1. Introduction
This manual provides essential information for the safe operation, maintenance, and troubleshooting of your DEWALT D55168 Vertical Portable Air Compressor. Please read and understand all instructions before using the product.
The DEWALT D55168 is a 1.9 HP vertical portable air compressor designed for various applications. It features a 15-gallon tank with a maximum storage pressure of 200 PSI, delivering 5.0 SCFM at 90 PSI for efficient air tool operation. The unit is equipped with an oil-free, maintenance-free pump and operates at a quiet 78 dBA noise level, making it suitable for diverse work environments. Its compact design and robust handle ensure ease of transport and storage.
Image 1.1: The DEWALT D55168 Vertical Portable Air Compressor, showcasing its overall design and portability.
2. Safety Information
Always observe basic safety precautions to reduce the risk of fire, electric shock, and personal injury when using this product. Keep this manual for future reference.
- Read all instructions: Familiarize yourself with the compressor's controls and proper usage.
- Wear eye protection: Always wear ANSI Z87.1 compliant safety glasses with side shields.
- Wear hearing protection: Prolonged exposure to noise can cause hearing damage.
- Disconnect power: Always unplug the compressor before performing any maintenance or adjustments.
- Proper ventilation: Operate the compressor in a well-ventilated area.
- Drain tank daily: Condensation can lead to rust and tank failure.
- Use appropriate extension cords: If an extension cord is necessary, use a 12-gauge or heavier cord, 50 feet or less in length.
3. Setup
3.1 Unpacking and Inspection
Carefully remove the compressor from its packaging. Inspect the unit for any damage that may have occurred during shipping. If any parts are damaged or missing, do not operate the compressor. Contact DEWALT customer service.
3.2 Component Overview
Image 3.1: Key features of the DEWALT D55168, including the dual-purpose handle, metal console panel, oil-free pump, 200 PSI max tank storage pressure, and compact design.
Image 3.2: Close-up of the dual-purpose handle, which provides protection for the compressor during transport and use.
Image 3.3: The metal console panel protects the gauges, coupler, and regulator from damage.
Image 3.4: The wide track, semi-pneumatic tires facilitate easy movement and stability of the compressor.
3.3 Power Connection
Connect the compressor to a standard 120-volt electrical outlet. Ensure the circuit can handle the compressor's power requirements. If an extension cord is necessary, use a 12-gauge or heavier cord, not exceeding 50 feet in length, to maintain consistent amp draw and prevent motor damage.
3.4 Initial Startup
Before first use, ensure the tank drain valve is closed. Plug in the compressor and turn it on. Allow the tank to fill completely until the motor shuts off automatically. This process may take several minutes. For newer models (Type 2 and above), a specific break-in procedure with an open drain valve is not required, unlike some older revisions.
4. Operating Instructions
4.1 Connecting Air Tools
Attach your air hose to the universal coupler on the compressor's console panel. Ensure the connection is secure to prevent air leaks. Then, connect your desired air tool to the other end of the hose.
4.2 Adjusting Pressure
The compressor features a regulator knob on the console panel. Turn the knob clockwise to increase the regulated air pressure and counter-clockwise to decrease it. Monitor the regulated pressure gauge to set the appropriate PSI for your air tool. The tank pressure gauge displays the total pressure inside the tank.
4.3 Using the Compressor
Once the desired pressure is set, you can begin using your air tool. The compressor will automatically cycle on and off to maintain the tank pressure within its operating range (up to 200 PSI).
Image 4.1: The DEWALT D55168 compressor in use for automotive maintenance, demonstrating its application with air tools.
Image 4.2: The DEWALT D55168 compressor powering a nail gun for woodworking projects.
4.4 Shutting Down
When finished, turn off the compressor and unplug it from the power source. Release all air pressure from the tank by opening the drain valve or using an air tool until the gauges read zero. This is a critical step for safety and to prevent tank corrosion.
5. Maintenance
Regular maintenance ensures the longevity and safe operation of your air compressor.
5.1 Draining the Tank
Daily: Open the drain valve located at the bottom of the tank to release any accumulated moisture. This prevents rust and corrosion inside the tank, which can lead to tank failure. Close the valve tightly after draining.
5.2 Cleaning
Keep the compressor clean and free of debris. Wipe down the exterior with a damp cloth. Ensure the motor's cooling fins and air intake vents are clear of obstructions to prevent overheating. The D55168 features an oil-free pump, eliminating the need for oil changes or lubrication.
Image 5.1: The high-efficiency motor of the DEWALT D55168, designed for reliable performance.
5.3 Inspection
Periodically inspect all hoses, fittings, and electrical cords for wear, damage, or leaks. Replace any damaged components immediately. Check that all fasteners are tight.
6. Troubleshooting
This section addresses common issues you might encounter with your air compressor.
| Problem | Possible Cause | Solution |
|---|---|---|
| Compressor does not start or stops unexpectedly. | No power, tripped circuit breaker, thermal overload, low voltage. | Check power connection, reset breaker, allow motor to cool, use proper extension cord. |
| Air leaks. | Loose fittings, damaged hose, faulty valve. | Tighten fittings, replace damaged hose/valve. |
| Compressor runs continuously or frequently. | Air leak, excessive air consumption, check valve issue. | Check for leaks, ensure air tool usage matches compressor capacity, contact service if check valve is suspected. |
| Low air pressure. | Regulator set too low, air leaks, worn pump components. | Adjust regulator, check for leaks, contact service for pump inspection. |
7. Specifications
| Feature | Specification |
|---|---|
| Brand | DEWALT |
| Model Number | D55168 |
| Voltage | 120 volts |
| Power Source | Corded Electric |
| Maximum Horsepower | 1.9 hp |
| Tank Volume | 15 gallons |
| Maximum Pressure | 200 psi |
| Air Flow Capacity | 5.4 cfm at 90 psi |
| Noise Level | 78 dBA |
| Pump Type | Oil-Free, Maintenance-Free |
| Item Weight | 4.67 kg (approximately 10.3 lbs) |
| Dimensions (L x W x H) | 24.5" x 20" x 44.75" |
| Included Components | Fasteners & Hooks, Hardware, hardware-nut-and-bolt-sets |
8. Warranty and Support
DEWALT products are manufactured to high-quality standards. For information regarding warranty coverage, service, or replacement parts, please refer to the warranty card included with your product or visit the official DEWALT website. Keep your purchase receipt as proof of purchase.
For additional support or to locate an authorized service center, please visit the DEWALT Store on Amazon or consult the official DEWALT customer service channels.