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®
COMPRESSOR
4 HP - 10 GALLON
Model 90234
OPERATING INSTRUCTIONS
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit our Web site at: http://www.harborfreight.com
®
Copyright 2003 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.
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PRODUCT SPECIFICATIONS In tem Descriptio 4 HP Peak / 3 HP Rated / 120 V / 60 Hz Electrical Requirements 3400 RPM; Two Capacitor Motor Thermal Overload Protection MI aximum PSI 115 PS 4.5 SCFM @ 115 PSI / 5.6 SCFM @ 90 PSI Air Deliveries 6.2 SCFM @ 70 PSI / 7.2 SCFM @ 40 PSI As ir Tank Capacity 10 Gallon Automatic Shut-Off Automatic Shut-Off @ 115 PSI Automatic Restart Automatic Restart @ 85 PSI Os il Capacity 25.35 Ounce As ir Outlet Size 1/4"-18 NPT Male Thread Ns et Weight 75.50 Pound SAVE THI
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2. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power tools create sparks which may ignite the dust or fumes. 3. Keep bystanders, children, and visitors away while operating a power tool. Distractions can cause you to lose control. Protect others in the work area from debris such as chips and sparks. Provide barriers or shields as needed. ELECTRICAL SAFETY 4. Grounded tools must be plugged into an outlet properly installed
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10. 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. 11. Avoid accidental starting. Be sure the Power Switch is off before plugging in. Carrying power tools with your finger on the Power Switch, or plugging in power tools with the Power Switch on, invites accidents. 12. Remove adjusting keys or wrenches before turning the power tool on. A
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the tool serviced before using. Many accidents are caused by poorly maintained tools. 21. Use only accessories that are recommended by the manufacturer for your model. Accessories that may be suitable for one tool may become hazardous when used on another tool. SERVICE 22. Tool service must be performed only by qualified repair personnel. Service or maintenance performed by unqualified personnel could result in a risk of injury. 23. When servicing a tool, use only identical replacement parts.
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3. Your tool must be plugged into an appropriate outlet, properly installed and grounded in accordance with all codes and ordinances. The plug and outlet should look like those in the following illustration. (See Figure A.) FIGURE A DOUBLE INSULATED TOOLS: TOOLS WITH TWO PRONG PLUGS 4. Tools marked “Double Insulated” do not require grounding. They have a special double insulation system which satisfies OSHA requirements and complies with the applicable standards of Underwriters Laboratories,
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SYMBOLOGY Double Insulated Canadian Standards Association Underwriters Laboratories, Inc. Volts Alternating Current V ~ Amperes A no No Load Revolutions xxxx/min. per Minute (RPM) SPECIFIC SAFETY RULES 1. Maintain a safe working environment. Keep the work area well lit. Make sure there is adequate surrounding workspace. Always keep the work area free of obstructions, grease, oil, trash, and other debris. Do not use this product in areas near flammable chemicals, dusts, and vapors. 2. Maintai
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8. When checking the oil level, make sure to unscrew (do not pull) the Oil Plug (part #78) out. 9. Drain the Air Compressor’s Tank (part #50) every day. Do not allow moisture to build up inside the Tank. Do not open the Tank Drain Valve (part #59) so that more than four threads are showing. 10. Avoid injury. Never direct the Air Outlet Valve (part #69) at people or animals. 11. Do not alter or remove the factory sealed Pressure Relief Valve (part #67). 12. Dress properly. Do not wear loose c
