Harbor Freight Tools 90749 Air Compressor User Manual
Contents
1. Air Compressor and void its warranty Refer to the engine manufacturer s instruction manual for further information 9 Check to make sure the Drain Plugs on both Air Tanks 31 are fully closed See Figures D and E TYPICAL DRAIN PLUGS 1 4 A W EN PIPE FIGURE D 6 Turn the Tool Pressure Valve 13 clockwise all the way to allow compressed air to build up in the Air Tanks 31 See Figure B REV 02 04 SKU 90749 For technical questions please call 1 800 444 3353 Page 8 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 Allow sufficient time for the Air Tanks Pressure Gauge 27 to indicate at least 80 PSI before using the Air Compressor See Figure I AIR FILTER B4 SAFETY COVER 31 ONTROL VALVE ASSEMBLY aimem GASOLINE ENGINE 5 22 i ii Hee LL i PRESSURE GAUGE 44 AIR OUTLET LINE PRESSURE GAUGE 27 SAFETY VALVE 42 TIRE 35 DRAIN PLUG AIR TANK 31 FIGURE E 10 the Control Valve Assembly 22 counterclockwise to allow air to the pneumatic tool See Figures B and E 11 NOTE When adjusting the air pres2. 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 SKU 90749 For technical questions please call 1 800 444 3353 Page 6 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 Each Handle 24 fits into the Handle Bracket 45 on the side of the Air Tank 31 Secure each Handle in place with 2 Washer Screw combinations 29 and 30 After assembly is complete test the roll ability of the Air Compressor Make sure Front Wheel rolls properly with no wobble Make sure the Handles are securely in place Prior to using the Air Compressor requires the attachment of a 3 8 NPT Quick Coupler not included to the T Connector 43 of the Pressure Gauge 44 To do so wrap approximately 4 of thread seal tape not included around the male threads of the Quick Coupler Then wrench tighten the Quick Coupler into the T Connector See Figure B QUICK COUPLER TOOL NOT INCLUDED PRESSURE VALVE 1
3. 22 23 24 25 26 GASOLINE FUEL AND FUMES ARE FLAMMABLE AND POTENTIALLY EXPLOSIVE Use proper fuel storage and handling procedures Always have several ABC Class fire extinguishers nearby KEEP THE AIR COMPRESSOR AND SURROUNDING AREA S CLEAN AT ALL TIMES 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 DO NOT REFILL THE ENGINE WITH GASOLINE WHILE THE ENGINE IS RUNNING OR HOT WHEN SPILLS OF FUEL OR OIL OCCUR THEY MUST BE CLEANED UP IMMEDIATELY Dispose of fluids and cleaning materials as per all local state and federal codes and regulations Store oil rags in a covered metal container DO NOT OPERATE THE AIR COMPRESSOR WITH KNOWN LEAKS IN THE FUEL SYSTEM NEVER STORE FUEL OR OTHER FLAMMABLE MATERIALS NEAR THE AIR COMPRESSOR WARNING CARBON MONOXIDE CAN CAUSE SEVERE NAUSEA FAINTING OR DEATH DO NOT OPERATE THE AIR COMPRESSOR INSIDE A CLOSED BUILDING OR A POORLY VENTILATED AREA FIRE AND EXPLOSION DANGER AVOID CONTACT WITH HOT FUEL OIL AND EXHAUST FUMES PROLONGED EXPOSURE TO NOISE LEVELS ABOVE 85 dBA IS HAZARD OUS TO HEARING ALWAYS WEAR ANSI APPROVED HEARING PROTEC TION WHEN OPERATING OR WORKING NEAR THE AIR COMPRESSOR WHEN IT IS RUNNING ALWAYS FOLLOW AND COMPLETE SCHEDULED AIR COMPRESSOR AND
4. 3 SAFETY VALVE 42 T CONNECTOR 43 p PRESSURE Io GAUGE 44 FIGURE OPERATING INSTRUCTIONS CAUTION ALWAYS make sure the Air Compressor is filled to the proper level with a premium quality 30 weight non detergent compressor oil prior to turning on the machine Failure to do so will result in damage to the Air Compressor and void its warranty To check the level of oil in the Air Compressor observe the Oil Window B23 located on the Crank Shaft Case 16 Proper oil level is indicated when REV 02 04 SKU 90749 For technical questions please call 1 800 444 3353 Page 7 the oil appears in the middle of the circle in the Oil Sight Gauge See Figure 3 If the oil level is below the middle of the circle in the Oil Window B23 UN SCREW 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 Then screw the Oil Cap back onto the Oil Fill Hole being careful not to strip the plastic threads See Figure C FRONT VIEW SIDE VIEW OIL CAP 23 OIL WINDOW B23 FIGURE C 4 CAUTION ALWAYS make sure the crankcase of the Gasoline Engine 5 is filled to the proper level with a premium quality 30 weight non detergent engine oil prior to starting the engine Failure to do so will result in damage to the
