Central Pneumatic Air Compressor 94734 User's Manual
Contents
1. 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 Air Flow Valve A 8 is to the right or left the valve is closed When it is in the middle it is open 2 Turn the Air Flow Valve to the appropriate pressure REV 07b SKU 94734 For technical questions please call 1 800 444 3353 Page 8 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 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 Do not use flammable liquids or solvents PARTS LIST A item Description ay Note Some parts are listed and shown for illustration purposes only and2. that its products meet high quality and durability standards and warrants to the original purchaser that for a period of one year from date of purchase that the tank is free of defects in materials and workman ship 90 days if used by a professional contractor or if used as rental equipment Harbor Freight Tools also warrants to the original purchaser for a period of ninety days from date of purchase that all other parts and components of the product are free from defects in materials and workmanship This warranty does not apply to damage due directly or indi rectly to misuse abuse negligence or accidents repairs or alterations outside our facilities normal wear and tear or to lack of maintenance We shall in no event be liable for death injuries to persons or property or for incidental contingent special or consequential dam ages arising from the use of our product Some states do not allow the exclusion or limita tion of incidental or consequential damages so the above limitation of exclusion may not apply to you THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS To take advantage of this warranty the product or part must be returned to us with transportation charges prepaid Proof of purchase date and an explanation of the complaint must accompany the merchandise If our inspection verifies the defect we will either repair or replace the product
3. 20 PSI If necessary check the owner s manual of the tool or equipment for its air pressure rating Always disconnect the Air Compressor from its electrical outlet release any remaining air pressure from the unit and disconnect all pneumatic tools and equipment from the unit before performing any services or maintenance or when not in use Avoid injury Never direct the air jet at people or animals Inspect safety valve daily If the safety valve is not working properly tank pressure can build up to dangerous levels The tank could explode For this reason pull the ring on the safety valve before each use and verify that it operates freely Replace safety valve if it does not operate freely Never remove or alter the factory sealed Safety Release Valve Do not attempt to readjust the automatic start and shutoff valves Any change to the automatic ON OFF pressure levels will cause additional stress on the motor which may result in shortened motor life Drain the Air Compressor s air tank every day Do not allow moisture to build up inside the Air Tank Do not unscrew the tank drain valve so that more than four threads are show ing Avoid risk of tank explosion a Avoid weakening of tank by draining condensation after each use b Never modify tank by drilling holes welding to it or modifying it s parts c The tank is designed and factory set to operate within a specific pressure range For that reason never make a
4. CENTRAL PNEUMATIC lt 3 HP TWIN TANK AIR COMPRESSOR 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 may not be drawn proportionally Due to continuing improvements actual product may differ slightly from the product described herein Tools required for assembly and service may not be included For technical questions or replacement parts please call 1 800 444 3353 Revised Manual 10d SPECIFICATIONS Moor Power EAM wong 3 HP Pea 1720 RPM N Air Tank Size Air Tank Size Size 5 gallons ae 3 8 CFM at 90 PSI 4 5 CFM at 70 PSI and AF DEINE 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 assembly oper ating inspection maintenance and cleaning procedures parts list and assembly diagram Keep your invoice with this manual Write the invoice number on the inside of the front cover Keep this manual and i
5. are not available individually as replacement parts PLEASE READ THE FOLLOWING CAREFULLY THE MANUFACTURER AND OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY NEITHER THE MANUFACTURER NOR DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT IN FACT THE MANUFACTURER AND OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT BY THE BUYER THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO REV 10d SKU 94734 For technical questions please call 1 800 444 3353 Page 9 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 ASSEMBLY DRAWING A A2 41 Overload Protection Button A6 A7 under the tank REV 07b 10d SKU 94734 F
6. at our election or we may elect to refund the purchase price if we cannot readily and quickly provide you with a replacement We will return repaired prod ucts at our expense but if we determine there is no defect or that the defect resulted from causes not within the scope of our warranty then you must bear the cost of returning the product This warranty gives you specific legal rights and you may also have other rights which vary from state to state 3491 Mission Oaks Blvd PO Box 6009 Camarillo CA 93011 800 444 3353 REV 07b SKU 94734 For technical questions please call 1 800 444 3353 Page 14
