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3 HP TWIN TANK AIR
COMPRESSOR
Model 94734
SET uP ANd OPERATINg INSTRuCTIONS
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANuAl.
© ®
Copyright 2006 by Harbor Freight Tools . All rights reserved. No portion of this manual or any artwork con-
tained herein may be reproduced in any shape or form without the express written consent of Harbor Freight
Tools. Diagrams within this manual m
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SPECIFICATIONS 3 1 / HP (working), 3 HP (Peak), 1720 RPM; 4 Motor Power 120 V~, 60 Hz, 1 Phase, 11 A Air Tank Size 5 gallons Pump Single stage #233060 1 Air Outlet Fitting Size / inch NPT barbed 4 3.8 CFM at 90 PSI; 4.5 CFM at 70 PSI; and Air Delivery 5 CFM at 40 PSI Pressure Switch On at 80 PSI; Off at 115 PSI Safety Valve Releases pressure at 120 PSI Pressure gauge, Overload reset button, Features Auto shutoff SAVE THIS MANuAl You will need this manual for the safety warnings and precautions,
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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 us
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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. disconnect the Power Cord Plug from the power source before making any ad- justments, changing accessories, or storing the compressor. Such preventive safety measures reduce the risk of startin
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3. use eye and ear protection. Always wear ANSI-approved safety impact eye gog- gles, 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. Always disconnect the Air Compressor from its electrical
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15. THIS AIR COMPRESSOR MAY REquIRE A dEdICATEd ElECTRICAl CIRCuIT AS THE AMPERAgE dRAW uNdER Full lOAd, COMbINEd WITH uSE OF ANY OTHER ITEM, MAY OVERlOAd YOuR CIRCuIT. 16. Always turn off the Air Compressor in the event of a power failure. 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 repl
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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. Never operate the compressor with- out sufficient oil. Use a 30 weight, non-detergent compressor oil. To check the oil: 1. Unscrew the Dipstick. 2. Check the level of the oil. There are two lines on the bottom of the Dipstick. The oil level should be
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OPERATION CAuTION! Prior to use, inspect the compressor for any damaged parts or unsafe con- ditions. 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. Rotate the Power Switch (A-5) to the Vertical position
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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
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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. ASSEMbl Y dRAWINg “A” A2 A3 A5 A9 A14 (41) Overload Pr
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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-32 Seal Washer 1 B-12 Gasket, Valve Seat 1 B-33 Bearing 1 B
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ASSEMbl Y dRAWINg “b” 34A 41 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 07b SKU 94734 For technical questions, please call 1-800-444-3353. Page 12
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TROublESHOOTINg guIdE REV 07b SKU 94734 For technical questions, please call 1-800-444-3353. Page 13
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TROublESHOOTINg guIdE (CONTINuEd) Symptom Cause Solution Circuit breaker (overload Unit is being used with an Do not use an extension cord with protection device) trips repeatedly extension cord this product. Low voltage at receptacle. Check voltage at receptacle. Excessive moisture at air outlet. Water in tank Drain water from tank lIMITEd 1 YEAR / 90 dAY WARRANTY Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants t
