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140 PSI twIn cylInder
aIr comPreSSor PumP
for 3 HP motor
model 93785
Set uP and oPeratIng InStructIonS
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read this material before using this product.
failure to do so can result in serious injury.
SaVe tHIS manual.
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Copyright 2009 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.
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aSSembly dIagram ................ 18 contentS lImIted 90 day warranty .... 19 ImPortant Safety InformatIon ............................ 3 general Safety w arnIngS .......3 comPreSSor PumP Safety warnIngS ......................................4 aIr comPreSSor Safety warnIngS ......................................5 groundIng (for motor) ........ 7 Symbology .....................................7 SPecIfIcatIonS .......................... 8 unP ackIng .................................. 8 InStruct
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not avoided, could result in SaVe tHIS manual minor or moderate injury. Keep this manual for the safety notIce is used to warnings and precautions, assembly, address practices operating, inspection, maintenance and not related to personal injury. cleaning procedures. Write the product’s serial number in the back of the manual cautIon, without near the assembly diagram (or month the safety alert and year of purchase if product has no symbol, is used to address number). Keep this
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while operating a compressor pump and changing accessories. keep may result in serious personal injury. the outside surfaces dry, clean and free from oil and grease. check for b. use personal protective misalignment or binding of moving equipment. always wear eye parts, breakage of parts and any protection. Safety equipment such other condition that may affect the as a dust mask, non-skid safety compressor pump’s operation. If shoes, hard hat, or hearing protection damaged, have t
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5. misalignment between motor air compressor Safety w arnings and Pump can damage the belt 1. Risk of fire or explosion - Do not wheel. Use a straight edge, such spray flammable liquid in a confined as a yardstick, to check and adjust area or towards a hot surface. Spray alignment as needed. area must be well-ventilated. Do not 6. use proper size motor and motor smoke while spraying or spray where pulley. This air compressor Pump spark or flame is present. Arcing must be installed w
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the manufacturer may result in a risk unreadable or missing, contact of injury to persons. Harbor Freight Tools for a replacement. 13. All air line components, including hoses, pipe, connectors, filters, etc., 17. This product is not a toy. Keep it out must be rated for a minimum working of reach of children. pressure of 150% of the maximum 18. Operate unit on level surface. Check system pressure. oil level daily and fill to marked level if 14. USE OF AN EXTENSION CORD needed. IS NOT RECO
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product, but must be supplied by the operator. SaVe tHeSe InStructIonS. groundIng (for motor) t o PreVent electrIc SHock and deatH from Incorrect groundIng wIre connectIon: Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded. do not modify the power cord plug provided with the motor. never remove the grounding prong from the plug. do not use the motor if the power cord or plug is damaged. If damaged, have it repaired by a s
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any adjustments to the motor, SPecIfIcatIonS tank, and/or compressor pump. Single Stage Twin Compressor Type Cylinder note: For additional information regarding Maximum Air 140 PSI the parts listed in the following pages, Pressure refer to the Assembly Diagram near Maximum Speed 1200 RPM the end of this manual. 10 SCFM @ 40 PSI Air Delivery 8 SCFM @ 90 PSI (@ 1050 RPM) 7.4 SCFM @ 115 PSI functions SAE 30W non-detergent Air Compressor Oil Oil Type Cylinder (Sold separately) Head (SKU 95
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hazard or exposing the power cord to cautIon: Avoid damage to the Air possible damage. Compressor Pump and other equipment. Make sure the mounting surface on which the Air Compressor assembly Pump is installed is flat, level and 1. Make sure that the inner faces of strong enough to support the pump, the wheel socket as well as the motor and tank. Crankshaft (29) are clean and free of 1. Place the Air Compressor Pump on the burrs and roughness. mounting surface at the same level as 2
