Troubleshooting

Guide

_The

air compressor should be turned off and unplugged from the power source before any maintenance

 

is performed as welt as the air bled from the tank and the unit allowed time to cool Personal injuries

could occur from moving parts, electrical sources, compressed air, or hot surfaces.

PROBLEM

Air leaks at the check valve or at the pressure relief vaive,

Air leaks between head and cylinder.

Air leak from safety valve.

Pressure reading on the regulated pressure gauge drops when an accessory is used.

POSSIBLE CORRECTION

A defective check valve results in a constant air leak at the pressure relief valve when there is pressure in the tank and the compressor is shut off. Drain the tank, then remove and clean or replace the check valve.

Be sure of proper torque on head bolts, if leak remains, contact a service technician.

Operate the safety valve manually by pulling on the ring. If the valve continues to leak when in the closed position, it should be replaced.

If there is an excessive amount of pressure drop when the accessory is used, replace the regulator.

NOTE:

Adjust the regulated pressure under flow conditions (while accessory is being used), It is normal for the gauge to show minimal pressure loss during initial use of the tool.

Excessive

tank pressure.

Move the

Auto-On/Off lever to the

Off position.

It the

unit doesn't

shut

off, unplug

it

 

 

from the power source and contact a service technician.

 

 

 

 

Motor will

not start.

Make sure power cord is plugged

in and

the switch

is on. Inspect

for

the proper

size

 

 

fuse in your circuit box. If the fuse was tripped, reset it and restart the unit. If

 

 

 

repeated tripping occurs, replace the check valve or contact a service technician

 

Excessive

moisture in the

Remove

the

water

in the

tank by

draining

after

each

use. High

humidity

 

discharge

air.

environments

will

cause

excessive

condensation.

Utilize water

filters

on your air

 

 

 

line.

 

 

 

 

 

 

 

 

 

 

 

 

NOTE:

Water condensation is not caused by compressor malfunction. Be sure the compressor'sair output is greater than your tool'eair consumption rate.

Air leaks from the tank body or tank welds.

Never ddfl into, weld or otherwise rupture or explode. Compressor compressor.

modify the air tank or it will weaken. The tank can cannot be repaired. Discontinue use of the air

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Craftsman 921.166390 owner manual Troubleshooting Guide, Problem
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921.166390 specifications

The Craftsman 921.166390 is a versatile and durable tool that has garnered attention for its reliability and innovative features. Designed for both professionals and DIY enthusiasts, this multipurpose tool stands out in the competitive market of power tools.

One of the main features of the Craftsman 921.166390 is its powerful motor, which provides robust performance for a variety of applications. With its efficient power output, users can tackle tasks ranging from cutting and shaping materials to drilling holes and fastening components. This makes it an ideal choice for woodworking, metalworking, and home improvement projects.

The tool is equipped with an adjustable speed setting, allowing users to customize the speed according to the task at hand. This feature is particularly beneficial when working with different materials, as it helps prevent damage and ensures precision. The variable speed control gives users the flexibility to optimize performance, whether they are working with delicate materials or require high-speed cutting.

Another significant characteristic of the Craftsman 921.166390 is its ergonomic design. The tool is crafted to fit comfortably in the user’s hand, reducing fatigue during extended use. The non-slip grip promotes stability, enabling users to maintain control even in challenging working conditions. This thoughtful design is crucial for achieving accuracy while minimizing the risk of accidents.

In terms of construction, the Craftsman 921.166390 is built with high-quality materials that enhance durability and longevity. The robust housing protects the internal components from damage, ensuring the tool can withstand the rigors of daily use. Additionally, the easy-to-replace parts contribute to its maintenance, allowing users to keep the tool in optimal working condition for years to come.

The versatility of the Craftsman 921.166390 is further enhanced by its compatibility with various attachments and accessories. This allows for a wide range of applications, making it a multi-functional tool that can adapt to different tasks. Whether users need to drill, cut, or shape materials, this tool can handle it all, making it a valuable addition to any toolkit.

In summary, the Craftsman 921.166390 is characterized by its powerful motor, adjustable speed settings, ergonomic design, and robust construction. These features combine to create a reliable tool that meets the demands of various applications, making it a preferred choice among both professionals and hobbyists alike. Its ability to perform a multitude of tasks efficiently ensures that users can take on projects with confidence.
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