5. CENTRAL PNEUMATIC 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 Revised Cover Page 10 04 PRODUCT SPECIFICATIONS Air Tank Capacity Air Tank Design Maximum Air PSI Cubic Feet Per Minute Rating Air Outlet Size Tank Drain Valve Design Automatic Compressor Shut Off Yes At 115 PSI Compressor Cylinder Crankshaft Construction Wheel Size Type 10 4 10 8 5 4 Pneumatic Power Source 6 5 HP Briggs amp Stratton Intek Gasoline Engine Engine Displacement 206cc Recoil Start SAVE THIS MANUAL You will need this manual for the safety warnings and precautions assembly operating 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 invoice in a safe and dry place for future reference GENERAL SAFETY WARNINGS AND PRECAUTIONS Never use compressed air on yourself or another to blow off clothing skin or hair 1 KEEP WORK AREA CLEAN AND DRY Cluttered d
6. ENGINE MAINTENANCE CAUTION THE AIR COMPRESSOR CONTAINS NO AIR COMPRESSOR OIL Follow lubrication instructions before operating the Air Compressor CAUTION THE GASOLINE ENGINE 5 CONTAINS NO ENGINE OIL Refer to the engine manufacturer s lubrication instructions before operating the Engine WHEN CHECKING THE ENGINE S OIL LEVEL Make sure to unscrew do not pull the Dip Stick out SKU 90749 For technical questions please call 1 800 444 3353 Page 5 27 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 TO AIR PNEUMATIC TOOL EQUIPMENT OILER WATER FILTER FIGURE A NOT INCLUDED 28 MAKE SURE TO READ AND UNDERSTAND ALL INSTRUCTIONS AND SAFETY PRECAUTIONS AS OUTLINED IN THE BRIGGS amp STRATTON GASOLINE ENGINE USER MANUAL 29 WARNING MAKE SURE TO TURN OFF THE GASOLINE ENGINE RELEASE ALL PRESSURE FROM THE SYSTEM AND ALLOW THE UNIT TO COMPLETELY COOL BEFORE PERFORMING ANY INSPECTION MAINTENANCE OR CLEANING PROCEDURES ON THE UNIT 30 WARNING This product contains or produces a chemical known to the State of California to cause cancer and birth defects or other reproductive harm California Health amp Safety Code 25249 5 et seq UNPACKING When unpacking check to make sure all the parts shown on the Parts List on page 12 and 13 are included
7. T 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 SKU 90749 For technical questions please call 1 800 444 3353 Page 11 PARTS LIST a olt gt Bolt pring Washer ontrol Wire ontrol Valve Assembly Pressure Gauge Tank 0 See Briggs amp Stratton Engine Parts List and Assembly Diagram for available replacement parts ASSEMBLY DIAGRAM i ole 21 C 22 C gt w Y Fu H ii az i ar a in 21 tie Lb x gt ttt 1 1 i i 4 5 t i PUEN D m 3 g f z A h KD gt lt fi e oe 45 ey a NOTE Some parts listed and shown for illustration purposes only and not available individually as replacement parts SKU 90749 For technical questions please call 1 800 444 3353 Page 12 PARTS LIST pring Washer Piston Ring lat Washe
8. VIRONMENT 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 the Air Compressor in areas near flammable chemicals dusts and vapors SKU 90749 For technical questions please call 1 800 444 3353 Page 3 10 11 12 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 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 MAKE SURE ALL TOOLS AND EQUIPMENT USED WITH THE AIR COMPRESSOR ARE RATED TO THE APPROPRIATE PSI CAPACITY Do not use any tool or equipment that operates over 115 PSI DRAIN AIR COMPRESSOR EVERY DAY Do not allow moisture to build up inside the Air Tanks 31 Do not allow the Air Compressor to sit pressurized for longer than one hour DO NOT REMOVE THE FACTORY SEALED PRESSURE RELIEF VALVE 13 DO NOT OPEN THE AIR COMPRESSOR TANKS DRAIN PLUGS SO THAT MORE THAN FOUR THREADS ARE SHOWING THE AIR COMPRESSOR TANKS SAFETY VALVE 42 SHOULD NOT BE ADJUSTED This Valve automatically releases air if the Ta
