payment Terms:	T/T
Price Terms:	FOB
Lead Time:	30 to 50 days based on order quantities
Market Type:	After Market
Current Export Market:	Southeast Asian,North America, South America, Western Europe, Eastern Europe, Africa, Oceania

What does P550880 fit?

AGRIFAC  CONDOR CLEREANCECONDOR ENDURANCECONDOR WIDE TRACK PLUS
ATLAS COPCO  QAS 150 S5QAS+ 160QAS 200 ST5
BMC  628 UHBBELDE 220 SLFFALCON 1100FATHI 180 EURO4FE 1100 STGR 2532 BLTGR 2532 WBDTGR 2532 WBLTGR 3232
GROVE  CD 7755GMK 5170GMK 5220RT 500 E-2RT 530  880 E4RT 890 E3RT 890 E4RT 890 E4YB 7722 XLYB 7725YB 7725-4 / CD7725-4
HIMOINSA  HFW 100 T5HFW 130 T5HFW 200HFW 200 T5HFW 85 T5 INS 50 HZHIW 200 T5HRFW 100 T5 INSHRFW 160 T5 INSHRFW 200 T5HRFW 250 T5 S5HRFW 85 T5HYW 45HYW 45 T5HYW 55HYW 60
HITACHI  ZW 140ZW 140 PLZW 150ZW 150 PLZW 180ZW 220
HORSCH  Leeb 5.230 PTLeeb 5.300 PTLeeb 6.230 PTLeeb 6.300 PTLeeb 7.300 PTLeeb 8.300 PT
HSM  208 F208 S208 S405405 H3 VISION805 CONV805 HD805 S904 H 1904 H 2904 S904 S-MATIC904 ZF

Professional Donaldson Diesel Fuel Filter P550880 FF165 BF7957 BF7922 FF5420

Q: Should I pre-fill a new diesel fuel filter?

It is not recommended to pre fill a new diesel fuel filter, especially for modern diesel engines. Reasons and risks:
High risk of impurities entering the fuel injector: The internal cavity of the diesel filter may contain dust and impurities in an unfiltered state. Directly injecting oil can cause these particles to enter the precision fuel injector with diesel, causing wear and even scrapping.

Modern diesel systems require extremely high cleanliness: the working pressure of the common rail injection system can reach over 2000 bar, and small particles can cause nozzle blockage or damage, resulting in extremely high maintenance costs.
The correct approach is to complete self filling through exhaust: After the installation of the new filter, it should be drained and self filled through a manual oil pump or an electronic control oil pump to ensure that diesel is filtered through the filter element before entering the fuel system.

Q: How important is a diesel fuel filter?

Diesel fuel filters play a crucial role in diesel engine systems, and their importance can be summarized from the following aspects:
• Protection of precision components: The clearance between the fuel injector components of modern high-pressure common rail diesel engines is only 2-4 microns, and any small impurities may cause wear, jamming, or even failure. Diesel filters can effectively intercept particles larger than 3-5 microns, preventing damage to key components such as fuel injection pumps and nozzles.

• Separation of moisture: Moisture mixed in diesel can cause sulfur to react with water to produce hydrochloric acid, which can corrode internal parts such as cylinder liners and pistons; Simultaneously causing rust and poor lubrication. High quality filters have a moisture separation efficiency of ≥ 95%, and some models also integrate a drain valve or electronic alarm function.
• Ensure combustion efficiency and emission standards: Clean fuel improves combustion adequacy, reduces black smoke, power degradation and other issues, and meets the emission standards of China VI and above.
• Extend engine life: By filtering fuel through one of the "three filters" (air, oil, and fuel), abnormal wear is significantly reduced, reducing the risk of major repairs.

Q: What clogs a diesel fuel filter?

Diesel filter blockage is mainly caused by the following reasons:
• Poor fuel quality: Poor quality diesel contains a lot of impurities, gum, or moisture, and long-term use can accelerate filter clogging.
• Long term non replacement of filter element: The filter has a service life, and if it is not replaced according to the recommended cycle (usually every 5000-10000 kilometers or 100-200 hours), impurities will accumulate and cause blockage.
• Ice formation in fuel water separator: In winter, if the accumulated water in the oil-water separator is not discharged in a timely manner, the water will freeze and block the oil circuit when the temperature is below 0 ° C.

• Salt or other foreign substances mixed into fuel: If salt is added to the fuel tank, salt particles will flow with diesel and accumulate on the filter element, causing serious blockage and corrosion of metal parts.
• Metal particles generated by engine wear: enter the filter with fuel and accumulate for a long time, leading to blockage.
Dirty oil pipes or joint filters: Improper cleaning or long-term failure to clean can also cause local oil circuit blockages.
• Diesel wax crystals precipitate at low temperatures: When the ambient temperature is below the cold filter point of diesel, wax crystals can clog the filter screen, affecting fuel supply.