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Scania 1393639 Fuel Filter Separator – Optimal Fuel Purity and Engine Protection for Heavy-Duty Applications
The Scania 1393639 Fuel Filter Separator is a high-performance filtration component designed to remove impurities and water from diesel fuel before it enters the engine’s injection system. In the world of heavy-duty trucking, clean fuel is vital for maintaining engine efficiency, preventing damage to precision components, and ensuring reliable operation over long distances. This Scania fuel filter separator is engineered specifically for Euro 6 engines used in Scania’s R, G, and P Series trucks, among others.
Diesel fuel contamination is one of the most common causes of premature engine wear, poor fuel efficiency, and injection system failures. The 1393639 fuel filter separator serves as a critical defense mechanism against dirt, water, and particulates, offering maximum protection to the engine’s sensitive fuel system components.
Overview of the Scania 1393639 Fuel Filter Separator
The 1393639 is a genuine OEM filter element that fits into Scania’s modular fuel filter housing. It is designed to work with high-pressure common rail injection systems that demand clean, dry fuel for optimal combustion and emissions control.
Technical Specifications:
- Part Number: 1393639
- Function: Primary fuel filtration and water separation
- Filtration Rating: Typically 5–10 microns
- Construction: Multi-layer media with water-repellent coating
- Housing Type: Cartridge insert for spin-on or bowl-type filter assembly
- Compatibility: Scania Euro 6 engines (varies by model year and engine family)
- Additional Feature: Integrated water drain port or sensor port (depending on configuration)
Key Functions and Benefits
1. Fuel System Protection
The filter effectively removes dirt, rust particles, and other contaminants that could cause abrasion and clogging in high-precision fuel injectors, pumps, and valves. This helps prolong the lifespan of the fuel system and maintain injection accuracy.
2. Water Separation
Water in diesel fuel can lead to injector corrosion, poor atomization, microbial growth, and freezing in cold climates. The 1393639 features a hydrophobic layer that repels water, forcing it to settle at the bottom of the separator chamber where it can be drained or detected via a sensor.
3. Improved Engine Performance
Clean fuel allows for better combustion, which translates into more consistent power delivery, smoother engine operation, and lower fuel consumption.
4. Emissions Compliance
High-efficiency filtration supports stable combustion and cleaner exhaust gases, enabling the engine to meet Euro 6 emissions regulations and extend the lifespan of downstream components like the diesel particulate filter (DPF) and SCR system.
5. OEM Quality and Fitment
As a genuine Scania part, the 1393639 filter ensures exact fitment, correct flow characteristics, and compatibility with onboard diagnostics and water detection systems.
Maintenance and Service Recommendations
To maintain optimal performance, Scania recommends replacing the 1393639 fuel filter separator according to the service interval specified in the vehicle’s maintenance manual—typically every 60,000 to 80,000 kilometers, or more frequently in dusty or humid environments.
Signs That Your Fuel Filter Needs Replacement:
- Hard engine starting
- Reduced engine power or acceleration
- Increased fuel consumption
- Unusual engine noise
- Fuel system warning light
When replacing the filter:
- Always use OEM filters to ensure correct flow and separation efficiency
- Drain any water accumulation before removing the old filter
- Lubricate O-rings before installation to prevent leaks
- Prime the fuel system if required to remove air pockets
- Reset service indicators via diagnostic tools
Applications and Compatibility
The Scania 1393639 Fuel Filter Separator is widely used in:
- Scania R-Series Euro 6
- Scania G-Series and P-Series trucks
- Engines including DC09, DC13, and DC16
- Vehicles equipped with Scania’s modular fuel filtration system
Always confirm the part’s compatibility using the truck’s VIN or engine code. Cross-reference may be required for vehicles with optional equipment or non-standard fuel system configurations.
Installation Tips
- Ensure the engine is off and cooled down
- Clean the filter housing and mating surfaces before installation
- Check for correct orientation—installing the filter upside-down can cause fuel flow issues
- Use a torque wrench to avoid overtightening and damaging the housing
If equipped with a water sensor, reconnect and test the sensor connection after filter installation. Scania diagnostics systems will alert the driver if the water level exceeds safe limits.
Environmental Considerations
Used fuel filters should be disposed of according to environmental regulations. They contain hazardous material and must be treated as automotive waste. Many workshops and fleet service centers offer disposal services as part of routine maintenance packages.
Scania 1393639 Fuel Filter Separator
The Scania 1393639 Fuel Filter Separator is a critical component for maintaining the health and efficiency of Scania’s Euro 6 diesel engines. With its dual functionality of particulate filtration and water separation, it ensures consistent fuel quality, improves engine longevity, and supports emissions compliance.
Fleet operators, independent workshops, and authorized service centers should prioritize genuine filters like the 1393639 to avoid costly fuel system repairs and unplanned downtime. For reliability, compatibility, and proven performance, Scania’s OEM filtration components remain the benchmark.
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