SN55018 Fuel Water Separator Filter

SN55018 Product Summary

The SN55018 fuel water separator filter removes emulsified water and solid contaminants from diesel, protecting high-pressure common rail injection systems in heavy-duty Komatsu and generator equipment.

SN55018 Technical Specifications

SN55018 Engineering Mechanics & Material Architecture

Hydrophobic Coalescing Filtration Media

Engineered with multi-layered hydrophobic media that coalesces microscopic emulsified water droplets into larger beads, allowing them to settle cleanly into the transparent collection bowl while trapping abrasive particles.

Transparent Water Collection Bowl Interface

Integrated with a clear, high-impact collection bowl and drain port (1/2"-20 UNF thread), allowing maintenance crews to perform instant visual inspections and purge accumulated water without disassembling the filter.

Corrosion-Resistant Structural Casing

Encased in a heavy-gauge steel canister featuring a durable white protective finish, designed to withstand intense hydraulic fuel pulses, mechanical vibration, and high system pressure without deformation or bypass.

SN55018 Worksite Hazards & Protection Strategies

Severe Mining & Heavy Earthmoving Operations

Site Hazard: Water condensation in bulk fuel storage tanks, fine silt, and rust scale contaminates fuel lines during continuous high-load operations.

Protection Strategy: Separates free and emulsified water before diesel reaches high-pressure pumps and injectors, preventing precision component corrosion, scoring, and costly engine downtime.

High-Capacity Power Generation & Logistics

Site Hazard: Fuel quality degradation during long-term generator standby or extended continuous running of heavy haulers.

Protection Strategy: Delivers consistent fuel purification to protect fuel injectors, preventing power loss, erratic idling, and fuel combustion inefficiencies.

SN55018 Application & Cross-Reference

Cross-Reference Index

• ■HiFi Filter: SN 55018 / SN55018
• ■Fleetguard: FS19946
• ■Mann Filter: WK 13 003 / WK13003
• ■Donaldson: P553200

Fleet & Equipment Applications

Komatsu Heavy Mining & Earthmoving Equipment

• ■Crawler Dozers: D155AX-6, D65EX-15, D65PX-15
• ■Dump Trucks & Articulated Haulers: HD325-7, HD325-7R, HD405-7, HD465-7, HD605-7, HD785-7, HD787-7, HM300-1, HM300-2, HM300-3, HM300-5, HM300-5E0, HM350-2, HM400-2, HM400-3
• ■Excavators & Mobile Crushers: PC400-7 LC, PC450-7 LC, BR580JG-1
• ■Wheel Loaders & Graders: WA450-6, WA470-6, WA470-7, WA480-5, WA480-5H, WA480-6, WA500-6, WA500-7, WA600-6, WA800-3EO, GD705A-4A
• ■Diesel Engines: S6D140E-5

Industrial Power Generation & Diesel Engines

• ■Mitsubishi: S12R-F1TAW2
• ■SDMO: T 1650

SN55018 Field Maintenance Protocol

Installation & Maintenance Sequence

• ■Drain & Remove: Open the bottom drain valve to empty trapped water and fuel into a container, then unscrew the old filter element using a filter wrench.
• ■Bowl Transfer & Seal: Clean the clear collection bowl, inspect all elastomeric seals, apply a light coat of clean diesel fuel to the fresh gasket, and reattach the bowl onto the new SN55018 filter base.
• ■Hand Tighten: Spin the filter assembly onto the mounting header until the gasket contacts the seating face, then tighten an additional 3/4 to 1 full turn by hand.
• ■Prime & Water Purge: Prime the fuel circuit to remove trapped air pockets, start the engine, and check for leaks. Perform routine manual water drainage during daily pre-shift inspections.

Service Threshold Indicators

• ■Visible water accumulation layer reaching the drain line mark in the clear collection bowl.
• ■Water-in-fuel (WIF) sensor warning indicator illuminated on the cab control panel.
• ■Engine power hesitation, hard starting, or fuel line pressure drop under full operating load.

Custom Manufacturing & Supply Services

B2B Private Labeling & OEM Branding

• ■Custom Marking: Direct laser printing or screen printing of buyer part numbers, custom logos, and lot codes on the filter canister shell.
• ■Export Packaging: Sealed moisture-proof poly-bags, individual color box packaging, and heavy-duty corrugated export master cartons for safe transport.

Order Workflow