3 HP TWIN TANK AIR COMPRESSOR 94734 ASSEMBLY AND OPERATING INSTRUCTIONS Due to continuing improvements, actual product may differ slightly from the product described herein. 3491 Mission Oaks Blvd., Camarillo, CA 93011 Visit our Web site at http://www.harborfreight.com Copyright© 2006 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.
Specifications ITEM DESCRIPTION Air Tank Size 13/4 HP (working), 3 HP (Peak), 1720 RPM; 120 V~, 60 Hz, 1 Phase, 11 A 5 gallons Pump Single stage Air Outlet Fitting Size 1/ Motor Power #233060 Pressure Switch inch NPT barbed 3.8 CFM at 90 PSI; 4.5 CFM at 70 PSI; and 5 CFM at 40 PSI On at 80 PSI; Off at 115 PSI Safety Valve Releases pressure at 120 PSI Net Weight 54.7 lbs.
ELECTRICAL SAFETY 1. Grounded compressors must be plugged into an outlet properly installed and grounded in accordance with all codes and ordinances. Never remove the grounding prong or modify the plug in any way. Do not use any adapter plugs. Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded. If the compressors should electrically malfunction or break down, grounding provides a low resistance path to carry electricity away from the user. 2.
TOOL USE AND CARE 1. Do not force the compressor. Use the correct compressor for your application. The correct compressor will do the job better and safer at the rate for which it is designed. Never attempt to force the compressor to provide more pressure than it was designed for. 2. Do not use the compressor if the Power Switch does not turn it on or turn it off. Any compressor that cannot be controlled with the Power Switch is dangerous and must be repaired or replaced. 3.
3. Use eye and ear protection. Always wear ANSI-approved safety impact eye goggles, and ear plugs when using the Air Compressor. 4. Make sure all tools and equipment used with the Air Compressor are rated to the appropriate air pressure capacity of the Air Compressor. Do not use any tool or equipment that does not operate from 0-120 PSI. If necessary, check the owner’s manual of the tool or equipment for its air pressure rating. 5.
17. Performance of this Air Compressor may vary depending on variations in local line voltage. 18. Maintain labels and nameplates on the Air Compressor. These carry important information. If unreadable or missing, contact Harbor Freight Tools for a replacement. 19. WARNING! People with pacemakers should consult their physician(s) before using this product. Electromagnetic fields in close proximity to a heart pacemaker could cause interference to or failure of the pacemaker. 20.
UNPACKING When unpacking, check to make sure all the parts shown on the Parts List at the end of the manual 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. Setup Dipstick Warning: Fill compressor with oil before using; running with NO OIL or with LOW OIL will void the warranty. The optimal capacity of the oil reservoir is 7.8 ounces of oil. The Dipstick is used to determine if oil is needed.
Operation Caution: Prior to use, inspect the compressor for any damaged parts or unsafe conditions. 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 an electrical grounded 115 Volt AC electrical receptacle. 6.
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. 3. Drain the air tanks after each use by opening the drain petcock or the Tank Drain Valve (A-7). Leave open until the next use. 4. After the compressor has cooled down, clean it with a damp rag containing mild detergent and water.
NOTE: The Air Compressor is equipped with an external overload device. Should the Air Compressor experience a short or excessive load, the overload device will trip and the machine will automatically shut down. If this happens, turn Off the Power Switch (A5), wait 10 minutes and check for any obvious problems. Reset the Overload Protection Button (41) then, turn On the Power Switch to restart the Air Compressor. See Drawing “A” below.
Parts List “B” Item Description Qty Item Description Qty B-1 Screw 1 B-22 Connecting Rod 1 B-2 Screw 1 B-23 Crankshaft 1 B-3 Washer 1 B-24 Gasket, Front Cover 1 B-4 Washer 1 B-25 Front Cover 1 B-5 Air Fliter 1 B-26 Washer 1 B-6 Cylinder Case 1 B-27 Washer 1 B-7 Gasket, Crankshaft Cover 1 B-28 Bolt - Oil Drain 1 B-8 Valve Seat 1 B-29 Screw 1 B-9 Gasket, Valve Seat 1 B-30 Crankshaft Case 1 B-10 Valve Plate 1 B-31 Nut 1 B-11 Valve Seat 1 B-3
Assembly Drawing “B” 41 34A 34B NOTE: When ordering parts on this page, add the prefix “B” to the part number (Example: B-1 is a Screw) NOTE: Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts REV 02/07 SKU 94734 For technical questions, please call 1-800-444-3353.
Troubleshooting Guide REV 02/07 SKU 94734 For technical questions, please call 1-800-444-3353.
Troubleshooting Guide Continued Symptom Circuit breaker (overload protection device) trips repeatedly, Cause Unit is being used with an extension cord Low voltage at receptacle. Excessive moisture at air outlet. Water in tank Solution Do not use an extension cord with this product. Check voltage at receptacle. Drain water from tank WARRANTY LIMITED 1 YEAR/ 90 DAY WARRANTY Harbor Freight Tools Co.
