Harbor Freight Tools 42321 manual Operation, Maintenance, Turning Compressor On

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Operation

Caution: Prior to use, inspect the compressor or any damaged parts or unsafe condi- tions. Make any necessary repairs before using again.

Turning Compressor On

1.Verify Tank Drain Valve (A-7) is closed.

2.Verify oil level is correct.

3.Verify that the Safety Valve (A-4) is operational.

4.Turn the Air Flow Valve (A-8) to the OFF position.

5.Plug the power cord into a electrical outlet with a grounding prong.

6.Turn the ON/OFF Switch Lever(A-5) down to turn on. Turn the Switch Lever up to shut off.Allow the pressure to build up to at least 80 PSI before using air.

7.Open the Air Flow Valve (A-8) and check for air leaks.

The operation of the compressor is automatic, as controlled by the an internal pressure switch. When the pressure drops below its operating range the compressor turns on. When the pressure is above 115 PSI, the compressor shuts off.

Warning; The compressor may become very hot during operation. Do not touch the cylinder area of the compressor, or allow flammable materials to come in contact with the cylinder area.

Adjusting Pressure Gauge and Pressure Adjustment Screw

Caution: The Pressure Switch is adjustable but changes to the pressure levels are not recommended; any change to the automatic ON/OFF pressure levels will cause addi- tional stress on the motor which may shorten motor life.

Adjusting Air Output

1.When the Lever of the Air Flow Valve (A-8) is to the up or down position, the valve is closed. When it is in the middle, it is open.

2.Turn the Air Flow Valve to the appropriate pressure.

Maintenance

Warning: Do not make any repairs, adjustments, or maintenance on the air compressor unless it is disconnected from the electrical power and the tank pressure is released.

Maintenance should always be performed by a qualified technician.

1.Check the oil level before each use. If the oil is low, add some. If it is high, drain some by removing the Drain Plug. Replace the oil once a year.

2.Check and clean the Air Filter (B-5) every 50 hours, or sooner if used in a dusty

environment.

REV 02/04

SKU 42321

For technical questions, please call 1-800-444-3353.

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Contents Page Page Work Area Tool USE and Care SKU For technical questions, please callPage SKU For technical questions, please call Dipstick SetupInstall an Air Intake Filter and Hose not included Turning Compressor On MaintenanceOperation Parts List a Item # Description QtyPage Parts List B Description QtyAssembly Drawing B