9. acted from the job at hand CHECK FOR DAMAGED PARTS Before using this product carefully check that it will operate properly and perform its intended function Check for damaged parts and any other conditions that may affect the operation of this product Replace or repair damaged or worn parts immediately REPLACEMENT PARTS AND ACCESSORIES When servicing use only identical replacement parts Only use accessories intended for use with this product Approved accessories are available from Harbor Freight Tools MAINTAIN THIS PRODUCT WITH CARE Keep this product clean and dry for better and safer performance MAINTENANCE For your safety service and maintenance should be performed regularly by a qualified technician USE THE RIGHT TOOL FOR THE JOB Do not attempt to force a small tool or attachment to do the work of a larger industrial tool There are certain applications for which this tool was designed It will do the job better and more safely at the rate for which it was intended Do not modify this tool and do not use this tool for a purpose for which it was not intended 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 product but must be supplied by the operator SPECIFIC PRODUCT WARNINGS AND PRECAUTIONS MAINTAIN A SAFE WORKING EN
10. amp or wet work areas invite injuries 2 KEEP CHILDREN AWAY FROM WORK AREA Do not allow children to handle this product 3 STORE IDLE EQUIPMENT When not in use tools and equipment should be stored in a dry location to inhibit rust Always lock up tools and equipment and keep out of reach of children 4 DO NOT USE THIS PRODUCT IF UNDER THE INFLUENCE OF ALCOHOL OR DRUGS Read warning labels on prescriptions to determine if your judgement or reflexes are impaired while taking drugs If there is any doubt do not attempt to use this product REV 10 05 REV 02 06 SKU 90749 For technical questions please call 1 800 444 3353 Page 2 10 11 12 13 14 15 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 DO NOT OVERREACH Keep proper footing and balance at all times to prevent tripping falling back injury etcetera INDUSTRIAL APPLICATIONS MUST FOLLOW OSHA REQUIREMENT STAY ALERT Watch what you are doing at all times Use common sense Do not use this product when you are tired or distr
11. cessary fill with a premium quality 30 weight non detergent compressor oil NOTE When checking the Air Compressor oil level make sure to unscrew do not pull the Oil Cap 23 EVERY 100 HOURS OF USE Clean the Air Filter B4 with a mild solvent Then dry and reattach the Air Filter Sleeve Replace the Air Filter Sleeve if it is too dirty to properly clean To clean or replace the Air Filter Sleeve remove the two Hex Socket Set Bolts Remove the Air Filter Cover Remove the Air Filter Sleeve and clean Then replace the Air Filter Sleeve and two Hex Socket Set Bolts See Figures E and F REV 02 04 SKU 90749 For technical questions please call 1 800 444 3353 Page 10 AIR FILTER COVER HEX SOCKET SET BOLT FI 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 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 THA
