Fuel Filter, Screw-On Water Separator - P551855

Donaldson Company Fuel Filter, Screw-On Water Separator Part No: P551855

$40.74

The Donaldson P551855 screw-on fuel filter with water separator delivers reliable diesel engine protection. Its high-efficiency media captures contaminants and separates water from fuel, preventing damage to pumps and injectors. The durable screw-on design allows fast and secure installation or replacement under heavy-duty conditions. Ideal for trucks, fleet vehicles, and industrial equipment, this filter ensures consistent fuel flow, enhances engine efficiency, reduces maintenance costs, and prolongs the service life of essential fuel system components.

Specifications

The Donaldson P551855 screw-on fuel filter with water separator is engineered to provide superior protection for diesel engines. Its high-efficiency filtration media removes fine particles while separating water from fuel, preventing damage to pumps, injectors, and other critical components. The durable screw-on design enables quick and reliable installation even in harsh environments. Suitable for commercial trucks, fleet vehicles, and industrial machinery, the P551855 enhances fuel system reliability, reduces maintenance costs, extends component life, and ensures consistent long-term engine performance under demanding conditions.

Efficiency Test Std: ISO 4402/11171
Type: Primary
Gasket ID: 3.15 IN
Efficiency 95%: 10 MICRON
Primary Application: RACOR R90T
Style: Spin-On
Outer Diameter: 107.7 MM
Overall Length: 155.2 MM
Thread Size: 1-14 UN
Gasket OD: 3.54 IN
Emulsified H2O Efficiency: 95 PERCENT
Bowl Thread: 3 3/4-10 BUTT (ANSI B1.9)
Length: 143.5 MM

Weight

1.8700

Compatibility

Volvo D-series trucks using 20879806 / Racor R90T specification

Mack trucks using 21017305 filter spec

Commercial diesel trucks fitted with Racor style water separator systems