SERVICE AND ADJUSTMENTS

ALL MAINTENANCE AND REPAIR OPERATIONS NOT LISTED MUST BE PERFORMED BY TRAINED SERVICE TECHNICIAN.

Risk of Unsafe Operation. Unit cycles automatically when power is on. When servicing, you may be exposed to

voltage sources, compressed air, or moving parts. Before servicing unit unplug or disconnect electrical supply to the air compressor, bleed tank of pressure, and allow the air compressor to cool.

To Replace or Clean Check Valve

1.Release all air pressure from air tank. See "To Drain Tank" in the Maintenance section.

2.Set the On/Auto/Off lever to "Off" and unplug unit.

3.Using an adjustable wrench, loosen outlet tube nut at air tank and pump. Carefully move outlet tube away from check valve.

 

 

 

Nut

 

Outlet Tube

 

 

 

 

 

Pressure

 

 

 

 

Relief

 

 

 

 

 

Check

Tube

 

Valve

Nut

 

 

 

 

 

 

 

 

4.Using an adjustable wrench, loosen pressure relief tube nut at air tank and pressure switch. Carefully move pressure relief tube away from check valve.

5.Unscrew the check valve (turn counterclockwise) using a 7/8" open end wrench. Note the orientation for reassembly.

6.Using a screwdriver, carefully push the valve disc up and down. NOTE: The valve disc should move freely up and down on a spring which holds the valve disc in the closed position; if not the check valve needs to be cleaned or replaced.

Screwdriver

In open position nothing is visible.

In closed position disc is visible.

7.Clean or replace the check valve. A solvent, such as paint or varnish remover can be used to clean the check valve.

8.Apply sealant to the check valve threads. Reinstall the check valve (turn clockwise).

9.Replace the pressure release tube. Tighten nuts.

10.Replace the outlet tube and tighten nuts.

11.Perform the Break-in Procedure. See "Break-in Procedure" in the Operation section.

To Replace Regulator

1.Release all air pressure from air tank. See "To Drain Tank" in the Maintenance section.

2.Set the On/Auto/Off lever to "Off" and unplug unit.

3.Remove the outlet pressure gauge and quick connect (if equipped) from the regulator.

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Craftsman 919.167321 owner manual Service and Adjustments, To Replace or Clean Check Valve, To Replace Regulator
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919.167321 specifications

Craftsman 919.167321 is a powerful and versatile air compressor designed for both professional and DIY enthusiasts. This model boasts a host of features that make it an ideal choice for a wide range of applications in workshops, garages, and home improvement projects.

One of the standout features of the Craftsman 919.167321 is its robust 6-gallon tank, which allows for extended usage between refills. The horizontal design of the tank provides stability and makes it easier to store without taking up much space. With a maximum pressure of 150 PSI, this compressor delivers a strong and consistent airflow, making it suitable for inflating tires, powering pneumatic tools, and completing various home improvement tasks.

The motor of the Craftsman 919.167321 is designed to be incredibly efficient, ensuring quick recovery times and reduced noise levels. Operating at a decibel level that is quieter than many compressor models on the market, users can work comfortably without excessive noise pollution. The oil-free pump further enhances this convenience, requiring minimal maintenance while providing durability and longevity.

In terms of portability, the Craftsman 919.167321 features a sturdy handle and lightweight construction, allowing it to be moved easily from one job site to another. Its compact design makes it a perfect fit for those with limited space, whether in a home garage or professional workshop.

The compressor is also equipped with a set of quick couplers, which allow for easy connection to various pneumatic tools. This feature minimizes downtime during projects, enabling users to switch tools efficiently without hassle.

Safety is another priority with the Craftsman 919.167321. The unit includes a thermal overload protection feature that prevents the motor from overheating during extended use. Additionally, users will appreciate the built-in pressure gauge and regulator, which allow for precise control over the airflow and pressure settings.

Overall, the Craftsman 919.167321 air compressor stands out as a reliable option for anyone in need of a powerful, portable, and user-friendly compressor. With its efficient motor, quality construction, and practical features, it is designed to meet the diverse demands of various tasks while ensuring user satisfaction and safety. Whether you are inflating, nailing, or powering tools, the Craftsman 919.167321 is a smart addition to your toolkit.
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