12. inished using the Air Compressor turn off the Gasoline Engine 5 and pull out on the Pull Ring of the Safety Valve 42 until both Air Tanks 31 have fully decompressed See Figures B and E INSPECTION MAINTENANCE AND CLEANING CAUTION Always release all pressure from the system and disconnect all tools from the Air Compressor before performing any inspection maintenance or cleaning Be aware that the sudden release of air from any valve or air tool can present a danger to one s ears BEFORE EACH USE inspect the general condition of the Air Compressor Check all air fittings for leaks Check for loose screws misalignment or binding of moving parts cracked or broken parts damaged and any other condition that may affect the safe operation of this tool If abnormal noise or vibration occurs immediately release all pressure from the system and have the problem corrected before further use Do not use damaged equipment DAILY EMPTY CONDENSATION FROM THE AIR TANKS 31 The Drain Plugs are located underneath each Air Tank and should be used daily to release all trapped moisture that may cause Air Tank corrosion Slowly and carefully unscrew no more than four threads the Drain Plugs until the condensation begins to be released from the Air Tanks Allow sufficient time for all of the condensation to escape from the Air Tanks Then firmly retighten the Drain Plugs See Figure E DAILY Check the Air Compressor oil level If ne
13. nk pressure exceeds the preset maximum NEVER ATTEMPT TO REPAIR OR MODIFY THE AIR TANKS 31 Welding drilling or any other modification will weaken the Tanks resulting in damage from rupture or explosion Always replace worn cracked or damage Tanks NEVER OPERATE THE AIR COMPRESSOR WITHOUT ITS SAFETY COVER 31 ATTACHED AND IN GOOD WORKING ORDER Air Compressor scan start automatically without warning Personal injury and or property damage could result from contact with moving parts THE AIR COMPRESSOR PARTS MAY BE HOT EVEN IF THE UNIT IS STOPPED Keep fingers away from the running Air Compressor Fast moving and hot parts will cause injury and or burns DO NOT SPRAY FLAMMABLE MATERIALS IN THE VICINITY OF AN OPEN FLAME OR NEAR IGNITION SOURCES INCLUDING THE AIR COMPRESSOR UNIT Do not direct paint or other sprayed materials at the Air Compressor Locate the Air Compressor as far away from the spraying area as possible to minimize overspray and accumulation on the Air Compressor Use a face mask respirator when spraying and spray in a well ventilated area to prevent health and fire hazards Do not smoke when spraying paint insecticides or other flammable substances When spraying or cleaning with solvents or toxic chemicals follow the instructions provided by the chemical manufacturer REV 02 04 SKU 90749 For technical questions please call 1 800 444 3353 Page 4 13 14 15 16 17 18 19 20 21
14. r ylinder Head ir Connector output Valve Seat Plate Gasket _6 ae _8 Or 42 ow 34 C7 10 35 FS a EEA 3 AS Sf 29 30 31 7 pe 30 2 29 SKU 90749 For technical questions please call 1 800 444 3353 Page 13
15. sure being forwarded to the pneumatic tool you will need to compare the pressure readings of both the Tanks Pressure Gauge 27 and the outlet Pressure Gauge 44 The reading on the Tanks Pressure Gauge dictates the maximum air pressure at which the outlet Pressure Gauge may be set See Figure E 12 With the Air Compressor running and the air hose and pneumatic tool hooked up to the Air Compressor turn the Control Valve Assembly 22 counterclockwise to increase the air output to the tool up to the maximum rated pressure 115 PSI as indicated on the Tanks Pressure Gauge 27 See Figure E In any case never exceed the pressure rating of the hose or tool connected to compressor 13 the Control Valve Assembly 22 clockwise to decrease the air output to the tool down to the minimum rated pressure 0 PSI as indicated on the Tanks Pressure Gauge 27 See Figure E 14 The Safety Valve 42 is used when decompression is needed quickly and efficiently See Figure B SKU 90749 For technical questions please call 1 800 444 3353 Page 9 15 16 17 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 Pull out on the Safety Valve 42 to immediately release air pressure in the Air Tanks 31 See Figure l When f
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