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22. WARNING! People with pacemakers should consult their physician(s) before using this product. Operation of electrical equipment in close proximity to a heart pacemaker could cause interference or failure of the pacemaker. 23. WARNING! The warnings, precautions, and instructions discussed in this manual cannot cover all possible conditions and situations that may occur. The operator must understand that common sense and caution are factors which cannot be built into this prod
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30-weight, non-detergent, compressor oil before each use. Running the Air Compressor with no oil or low oil will cause damage to the equipment and void the warranty. To check the level of oil, make sure the Air Compressor is OFF. Then, observe the Oil Level Window (part #72). The level of oil should just reach the horizontal line as shown on the Oil Level Window. If the level of oil is below the horizontal line, remove the Oil Plug (part #78) and add new oil through the Oil Plug hole. Ma
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3. Make sure the Tank Drain Valve (part #59) is closed. (See Figure F.) 4. Make sure the “On/Off” Pressure Switch (part #66) is DOWN in its OFF position. Then, plug the Power Cord (part #64) into the nearest 120 volt, grounded, electrical outlet. (See Figure F.) 5. Pull UP on the “On/Off” Pressure Switch (part #66) to its ON position. (See Figure F.) “ON/OFF” PRESSURE SWITCH (#66) PRESSURE REGULATOR (#70) AIR OUTLET VALVE (#69) AIR HOSE TANK (NOT INCLUDED) PRESSURE GAUGE AIR OUTLET (#65) PRESS
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8. Turn the Pressure Regulator (part #70) counterclockwise to increase the amount of compressed air to the air tool being used (from 90 PSI to 115 PSI). Turn the Pressure Regulator clockwise to decrease the amount of compressed air. (See Figure F.) 9. NOTE: If it is necessary to quickly depressurize the Air Compressor, turn off the Air Compressor by pushing DOWN on the “On/Off” Pressure Switch (part #66). Then, pull OUT on the ring on the Pressure Relief Valve (part #67) to quickly release sto
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INSPECTION AND MAINTENANCE 1. WARNING! Always unplug the Air Compressor from its electrical outlet before performing any inspection, maintenance, or cleaning. 2. Before each use: Inspect the general condition of the Air Compressor. Check for misalignment or binding of moving parts, cracked or broken parts, damaged wiring, damaged air hose, and any other condition that may affect its safe opera- tion. If abnormal noise or vibration occurs, have the problem corrected before further use.
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PARTS LIST Pn art # D. escriptio Q# tyPn art D. escriptio Qty 1tB4 ol 2r5W2 ashe 2dC1 ylinder Hea 2l6T7 ermina 3rC1 ylinder Cover Washe 2d7N2 ylon Ban 4t AB2 ol 2t9B4 ol 4r BE1 xhaust Valve Plate Space 3r0H2 olde 4e CE1 xhaust Valve Plat 3n1O2 verload Butto 4t DV1 alve Sea 3l4S1 haft Oil Sea 5nC2 olumn Pi 3g5B1 earin 6eI1 nlet Valve Plat 3r 6AM1 otor Stato 7rC1 ylinder Up Washe 3r 6BM1 otor Roto 8rC1 ylinde 3g7B1 earin 9rC1 ylinder Down Washe 3r8W1 ave Washe 1g 0AP2 iston Air Rin 3r9E1 le. Motor
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PARTS LIST (CONTINUED) Pn art # D. escriptio Q# tyPn art D. escriptio Qty 5r 3BT2 ank Wheel Cove 6e8N1 ippl 5t 4R2 etaining Ring In Shaf 6e9A1 ir Outlet Valv 5w 5E1 xhaust Elbo 7r0P1 ressure Regulato 5. 6E1 xhaust Copper Tube Assy 7e 1A1 ir Outlet Pressure Gaug 5e 7C1 heck Valv 7w2O1 il Level Windo 5. 8U1 nload Copper Tube Assy 7l3O1 il Level Window Sea 5e 9T1 ank Drain Valv 7t4B6 ol 6t 0I1 n-Six Angle Bol 7r5S1 pring Washe 6d 1F1 oot Rubber Pa 7r6C1 rankcase Front Cove 6r 2W1 ashe 7l7C1 rankcas
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ASSEMBLY DIAGRAM SKU 90234 PAGE 16 NOTE: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts.
