Harbor Freight Tools Gas Powered Two-Stage Air Compressor 67853 User Manual

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

Item 67853

9. When the Gas Engine is started and running, the

compressor Pump starts compressing air into the Air Tank.

Open the in-line Shutoff Valve and adjust the Pressure

Regulator (sold separately) so that the air output is enough

to properly power the tool, but the output will not exceed

the tool’s maximum air pressure at any time. Turn the knob

clockwise to increase the pressure and counterclockwise

to decrease pressure. Adjust the pressure gradually, while

checking the air output gauge to set the pressure.

IMPORTANT: Allow the engine to run for five minutes with no load after each start-up so that the engine can stabilize.

Maintenance break-in Period:
Breaking-in the engine will help to ensure proper equipment and engine operation. The

maintenance break-in period

will last about 20 hours of use. After this period, change the engine oil.
Under normal operating conditions, subsequent maintenance follows the schedule explained in the MAINTENANCE

AND SERVICING section.

Note: When maximum tank pressure is reached, the compressor automatically disengages, and the engine RPM drops

down to idle speed. The engine remains at idle until Air Tank pressure falls to a preset level. The Gas Engine will then

accelerate and air pressure once again begins to build up in the Air Tank.
Note: As long as the engine is running, the operation of the Air Compressor is automatic, controlled by an internal

pressure switch.
IMPORTANT: The internal pressure switch is not user adjustable; do not make changes to the air pressure settings of

the internal pressure switch. Any change to the automatic pressure levels may cause excess pressure to accumulate,

causing a hazardous situation.
Note: Depressurization - If it is necessary to quickly depressurize the Compressor, turn OFF the engine. Then, pull on

the ring on the tank Safety Valve to release stored air pressure.

10. Use the air tool as needed.

11. After the job is complete, turn OFF the engine.

To stop the engine in an emergency, turn the Engine Switch off.

Under normal conditions, use the following procedure:
a. Turn the Engine Switch off.
b. Close the Fuel Valve.

OFF

START