7. djustments to or substitute parts to the compres sor Avoid bodily injury from moving parts The compressor cycles on automatically without notice For this reason always keep hands and arms away from compressor parts when the unit is connected to electrical power Always have compressor safety guards in place before turning compressor on Use approved air hose Never use plastic or PVC pipe unless specified for Air Compressors to carry air under pressure Regardless of its pressure rating it can burst under pressure Never plug the power cord of this product into an electrical outlet while stand ing on a wet or damp surface REV 07b SKU 94734 For technical questions please call 1 800 444 3353 Page 5 20 21 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 Always turn off the Air Compressor in the event of a power failure Performance of this Air Compressor may vary depending on variations in local line voltage Maintain labels and nameplates on the Air Compressor These carry important information If unreadable or missing contact Harbor Freight Tools for a replace ment AWARNING 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 AWARNING The b
8. e TOOL USE AND CARE Do not force the compressor Use the correct compressor for your applica tion The correct compressor will do the job better and safer at the rate for which it SKU 94734 For technical questions please call 1 800 444 3353 Page 3 is designed Never attempt to force the compressor to provide more pressure than it was designed for 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 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 starting the compressor accidentally Keep idle compressors out of reach of children and other untrained persons Compressors are dangerous in the hands of untrained users Maintain compressors with care Keep all components of this product clean and dry Do not use a damaged compressor Tag damaged compressors Do not use until repaired Check for misalignment or binding of moving parts breakage of parts and any other condition that may affect the compressor s operation If damaged have the compressor serviced before using Many accidents are caused by poorly maintained compressors Use only accessories that are recommended by the manufacturer for your model Accessories that may be suitable for one compr
9. essor may become hazard ous when used on another compressor SERVICE Compressor service must be performed only by qualified repair personnel Service or maintenance performed by unqualified personnel could result in a risk of injury When servicing a compressor use only identical replacement parts Follow instructions in the Inspection Maintenance And Cleaning section of this manual Use of unauthorized parts or failure to follow maintenance instructions may create a risk of electric shock or injury SPECIFIC SAFETY RULES CAUTION Prior to its first use and thereafter prior to each subsequent use make sure to fill the Air Compressor with a premium quality 30 weight non detergent compressor oil to the specified level Running the Air Compressor with no oil or with low oil will cause damage to the equipment and void its warranty Refer to the Setup instructions on page 7 for details on filling the Air Compressor with oil When filling the Air Compressor with oil make sure to unscrew do not pull the Oil Fill Cap to remove SKU 94734 For technical questions please call 1 800 444 3353 Page 4 Use eye and ear protection Always wear ANSI approved safety impact eye gog gles and ear plugs when using the Air Compressor 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 1
10. l 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 somewhere between the two lines as high as possible 3 Add oil through the Dipstick s hole as necessary but do not overfill Always use a high grade oil specially designed for air compressors Never mix oils of different types Never use a low quality oil which may not afford adequate lubrication 4 Replace the Dipstick Install an Air Intake Filter and Hose not included The filter and oiler not supplied are recommended but not mandatory for operation 1 Remove and discard the plastic cap which covers the threaded hole at the top of the Cylinder Case B 6 2 Screw the threaded part of the air filter assembly into the Cylinder Case until it is firmly seated 3 Connect the air tool air hoses filter and oiler to the Compressor Air Output as illustrated on the next page If the filter and oiler are not used connect the air hose directly to the 1 4 inch NPT barbed connector located at the Air Flow Valve A 8 For easy connection or removal a quick coupler should be installed on the end of the air output Quick Quick Quick Oiler _ Filter Connecter Coupler Connector F Z E Air Air at Pa amt y Too a on Sa aa ime wa tte ae Compressor b iS na Quick Regulator Coupler Air Hose Note Use pi
11. nvoice in a safe and dry place for future reference GENERAL SAFETY RULES AWARNING READ AND UNDERSTAND ALL INSTRUCTIONS Failure to follow all instructions listed below may result in electric shock fire and or serious injury SAVE THESE INSTRUCTIONS WORK AREA 1 Keep your work area clean and well lit Cluttered benches and dark areas invite accidents 2 Do not operate compressors in explosive atmospheres such as in the pres ence of flammable liquids gases or dust Compressors create sparks which may ignite the dust or fumes 3 Keep bystanders children and visitors away while operating a compressor Provide barriers or shields as needed REV 07b SKU 94734 For technical questions please call 1 800 444 3353 Page 2 ELECTRICAL SAFETY 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 Do not expose compressors to rain or wet conditions Water entering an elec tric motor will increase the risk of electric shock Do not abuse the Power Cord Never use the Power Cord to pull the Plug from an outlet Keep
