PROFESSIONAL
6” DUAL ACTION
AIR SANDER
Model 90288
SET UP AND OPERATINg INSTRUCTIONS
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE ThIS MANUAL.
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. Diagrams within this
manual may not be drawn proportionally. Due to continuing improvements, actual
product may differ slightly from the product described herein. Tools required for
assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Revised Manual 10f
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in moving parts. Protective, electrically nonconductive clothes and nonskid
footwear are recommended when working. Wear restrictive hair covering to
contain long hair.
7. Use eye protection. Always wear ANSI approved impact safety goggles.
Wear a full face shield if you are producing metal filings or wood chips. Wear
an ANSI approved dust mask or respirator when working around metal, wood,
and chemical dusts and mists.
8. Do not overreach. Keep proper footing and balance at all times. Do not reach
over or across running machines.
9. Maintain tools with care. Keep tools clean for better and safer performance.
Follow instructions for changing accessories. Inspect tool periodically and if any
part appears broken or damaged, have it repaired by an authorized technician.
The handles must be kept clean, dry, and free from oil and grease at all times.
10. Disconnect power. Disconnect tool from air compressor when not in use.
11. Remove adjusting keys and wrenches. Check that adjusting wrenches are
removed from the tool or machine work surface before connecting it to its power
source.
12. Avoid unintentional starting. Be sure the air compressor switch is in the Off
position when not in use and before connecting to this tool. Do not carry any
tool with your finger on the trigger, whether it is plugged in or not.
13. Stay alert. Watch what you are doing, use common sense. Do not operate any
tool when you are tired.
14. Take caution as some woods contain preservatives such as copper chro-
mium arsenate (CCA) which can be toxic. When sanding these materials
extra care should be taken to avoid inhalation and minimize skin contact.
15. Check for damaged parts. Before using any tool, any part that appears dam-
aged should be carefully checked to determine that it will operate properly and
perform its intended function. Check for alignment and binding of moving parts;
any broken parts; and any other condition that may affect proper operation.
Any part that is damaged should be properly repaired or replaced by a qualified
technician. Do not use the tool if any switch does not turn On and Off properly.
16. guard against electric shock. Prevent body contact with grounded surfaces
such as pipes, radiators, ranges, and refrigerator enclosures.
17. Replacement parts and accessories. When servicing, use only identical
replacement parts. Use of any other parts will void the warranty. Only use ac-
cessories intended for use with this tool. Approved accessories are available
from Harbor Freight Tools.
For technical questions, please call 1-800-444-3353.
SKU 90288
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18. Do not operate tool if under the influence of alcohol or drugs. Read warning
labels on prescriptions to determine if your judgment or reflexes are impaired
while taking drugs. If there is any doubt, do not operate the tool.
19. Use proper size and type extension cord. If an extension cord is required
for the air compressor (not included), it must be of the proper size and type to
supply the correct current to the tool without heating up. Otherwise, the exten-
sion cord could melt and catch fire, or cause electrical damage to the tool.
20. Maintenance. For your safety, service and maintenance should be performed
regularly by a qualified technician.
Note: Performance of the compressor that powers this tool (if powered by line volt-
age) may vary depending on variations in local line voltage. Extension cord usage
may also affect compressor performance.
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. Some
examples of these chemicals are:
*Lead from lead-based paints
*Crystalline silica from bricks and cement or other masonry products
*Arsenic and chromium from chemically treated lumber
Your risk from these exposures varies, depending on how often you do this
type of work. To reduce your exposure to these chemicals: work in a well
ventilated area, and work with approved safety equipment, such as those
dust masks that are specially designed to filter out microscopic particles.
(California health & Safety Code § 25249.5, et seq.)
Warning: The warnings, cautions, and instructions discussed in this instruction
manual cannot cover all possible conditions and situations that may occur. It
must be understood by the operator that common sense and caution are factors
which cannot be built into this product, but must be supplied by the operator.
Unpacking
When unpacking, check to make sure all parts listed on Page 7 are included.
If any parts are missing or broken, please call Harbor Freight Tools at the number
on the cover of this manual.
For technical questions, please call 1-800-444-3353.
SKU 90288
Page 4
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Air Connection
AIR SANDER
Note: Air Compressor is not supplied. You will need an Air Compressor with a
minimum rating of one horsepower, 4 CFM delivery at 90 PSI, and a 12 Gallon Air
Tank. Refer to the above illustration for complete air connection setup.
You may use Quick Connectors, Quick Couplers, (not supplied) and Air Regulator
as shown in the Diagram above. Do not connect Couplers directly to the Air Inlet
(2). Doing so will increase the overall bulk of the tool and strain the Inlet Threads.
Be sure to follow all safety precautions as listed on Pages 2-4 of this manual and
the instruction manual for the Air Compressor being used.
This air tool requires lubrication during operation. For best results, it is recom-
mended to have an oiler and water filter in line with the air supply as shown in the
diagram above. This will extend the life of the tool.
To Attach Sanding Paper And The Pad:
1.
Ensure that the Pad is firmly screwed onto the Drive Spindle (38). The
Spindle Lock (41) turns to engage the Drive Spindle (38), allowing the
Pad (44) to be threaded on securely. Turn the Spindle Lock (41) back out
of the way before use. If the Orbital Hub is still in the locked position
during use, then the Sander will not operate properly. (See Bottom
View, next page.)