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10. Mount the motor (not supplied) 10.25 x 1050 6.24” = as recommended by the motor 1725 manufacturer. Be sure that the motor Or, use the following equation if you is securely mounted. have a 3450 RPM motor: 11. Make final alignment and adjust 10.25 x 1050 3.12” = belt tension with the motor. It may 3450 be necessary to loosen the motor 2. The 10-1/4 inch V-groove Belt Wheel mounting bolts to adjust the motor (35) of the Air Compressor Pump location. To test the proper tension must be
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contractor for semi-automatic control checking the oil of air pressure in the vessel. Check the oil level before operation. warnIng! Avoid serious injuries. Do not Fill the Pump Crankcase with air SAE operate this Air Compressor Pump 30W non-detergent compressor oil without a pulley guard in place. (sold separately). ImPortant : running the air coupler coupler Plug Plug compressor Pump with no oil or t ool low oil will cause damage to the equipment and void the warranty. Quick air H
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note: SAE 30W non-detergent Air 8. Open the in-line Shutoff Valve. Compressor Oil (sold separately) is 9. Turn the Power Switch ON. recommended for use with this pump. 10. Allow the Air Compressor to build up If uncertain which oil to use, please pressure until it cycles off. call Harbor Freight Tools customer service at 1-800-444-3353 for 11. Check that the V-belt does not vibrate assistance. and listen for abnormal noise, air leaks or vibration. change the compressor oil after the fi
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13. Adjust the Air Compressor’s Pressure maIntenance and Regulator so that the air output is Ser VIcIng enough to properly power the tool, but the output will not exceed the Procedures not specifically tool’s maximum air pressure at any explained in this manual time. Turn the knob clockwise to must be performed only by a increase the pressure and counter- qualified technician. clockwise to decrease pressure. Adjust the pressure gradually, while t o PreVent SerIouS Injury checkin
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maintenance Schedule oil maintenance Following are general guidelines for Check the oil periodically for clarity. maintenance checks of the unit. Replace oil if it appears milky or if debris is present, or every 6 months, note: The working environment and or 100 hours of runtime, whichever frequency of use can affect how often comes first. In harsh environments you will need to check components such as high heat or high humidity, and perform maintenance you will need to replace the oil
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note: Do not open the Drain Valve so that more than four threads are showing. To empty the air and condensation: a. Make sure the Power switch of the compressor is off. b. Place a collection pan under the Drain Valve. c. Unthread the Drain Valve two or three turns ONLY. d. When all the pressure and moisture is released, close the Drain Valve. air filter maintenance Check the Air Filter weekly to see if it needs replacement. If working in dirty environments, you may need to replace the fi
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t roubleshooting Problem Possible causes likely Solutions Compressor does 1. Incorrect power supply. 1. Check that circuit matches compressor requirements. not start or restart 2. No power at outlet. 2. Reset circuit breaker, or have outlet serviced by a qualified technician. 3. Power cord not plugged in 3. Check that cord is plugged in securely. properly. 4. Thermal overload switch 4. Turn off Tool. Turn off Compressor and wait for it to tripped. cool down. Press reset button. Resume operati
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Problem Possible causes likely Solutions Overheating 1. Filters need cleaning/replacing. 1. Check inlet and outlet filters. Clean and/or replace as needed. 2. Crankcase oil too thin or 2. Drain oil and refill to proper level with recommended incorrect type. oil. 3. Crankcase oil level too low. 3. Add oil to proper level, check for leaks. 4. Unusually dusty environment. 4. Clean and/or replace filters more often or move unit to cleaner environment. 5. Cord is too small of a gauge or 5. Increas
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PleaSe read tHe followIng carefully THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR 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 REPLACEM
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aSSembly dIagram record Product’s Serial number Here: note: If product has no serial number, record month and year of purchase instead. note: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts. REV 09j SKU 93785 for technical questions, please call 1-800-444-3353. Page 19
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lImIted 90 day warranty Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this product is free from defects in materials and workmanship for the period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper installati