12. or technical questions please call 1 800 444 3353 Page 10 PARTS LIST B Item Description Qty B 6 CylinderCase Tt B 9 Gasket ValveSeat_ 1 SKU 94734 For technical questions please call 1 800 444 3353 Item Description Qty REV 07b Page 11 ASSEMBLY DRAWING B 41 34A 30 343233 363637398 38 40 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 TROUBLESHOOTING GUIDE Symptom The unit has reached its automatic shutoff pressure of 115 psi below 80 psi Air tank pressure is above Cac ees 80 psi The pressure switch is Off Turn pressure switch On Unit will not operate The air compressor circuit Check for any obvious breaker overload protective problems wait 10 minutes device tripped then reset No electrical power at Check for electrical power receptacle at receptacle Defective pressure switch Replies eee by using a qualified electrician Low voltage at receptacle el volans alatoeplagle using a voltmeter Do not use an extension cord with this air compressor run l Replace component by Defective motor capacitor ae using a qualified electrician Replace component b Defective motor P Pa
13. pe thread seal tape on all threaded connections SKU 94734 For technical questions please call 1 800 444 3353 Page 7 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 Verify Tank Drain Valve A 7 is closed Verify oil level is correct Verify that the Safety Valve A 4 is operational Turn the Air Flow Valve A 8 to the OFF position Plug the power cord into an electrical grounded 115 Volt AC electrical receptacle 9 Q1 ees Rotate the Power Switch A 5 to the Vertical position to turn the air compressor on Rotate that same switch to the horizontal position to turn it off See page 10 Note Allow the pressure to build up to at least 80 PSI before using air Note Motor will not start if tank pressure is already between 80 115 PSI Pressure MUST be below 80 PSI for motor to restart and build up pressure to the 115 PSI cut off pressure 7 Open the Air Flow Valve A 8 and check for air leaks The operation of the compressor is automatic as controlled by the 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 will 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
14. rass components of this product contain lead a chemical known to the State of California to cause birth defects or other reproductive harm California Health amp Safety code 25249 5 et seq AWARNING The warnings precautions and instructions discussed in this in struction manual cannot cover all possible conditions and situations that may occur It must be understood by the operator that common sense and caution are factors which cannot be built into this product but must be supplied by the operator SAVE THESE INSTRUCTIONS 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 IMPORTANT This compressor is shipped with the oil fill plug removed and without oil The oil fill plug is attached to the power cord as a reminder to add oil to the crank case Add oil to the proper level as explained on the next page and secure the oil fill plug before use REV 07i SKU 94734 For technical questions please call 1 800 444 3353 Page 6 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 oi
15. the Power Cord away from heat oil sharp edges or moving parts Replace damaged Power Cords immediately Damaged Power Cords increase the risk of electric shock AN EXTENSION CORD MUST NEVER BE USED WITH THIS ITEM Connecting this item to an outlet through an extension cord MAY CAUSE ELECTRICAL DAMAGE TO THE MOTOR and could present a FIRE HAZARD Always unplug the air compressor and release the air pressure when not in use PERSONAL SAFETY Stay alert Watch what you are doing and use common sense during use Do not use while tired or under the influence of drugs alcohol or medication A moment of inattention while operating may result in serious personal injury Dress properly Do not wear loose clothing or jewelry Contain long hair Keep your hair clothing and gloves away from moving parts Loose clothes jewelry or long hair can be caught in moving parts Avoid accidental starting Be sure the Power Switch is turned off before plug ging in Plugging in compressors with the Power Switch on invites accidents Remove adjusting keys or wrenches before turning the compressor on A wrench or a key that is left attached to a rotating part of the compressor may result in personal injury Do not overreach Keep proper footing and balance at all times Use safety equipment Always wear eye protection Make sure you are wearing your protective clothing safety glasses with side shields and dust mask or air respi rator if appropriat
16. using a qualified electrician Do not use an extension cord with this air compressor Check for proper fuse size Use time delay fuse Use air compressor on a dedicated branch circuit with no other appliances connected no oil in crank case using a qualified electrician Rattle noise or excessive vibration Exceeding unit CFM Unit Reduce air usage Ensure itoa small forair tool air tool rated CFM is within air compressor rated CFM Check tank for air leakage with soap and water Low air discharge pressure Tank leakage solution If air leakage is detected tank replacement To restart release pressure Unit is being used with an Motor hums but does not extension cord Unit is being used with an extension cord Branch circuit fuse trips Branch circuit fuse size is repeatedly incorrect is required Replace valves DANGER Broken valves Ensure no air is in tank prior to removal REV 07b SKU 94734 For technical questions please call 1 800 444 3353 Page 13 __________ TROUBLESHOOTING GUIDE conTINUED _ Symptom Circuit breaker overload Unit is being used with an Solution o 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
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