WIX Filters 33686 Diesel Fuel Filter Water Separator

Description:

The WIX 33686 Fuel Filter is used in heavy-duty diesel fuel delivery systems for filtering contaminants and water before fuel reaches injectors and engine fuel system components. Commonly installed in Caterpillar engines, commercial trucks, construction equipment, generators, and industrial diesel-powered machinery requiring spin-on fuel filtration. Maintenance teams, diesel technicians, and fleet service facilities use this fuel filter for preventive maintenance, fuel system servicing, and replacement of contaminated or restricted diesel fuel filters.

Applications:

The WIX 33686 fuel filter is widely used in heavy-duty diesel environments requiring dependable fuel filtration for injector protection and reliable fuel delivery performance. It is commonly integrated into Caterpillar diesel engines used in construction equipment, commercial fleet vehicles, industrial machinery, mining equipment, and generator systems where clean fuel delivery is critical for maintaining injector performance, reducing fuel system wear, improving fuel efficiency, and extending engine service life. The spin-on design supports simplified maintenance and efficient contaminant removal in demanding industrial and off-road applications.

Technical Specifications:

• Brand: WIX
• Part Number: 33686
• Product Type: Fuel Filter
• Filter Style: Spin-On Fuel Filter
• Compatible Fuel Type: Diesel
• Filtration Media: Enhanced Cellulose
• Nominal Micron Rating: 4 Micron
• Height: 7.338 Inches
• Outer Diameter Top: 3.66 Inches
• Thread Size: 1-14
• Maximum Flow Rate: 8–10 GPM
• Burst Pressure: 290 PSI
• Gasket Outside Diameter: 2.834 Inches
• Gasket Inside Diameter: 2.462 Inches
• Application Type: Heavy-Duty Diesel Fuel Filtration
• Installation Type: Spin-On Mounting
• Function: Fuel Contaminant and Water Removal
• Compatible Equipment: Caterpillar Engines, Industrial Diesel Systems
• Industry Applications: Construction, Mining, Industrial Equipment, Fleet Maintenance
• Cross Reference: NAPA Gold 3686
• OEM References: Caterpillar 1R0751, Fleet guard FF5320, Donaldson P551313
• Operating Function: Diesel Fuel System Protection and Injector Filtration 

Common Replacements:

• Baldwin BF7635
• Fleetguard FF5320
• Donaldson P551313