2.
The Sander only uses 6” diameter, PSA Stick, (self-sticking) Sanding
Paper (not included). Make sure to attach the Sanding Paper firmly to
the Pad (44).
REV 05e
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SKU 90288
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BOTTOM VIEW
SPINDLE LOCK (41)
DRIVE SPINDLE (38)
- LOCKED -
To tighten or
- UNLOCKED -
For operation
loosen pad
Operation
1. Familiarize yourself with all safety precautions before operation.
2. Tighten all work pieces to your work surface with a clamp or vise so that both
of your hands are free to operate the Sander.
3. Set the air compressor’s pressure regulator to 90 PSI. Connect the Sander to
the air compressor’s hose at the Air Inlet. Use the Air Pressure Regulator (19)
to fine tune or adjust the air pressure further.
4. Check to be sure all attachments are secure before turning on the tool.
5. Grip the Handle with your left hand and the Housing (1) with your right (reverse
if you are left-handed). Depress the Trigger (16) with your right hand to turn
the tool on. Allow the motor to reach its full speed before sanding. Make sure
the Air Sander is running properly. Make sure the Pad is rotating evenly and
all parts appear to be working properly. Always maintain a firm grip with both
hands when operating this tool.
6. NOTE: If the Sander will not turn properly when it contacts the workpiece, dis-
connect the air supply and verify that the Spindle Lock (41) is in the unlocked
position. (See illustration above.)
7. To begin sanding, approach the material at an angle between 15-30° to the
Pad. Maintain that angle until you are finished sanding. Always keep a safe
REV 04k, 05e
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SKU 90288
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distance from the sanding pad while the Sander is operating. Do not force the
Pad or apply too much pressure. If the Pad slows down as you work with your
material, you are applying too much pressure. Always keep your body and
clothing a safe distance from the running Air Sander.
8. Once you have turned the Sander off, continue to hold onto the tool with both
hands until the Pad stops spinning completely and before you set it down.
Disconnect Sander from compressor when finished.
Maintenance
Be sure to follow all recommended steps for Maintenance as listed on Pages 3-4.
Sanding Pads must be clean and sharp for maximum sanding efficiency and
safety. Do not use cracked or torn Sanding Pads.
Parts List
Part
1
2
3
4
5
6
7
8
Description
Housing
Air Inlet
O-Ring
Spring
O-Ring
Valve Stem
O-Ring
O-Ring
O-Ring
Valve Body
Screw
Bracket
Trigger Screw
Screw
Q’ty
1
1
1
1
4
1
1
1
1
1
1
1
1
1
1
1
Part
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Description
Rubber
Retainer Ring
Air Regulator
Retainer Ring
Bearing
End Plate
Cylinder
O-Ring
Q’ty
1
1
1
1
2
2
1
1
1
1
5
1
1
1
1
2
Part
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Description
Screw
Balancer
Screw
Q’ty
2
1
1
1
1
1
1
1
1
1
1
1
1
1
Screw
Bearing
Drive Spindle
Retainer Ring
Cap
Spindle Lock
Washer
Screw
Pad
Washer
Wrench
9
Pin
Rotor
10
11
12
13
14
15
16
Rotor Blade
Work Spindle
Woodruff Key
Rear Gasket
Rear Cover
Screw
Cap
Trigger
PLEASE READ ThE FOLLOWINg CAREFULLY
THE MANUFACTURERAND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM
IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DIS-
TRIBUTOR MAKESANY REPRESENTATION OR WARRANTY OFANY KIND TO THE BUYER THAT
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 THATALL REPAIRSAND PARTS REPLACEMENTS
SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT BY THE
BUYER. THE BUYERASSUMESALLRISKAND LIABILITYARISING 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.
NOTE: Some parts are listed and shown for illustration purposes only and are not avail-
able individually as replacement parts.
REV 04i, 04k, 05e, 06d, 10f
For technical questions, please call 1-800-444-3353.
SKU 90288
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REV 04i, 04k, 05e, 06d, 10f
For technical questions, please call 1-800-444-3353.
SKU 90288
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90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high qual-
ity and durability standards, and warrants to the original purchaser that this product is
free from defects in materials and workmanship for the period of 90 days from the date of
purchase. This warranty does not apply to damage due directly or indirectly, to misuse,
abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity,
improper installation, normal wear and tear, or to lack of maintenance. We shall in no event
be liable for death, injuries to persons or property, or for incidental, contingent, special
or consequential damages arising from the use of our product. Some states do not allow
the exclusion or limitation of incidental or consequential damages, so the above limitation
of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with trans-
portation charges prepaid. Proof of purchase date and an explanation of the complaint
must accompany the merchandise. If our inspection verifies the defect, we will either repair
or replace the product at our election or we may elect to refund the purchase price if we
cannot readily and quickly provide you with a replacement. We will return repaired prod-
ucts at our expense, but if we determine there is no defect, or that the defect resulted from
causes not within the scope of our warranty, then you must bear the cost of returning the
product.
This warranty gives you specific legal rights and you may also have other rights which vary
from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
For technical questions, please call 1-800-444-3353.
SKU 90288
Page 9
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