Oil-less air compressor 99780 99781 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© 2008 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.
NOTICE is used to address practices not related to personal injury. Save This Manual Keep this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference.
e. Dress properly. Do not wear loose clothing or jewelry. Keep your hair, clothing and gloves away from moving parts. Loose clothes, jewelry or long hair can be caught in moving parts. an increased risk of electric shock if your body is grounded. c. Do not expose tools to rain or wet conditions. Water entering a tool will increase the risk of electric shock. d. Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the tool. Keep cord away from heat, oil, sharp edges or moving parts.
other condition that may affect the tool’s operation. If damaged, have the tool repaired before use. Many accidents are caused by poorly maintained tools. f. Use the tool in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the tool for operations different from those intended could result in a hazardous situation. 5. Do not direct air flow from the Compressor at people or animals. 6. Industrial applications must follow OSHA requirements.
Save these instructions. mented – it prevents sustained electrical shock. 13. Some dust created by power sanding, sawing, grinding, drilling, and other construction activities, contains chemicals known [to the State of California] to cause cancer, birth defects or other reproductive harm.
electrically malfunction or break down, grounding provides a low resistance path to carry electricity away from the user, reducing the risk of electric shock. (See 3-Prong Plug and Outlet.) 2. 3. The grounding prong in the plug is connected through the green wire inside the cord to the grounding system in the tool. The green wire in the cord must be the only wire connected to the tool’s grounding system and must never be attached to an electrically “live” terminal. (See 3-Prong Plug and Outlet.
Note: For additional information regarding the parts listed in the following pages, refer to the Assembly Diagram near the end of this manual. Front Handle (25) Figure 1 Rear Handle (18) Knobs (29) Assembly 1. Connect the Front Handle (25) to the top of the Compressor with two Knobs on each side. See Figure 1. 2. Connect the Rear Handle (18) to the top of the Compressor with two Knobs (29) on each side. See Figure1. Front Brace (31) 3.
9. To prevent serious injury from accidental operation: Turn the Power Switch of the tool to its “OFF” position and unplug the tool from its electrical outlet before performing any inspection, maintenance, or cleaning procedures. Connect a 1/4” NPT air hose (rated 155 PSI or higher) to the air connection. The air hose must be long enough to reach the work area with enough extra length to allow free movement while working. 10.
b. wait until the Compressor cools down; PSI Gauge of Compressor Power Switch Safety Valve c. push the Circuit Breaker button; d. turn Power Switch back to the ON position and resume operation. 11. After the job is complete, move the Power Switch to the OFF position. Output Regulator PSI Gauge for Tool Circuit Breaker Air Outlet Connection 7. Allow the Air Compressor to build up pressure until it cycles off. 8.
Maintenance And Servicing Procedures not specifically explained in this manual must be performed only by a qualified technician. To prevent serious injury from accidental operation: Turn the Power Switch of the tool to its “OFF” position and unplug the tool from its electrical outlet before performing any inspection, maintenance, or cleaning procedures. To prevent serious injury from tool failure: Do not use damaged equipment.
Parts List Part 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Description Cover Power Switch Overload Protector Screw ST4.2x25 Upper Housing Cord Plate Screw ST3.5x16 Motor/Pump Assembly Screw Washer Bolt Washer Bracket Washer Regulator Screw ST4x18 Screw ST4x20 Cord Retainer Rear Handle Connector Valve SKU 99780-81 Parts List Qty.
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. SKU 99780-81 For technical questions, please call 1-800-444-3353.
Troubleshooting Problem Possible Causes Overheating 1. Poor ventilation. Compressor operates, but with low air output 2. Dirty cooling surfaces. 3. Compressor undersized for application. 1. Valve or regulator loose or leaking. 2. Valve or regulator damaged. 3. Air tank not pressurized yet. Incorrect pressure 1. Pressure gauge worn or gauge reading damaged. Likely Solutions 1. Move the compressor to an area with better air circulation. 2. Clean compressor. 3. Check air requirements of tools. 1.