1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your AirDog Pre-Filter WS100 and Fuel Filter FF100-2 Combo Pack. These replacement filters are designed to maintain optimal performance of your AirDog, AirDog II, and AirDog II-4G diesel fuel filtration systems by effectively removing contaminants and moisture from your diesel fuel.
A plugged fuel filter can lead to reduced fuel pressure and flow to your diesel engine, impacting performance and potentially causing damage. Regular replacement of these filters is crucial for the longevity and efficiency of your fuel system.
Figure 1: AirDog Pre-Filter WS100 and Fuel Filter FF100-2 Combo Pack.
2. Specifications
| Feature | Detail |
|---|---|
| Brand | Airdog |
| Model Numbers | FF100-2 (Fuel Filter), WS100 (Water Separator) |
| Fuel Type | Diesel |
| Fuel Filter Micron Rating | 2 micron (FF100-2) |
| Product Grade | Replacement Part |
| Outer Material | Plastic |
| Vehicle Service Type | Passenger Car, SUV, Truck, Van |
| Item Weight | 1.8 Pounds |
| Product Dimensions | 22.25 x 13.75 x 9 inches (packaging) |
| Manufacturer | PureFlow AirDog |
| Automotive Fit Type | Universal Fit |
| UPC | 784672808293, 712029716939, 687748621317 |
3. Installation and Setup
This section outlines the general procedure for replacing the AirDog fuel filter and water separator. Always refer to your specific AirDog system's manual for detailed, model-specific instructions and safety precautions.
Safety Precautions:
- Ensure the vehicle is turned off and the engine is cool.
- Wear appropriate personal protective equipment, including gloves and eye protection.
- Have a suitable container ready to catch any spilled diesel fuel.
- Work in a well-ventilated area.
Procedure:
- Locate Filters: Identify the existing AirDog fuel filter (FF100-2 equivalent) and water separator (WS100 equivalent) on your vehicle's fuel system. These are typically mounted on the frame rail.
- Prepare for Drainage: Place a drain pan or suitable container directly beneath the filters to collect diesel fuel.
- Remove Old Filters:
- Carefully loosen and remove the old water separator (WS100) first. Expect some fuel to drain.
- Next, loosen and remove the old fuel filter (FF100-2).
- Dispose of the old filters and drained fuel according to local environmental regulations.
- Install New Filters:
- Ensure the new filters are clean and free of debris.
- Apply a thin film of clean diesel fuel to the new filter gaskets to ensure a proper seal.
- Thread the new water separator (WS100) onto its housing. Hand-tighten until snug, then use a filter wrench to tighten an additional 1/4 to 1/2 turn, or as specified by your AirDog system manual.
- Thread the new fuel filter (FF100-2) onto its housing. Hand-tighten until snug, then use a filter wrench to tighten an additional 1/4 to 1/2 turn, or as specified by your AirDog system manual.
- Prime the Fuel System:
- After installing new filters, the fuel system must be primed to remove air.
- Turn the ignition key to the "ON" position (without starting the engine) for approximately 30 seconds. This activates the fuel pump to fill the filters.
- Repeat this "ON" cycle several times until the fuel pump's sound changes, indicating that the filters are full and the system is primed.
- Check for any leaks around the newly installed filters.
- Start Engine: Once the system is primed and no leaks are detected, start the engine. Allow it to idle for a few minutes and re-check for leaks.
Figure 2: AirDog WS100 Water Separator, ready for installation.
Figure 3: AirDog FF100-2 Fuel Filter, a 2-micron filter for optimal fuel cleanliness.
4. Operating Instructions
Once properly installed and the fuel system is primed, the AirDog Pre-Filter and Fuel Filter operate automatically as part of your vehicle's fuel delivery system. No further user interaction is required during normal operation.
The system continuously filters diesel fuel, removing contaminants and separating water to protect your engine's sensitive components.
5. Maintenance
Regular maintenance, specifically the timely replacement of the WS100 Water Separator and FF100-2 Fuel Filter, is critical for the optimal performance and longevity of your AirDog fuel system and your vehicle's engine.
Replacement Schedule:
- Consult your AirDog system's specific manual for recommended service intervals.
- General recommendations often suggest replacement every 15,000 to 30,000 miles, or annually, whichever comes first. However, operating conditions (e.g., fuel quality, heavy usage) may necessitate more frequent changes.
- The video content showed filters that had been on the truck for approximately 30,000 miles and were overdue for replacement, indicating significant contamination.
Signs of a Clogged Filter:
- Reduced engine power or acceleration.
- Rough idling or engine hesitation.
- Difficulty starting the engine.
- Decreased fuel efficiency.
- Illumination of a "Check Engine" light or fuel system warning indicator.
If you experience any of these symptoms, inspect your filters and replace them if necessary, even if they haven't reached the recommended service interval.
6. Troubleshooting
Most issues related to the AirDog filtration system can be resolved by ensuring proper installation and timely filter replacement.
Common Issues and Solutions:
- Low Fuel Pressure/Flow: This is a primary indicator of a clogged fuel filter or water separator.
- Solution: Replace both the FF100-2 Fuel Filter and WS100 Water Separator. Ensure the system is properly primed after replacement.
- Fuel Leaks After Installation:
- Solution: Check that filters are tightened correctly (hand-tight plus 1/4 to 1/2 turn with a wrench). Ensure gaskets are properly seated and not pinched or damaged.
- Engine Cranks but Won't Start (After Filter Change):
- Solution: The fuel system may not be fully primed. Repeat the priming procedure (turning ignition to "ON" several times without starting the engine) until the fuel pump sound stabilizes.
If issues persist after following these troubleshooting steps, it is recommended to consult a qualified diesel mechanic or contact AirDog customer support.
7. Warranty and Support
For specific warranty information regarding your AirDog Pre-Filter WS100 and Fuel Filter FF100-2 Combo Pack, please refer to the documentation included with your original AirDog fuel system or contact PureFlow AirDog directly. Warranty terms and conditions may vary.
For technical support, installation assistance, or further inquiries, please visit the official Airdog website or contact their customer service department. Always provide your product model numbers (FF100-2, WS100) and any relevant system details when seeking support.
Figure 4: Official AirDog Fuel Preporator logo.
