® 21 GALLON, 230 VAC, CAST IRON VERTICAL AIR COMPRESSOR 93271 OPERATING INSTRUCTIONS ® 3491 Mission Oaks Blvd., Camarillo, CA 93011 Visit our Web site at http://www.harborfreight.com Copyright© 2005 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools. For technical questions, please call 1-800-444-3353.
SPECIFICATIONS Item Maximum Air Pressure Air Tank Capacity Air Flow Capacity Electrical Requirements Pump Stage Air Outlet Size Shipping Weight Power Cord Description 115 PSI with Auto Shut-Off 21 Gallons 3.5 CFM at 90 PSI 8.
6. DRESS SAFELY. Do not wear loose clothing or jewelry, as they can become caught in moving parts. Wear a protective hair covering to prevent long hair from becoming caught in moving parts. If wearing a long-sleeve shirt, roll sleeves up above elbows. 7. DO NOT OVERREACH. Keep proper footing and balance at all times to prevent tripping, falling, back injury, etcetera. 8. INDUSTRIAL APPLICATIONS MUST FOLLOW OSHA REQUIREMENTS. 9. STAY ALERT. Watch what you are doing at all times. Use common sense.
SPECIFIC PRODUCT WARNINGS AND PRECAUTIONS 1. CAUTION: Make sure to fill the Air Compressor with a premium quality, 30-weight, non-detergent oil before each use. Running the Air Compressor with no oil or low oil will cause damage to the equipment. Note: The oil reservoir has an optimal capacity of 30 ounces of oil. 2. MAKE SURE ALL TOOLS AND EQUIPMENT USED WITH THE AIR COMPRESSOR ARE RATED TO THE APPROPRIATE CAPACITY.
UNPACKING When unpacking, check to make sure all the parts shown on the Parts Lists on pages 10, and 11 are included. If any parts are missing or broken, please call Harbor Freight Tools at the number shown on the cover of this manual as soon as possible. OPERATING INSTRUCTIONS NOTE: For additional references to the parts listed below, refer to the Assembly Diagrams on pages 10, and 11. To Check The Oil Level: 1. The Oil Window (20B) is used to determine if oil is needed.
2. Pull on the Pressure Relief Valve (5A) briefly to ensure that it does not stick. 3. Turn the Air Flow Valve (6A) to its “OFF” position. 3. Connect the air hose (not provided) to the Air Flow Valve (6A) of the Air Compressor. Then, connect the other end of the air hose to the pneumatic tool (not provided) that is to be used. 4.
sure Adjuster clockwise to increase the air output to the tool, up to the working air pressure (115 PSI) as indicated on the Tank Pressure Gauge (3A). Never exceed the maximum PSI for the tool being used or any component of the air system. 3. Turn the Tool Pressure Adjuster (2A) counterclockwise to decrease the air output to the tool. To Use The Tank Pressure Relief Valve: 1. The Tank Pressure Relief Valve Ring (5A) is used when decompression is needed quickly and efficiently.
INSPECTION, MAINTENANCE, AND CLEANING 1. WARNING: Always disconnect the Air Compressor from its electrical supply source before performing any inspection, maintenance, or cleaning. 2. BEFORE EACH USE, inspect the general condition of the Air Compressor. Check all air fittings for leaks. Check for loose screws, misalignment or binding of moving parts, cracked or broken parts, damaged power cord and plug, and any other condition that may affect the safe operation of this tool.
PARTS LIST A / ASSEMBLY DIAGRAM Part Description Qty. Part Description Qty.
PARTS LIST B / ASSEMBLY DIAGRAM B Part Description Qty. Part Description Qty.
