® AIR COMPRESSOR 6.5 HP / 8 GAL. / GASOLINE POWERED Model 90749 ASSEMBLY AND 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.
PRODUCT SPECIFICATIONS Item Description Air Tank Capacity Air Tank Design 8 Gallons Wheelbarrow Dual Tank System Maximum Air PSI 115 PSI Cubic Feet Per Minute Rating 10.3 CFM @ 40 PSI / 8.5 CFM @ 90 PSI Air Outlet Size Tank Drain Valve Design 3/8” NPT Duel Bottom Tank Bleeders Automatic Compressor Shut-Off Yes, At 115 PSI Compressor Cylinder/Crankshaft Construction Wheel Size / Type Cast Iron 10”, 4.10/8.5-4, Pneumatic Power Source 6.
5. 6. USE EYE AND HAND PROTECTION. Wear ANSI approved safety impact eye goggles and heavy-duty work gloves when using this product. ANSI approved safety impact eye goggles and heavy-duty work gloves are available from Harbor Freight Tools. DRESS SAFELY. Do not wear loose clothing or jewelry, as they can become caught in moving parts. Wear a protective hair covering to prevent long hair from becoming caught in moving parts. If wearing a long-sleeve shirt, roll sleeves up above elbows. 7.
2. ALWAYS DISCONNECT THE AIR COMPRESSOR FROM ITS ELECTRICAL POWER SUPPLY SOURCE, RELEASE ITS AIR PRESSURE, AND DISCONNECT ALL PNEUMATIC TOOLS FROM THE MACHINE BEFORE PERFORMING ANY SERVICES OR MAINTENANCE. 3. WARNING: Make sure to fill the Air Compressor with a premium quality, 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. Note: Optimal capacity of the oil reservoir is 21.5 ounces. 4.
13. GASOLINE FUEL AND FUMES ARE FLAMMABLE, AND POTENTIALLY EXPLOSIVE. Use proper fuel storage and handling procedures. Always have several ABC Class fire extinguishers nearby. 14. KEEP THE AIR COMPRESSOR AND SURROUNDING AREA’S CLEAN AT ALL TIMES. 15. REFILL THE ENGINE WITH GASOLINE OUTDOORS OR ONLY IN WELL VENTILATED AREAS. Do not store, spill, or use gasoline near an open flame or heat devices such as a stove, furnace, or water heater which utilize a pilot light or any device that can produce a spark.
27. TO EXTEND THE LIFE OF YOUR AIR TOOLS AND EQUIPMENT, it is recommended to install an Oiler/Water Filter (not included) in series with the Air Output Line of the Air Compressor. (See Figure A.) TO AIR COMPRESSOR OUTLET LINE TO PNEUMATIC TOOL / EQUIPMENT FIGURE A OILER / WATER FILTER (NOT INCLUDED) 28. MAKE SURE TO READ AND UNDERSTAND ALL INSTRUCTIONS AND ® SAFETY PRECAUTIONS AS OUTLINED IN THE BRIGGS & STRATTON GASOLINE ENGINE USER MANUAL. 29.
ASSEMBLY INSTRUCTIONS NOTE: For additional references to the parts listed in the following pages, refer to the Assembly Diagram on page 12 and 13. Note: The only assembly required is as follows. A. Put on front Tire (35): An Washer (37) goes on each side of Tire and Axle (36) fits through hub of wheel. Insert Pin Lock (38) to keep wheel in place. Front Axle fits into Wheel Brackets (50) and is secured in place by two Bolts (part #41) with Washer (40), which are threaded into the hole in each Wheel Bracket.
the oil appears in the middle of the circle in the Oil Sight Gauge. (See Figure C.) 3. If the oil level is below the middle of the circle in the Oil Window (B23), UNSCREW (do not pull) the Oil Cap (23) out of the Oil Fill Hole. Next, add oil into the Oil Fill Hole until the level of oil reaches the middle of the circle as indicated in the Oil Window. Do not overfill. Note: Optimal capacity of the oil reservoir is 21.5 ounces.
7. Connect the air hose (not provided) to the previously installed 3/8” NPT Quick Coupler on the Air Outlet Line. Then, connect the other end of the air hose to the pneumatic tool or equipment (not provided) that is to be used. 8. Start the Gasoline Engine (5). Refer to the Gasoline Engine manufacturer’s instruction manual for further information. 9. Allow sufficient time for the Air Tanks’ Pressure Gauge (27) to indicate at least 80 PSI before using the Air Compressor. (See Figure I.
15. In the event fast decompression of the Air Tanks (39) is required, immediately turn off the Gasoline Engine (part #5) and pull out on the Pull Ring of the Safety Valve (42) until both Air Tanks have fully decompressed. (See Figures B, and E.) 16. Pull out on the Safety Valve (42) to immediately release air pressure in the Air Tanks (31). (See Figure I.) 17.
AIR FILTER COVER HEX SOCKET SET BOLT FILTER AIR SLEEVE FIGURE F 6. EVERY 500 HOURS OR 12 MONTHS: Replace the old compressor oil with new, premium quality, 30-weight, non-detergent, compressor oil. 7. TO CLEAN, wipe the Air Compressor with a damp cloth, using a mild detergent or mild solvent. 8. WHEN STORING, Keep the Air Compressor in a clean, dry location. 9. FOR ALL GASOLINE ENGINE (25) INSPECTION, MAINTENANCE, AND CLEANING INSTRUCTIONS REFER TO THE MANUFACTURER’S MANUAL.
PARTS LIST Part # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Description Belt Guard Inner Screw Washer Belt Guard Outer Gasoline Engine * Washer Nut Belt Pulley (Engine) Belt Bolt Nut Support Bar Nut Washer Compressor Pump Part # 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Description Air Tube Bolt Flat Washer Spring Washer Nut Control Wire Control Valve Assembly Handle Grip Handle Air Pressure Regulator Hose Connector (output) Pressure Gauge (output) Water Drainer Washer Screw Par t# 31 32 33 34 35 36 37 38
PARTS LIST (B) Part # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Description Part # Flat Washer Screw Screw Air Filter Cylinder Head Air Connector (output) Gasket Valve Seat Plate Gasket Valve Plate Gasket Cylinder Gasket Bolt Washer 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Description Crank Shaft Case Gasket Dip Stick Flat Washer Spring Washer Screw End Plate Oil Window O Ring Seal Screw O Ring Seal Bottom Plate Gasket Bearing Retaining Ring Par t# 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 Descripti
