PRESSURE BLASTING SYSTEM Model 93889 ASSEMBLY AND OPERATING INSTRUCTIONS Due to continuing improvements, actual product may differ slightly from the product described herein. ® 3491 Mission Oaks Blvd., Camarillo, CA 93011 Visit our Web site at: http://www.harborfreight.com TO PREVENT SERIOUS INJURY, READ AND UNDERSTAND ALL WARNINGS AND INSTRUCTIONS BEFORE USE. Copyright © 2006 by Harbor Freight Tools®. All rights reserved.
PRODUCT SPECIFICATIONS Item Media Tank Capacity Maximum Tank Pressure Pressure Gauge Indicator Required Compressed Air System (Not Included) Recommended Media Type Recommended Use Water Trap Type Accessories Net Weight Description 90 Pounds 125 PSI 0 ~ 150 PSI 2 HP Compressor With 3/8” Diameter Air Hose Glass Bead / Silicon Carbide Alumina / Walnut Shell / Brass Bead Use with 80, 100, or 120 Grit Media, at 60 PSI, with 3/32” Nozzle for best results (Run Time: 45 minutes with 90 Lbs.
4. WARNING! Always wear ANSI-approved safety impact eye glasses under a full face shield, a respirator, and heavy duty work gloves when operating the Pressure Blasting System. Also, wear heavy duty work boots, long trousers, and long sleeve shirt. 5. Stay within air pressure capacity. Never operate the Pressure Blasting System above 125 PSI. 6. Keep children away. Children must never be allowed in the work area. Do not let them handle equipment, tools, extension cords, or air hoses. 7.
15. Replacement parts and accessories. This product is to be repaired and serviced only by a qualified technician. When this product is serviced, only identical replacement parts should be used. Use of any other parts will void the warranty. Only use accessories intended for use with this tool. Approved accessories are available from Harbor Freight Tools. 16. Do not operate this product if under the influence of alcohol or drugs.
outlined in the manufacturer’s manual for the object you intend to sandblast. 28. Avoid unintentional starting. Make sure the Control Lever on the Gun is in its “OFF” or “CLOSED” position when the tool is not being used. 29. WARNING! Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contain chemicals known (to the State of California) to cause cancer, birth defects, or other reproductive harm.
. Use respiratory protection when source controls cannot keep silica exposures below the recommended levels. 7. Provide periodic medical examinations for all workers who may be exposed to crystalline silica. 8. Post signs to warn workers about the hazard and to inform them about required protective equipment. 9. Provide workers with training that includes information about health effects, work practices, and protective equipment for crystalline silica. 10.
To Attach The Handle: 1. To attach the Handle (2) to the Tank Assembly (3), align the two mounting holes in the Handle with the two mounting holes located on the side of the Tank. Then secure the Handle to the Tank, using two Screws (11), two Flat Washers (10), and two Hex Nuts (9). (See Figure B.) HANDLE (2) TANK ASSEMBLY (3) SCREW (11) HEX NUT (9) FIGURE B FLAT WASHER (10) To Attach The Tank Leg: 1.
To Attach The Wheels: 1. Align the two mounting holes in each of the two Wheel Brackets (20) with the two threaded mounting holes in each of the two Shaft Supporting Bars at the bottom of the Tank Assembly (3). Then, use four Screws (16) to secure the Wheel Brackets to the Shaft Supporting Bars. (See Figure D.) 2. Insert the Steel Axle (23) through the bottom hole of each of the two Wheel Brackets (20). Place a Flat Washer (21) onto each end of the Steel Axle.
To Attach A Quick Connector: 1. Prior to use, the Pressure Blasting System requires the attachment of a Quick Connector (not included) to its Air Input Valve (14). To do so, make sure the screen Air Filter within the Valve Body is properly seated in the Valve Body. Wrap approximately 3” of Pipe Thread Seal Tape (47) around the male threads of the Quick Connector. Then, firmly tighten the Quick Connector into the Valve Body. (See Figure F.
2. Make sure the media used is dry to avoid clogging the Media Metering Valve (18), Media Manifold (19), or Material Hose (25). (See Figure G.) 3. WARNING! Always wear ANSI-approved safety impact eye glasses under a full face shield, a respirator, and heavy duty work gloves when operating the Pressure Blasting System. Also, wear heavy duty work boots, long trousers, and long sleeve shirt. 4. Turn the Air Input Valve (14) to the “OFF” (horizontal) position. (See Figure G.) 5.
Cover (43). Position the Nozzle Gasket (41) against the Pipe Adapter (40). Position the proper Nozzle against the Nozzle Gasket. Then screw the Nozzle Cover back onto the Pipe Adapter to secure the Nozzle Gasket and Nozzle in place. (See Figure H.) SANDBLASTING GUN FIGURE H NOZZLE (42, 42A) NOZZLE COVER (43) NOZZLE GASKET (41) PIPE ADAPTER (40) To Operate The Pressure Blasting System: 1. If possible, place the workpiece inside a sandblast cabinet.
8. Point the Sandblasting Gun at the workpiece so that the media will strike the surface of the workpiece at about a 45 degree angle. 9. Squeeze the Control Lever (34) of the Sandblasting Gun to release the media. NOTE: The flow rate of the media may be irregular when the Sandblasting Gun is first started. Provided the media is dry, the flow rate will become normal in approximately one minute. (See Figure G.) 10. Adjust the Media Metering Valve (18) to increase or decrease the media flow rate.
Metering Valve (18) and Air Input Valve (14) to the “OFF” position. Use the Safety Valve (6) to release any remaining air pressure in the Tank Assembly (3). Check to make sure the Pressure Gauge reads “0” PSI. Then, disconnect the compressor air hose from the Quick Connector on the Pressure Blasting System. 2. Before each use, inspect the general condition of the Pressure Blasting System and its accessories.
TROUBLESHOOTING Blast flow surges. Problem Possible Solution 1. Air pressure too low. Increase air pressure. Excessive media consumption. 2. Too much media. Adjust media valve. 1. Media valve open to far. Close slightly. Clogging and plugging of blast flow. 2. Air pressure too low. Increase air pressure. 1. Excessive debris in media. Purge and filter. 2. Media size too large. Use smaller grit size. 3. Nozzle plugging. Use larger nozzle. 4. Nozzle plugging. Adjust media valve.
PARTS LIST Part # 1 2 3 4 5 6 7 7A 8 9 10 11 12 13 14 16 17 18 19 20 21 22 23 24 25 Description T-Handle w/Seal Handle Tank Assembly Hood Pressure Gauge Safety Valve Brass Nipple (3/8” NPT) Brass Nipple (3/8” NPT/37 Degree Flare) Intake Manifold Hex Nut (M6) Flat Washer (M6) Screw (M6x30) Water Trap Air Hose (3/8”x32”) Air Input Valve Screw (M8x10) Tank Leg Media Metering Valve Media Manifold Wheel Bracket Flat Washer (M12) Wheel Steel Axle Cotter Pin Material Hose Part # 26 27 28 29 30 31 32 33 34 35 36
ASSEMBLY DIAGRAM 1 2 4 5 3 6 7 8 9 10 18 11 36 12 43 35 7A 39 37 34 14 33 13 24 38 32 41 42, 42A 40 16 45 31 27 29 17 28 24 7 44 18 26 16 25 21 7 20 19 47: Pipe Thread Tape Not Shown. 22 23 24 NOTE: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts.
