5.Check pump oil level, see Compressor Pump Oil under Maintenance.

CAUTION: Do not operate without oil or with inadequate oil. DEWALT is not responsible for compressor failure caused by inadequate oil.

6.Check engine's oil and fuel level, see engine's instruction manual for correct procedures.

7.Visually inspect drive belt. Replace belt if frayed, cracked, or worn. NOTE: Outer belt cover must be removed to inspect drive belt.

8.Ensure all guards, covers, and labels are in place, legible (for labels) and securely mounted. Do not use compressor until all items have been verified.

Initial Set-up

Read safety instructions before setting-up air compressor.

BREAK-IN PROCEDURE

WARNING: Risk of property damage. Serious damage may result if the following break-in instructions are not closely followed.

This procedure is required:

•Before the air compressor is used for the first time.

•When the unloader valve has been replaced.

•When the compressor pump has been replaced.

The procedure:

1. Follow Pre-Start Checklist under Preparation for Use.

2. Rotate the unloader's manual lock to the open position to prevent air tank pressure buildup.

3. Open the pressure regulator. Pull regulator knob (F) out and rotate clockwise until it stops.

WARNING: Do not operate this unit until you read and understand the engine instruction's manual for safety, operation and maintenance instructions.

4.Prepare engine for first time use, see engine's instruction manual for correct procedure.

5.Turn the engine ON/OFF switch (C) to the ON Position.

6.Start engine, see engine's instruction manual for correct procedure.

7.Run the air compressor for 30 minutes to seat the rings and lubricate all the internal surfaces. Ensure there is no pressure build up in the air tank by observing the reading on the air tank pressure gauge.

8.Rotate the manual lock on the unloader valve into the closed position so the air tank pressure can build.

9.Close the pressure regulator. Rotate the regulator knob (F) counterclockwise to its built-in stop and push knob in to lock in place. This will allow air to build pressure in the air tank.

10.Compressed air will be available from the hose air outlet until it is used up or bled off.

OPERATING PROCEDURES

Start-up (Fig. 1)

1.Follow Pre-Start Checklist under Preparation for Use.

2.Pull out and turn regulator knob (F) counterclockwise until fully closed. Push in to lock. Regulated pressure gauge should read 0 PSI (0 kPa).

3.Rotate the manual lock unloader lever to the open position to assist with start up.

4.Turn the engine ON/OFF switch (C) to the ON Position.

5.Start engine, see engine's instruction manual for correct procedure.

6.Rotate manual lock unloader lever to the closed position to allow air tank pressure to build. NOTE: Pump will not operate with the manual lock unloader lever in the open position.

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DeWalt D55273 Initial Set-up, Operating Procedures, Start-up Fig, BREAK-IN Procedure, This procedure is required
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D55273 specifications

The DeWalt D55273 is a robust and highly efficient pneumatic air compressor designed to meet the needs of both professionals and DIY enthusiasts. Renowned for its reliability and performance, this model is particularly popular among contractors involved in framing, roofing, and other heavy-duty applications.

One of the standout features of the D55273 is its high-efficiency compressor pump, which delivers an impressive air output while minimizing downtime. The unit boasts a powerful motor that operates at a substantial 4.5 CFM at 90 PSI, allowing it to quickly recharge the tank and maintain consistent pressure for various pneumatic tools. This ensures that users can work continuously without frequent interruptions for recharging.

The D55273 incorporates DeWalt's patented Quiet Technology, making it one of the quieter options in the industry. With a sound level of just 75 dBA, this compressor is ideal for indoor jobs or residential areas where noise levels are a concern. This feature not only enhances user comfort but also reduces the noise pollution that often accompanies pneumatic tools.

Durability is a key characteristic of the D55273. Constructed with high-quality materials, it features a rugged, oil-free pump that requires minimal maintenance and prolongs the life of the compressor. Additionally, the unit is designed with a sturdy frame, making it easy to transport and store without worrying about damage. The integrated handle and rubber grip make it convenient to maneuver on job sites.

Another notable technological advancement in the D55273 is its efficient cooling system. This air compressor is designed with an advanced airflow system that optimizes cooling during operation, reducing the risk of overheating. This capability ensures reliability during extended use, providing peace of mind to users working on demanding projects.

Furthermore, the unit comes equipped with dual quick couplers, allowing for simultaneous connections of two tools, increasing productivity on the job site. The pressure gauges provide accurate readouts, enabling users to easily monitor and adjust the pressure to suit various applications.

Overall, the DeWalt D55273 air compressor combines power, efficiency, and user-friendly features to provide a reliable solution for all pneumatic needs. Whether tackling a large construction project or a small home improvement task, this air compressor delivers the performance and durability professionals demand.
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