Oliver 6303 User manual

Sander
Model 6303
Owner’s Manual
For Models Manufactured Since 07/2017
Oliver Machinery
1-800-559-5065
921 Thomas Ave SW,
Renton, WA 98057
[e-mail]
Stock Number: 6903.001
Manual Version: 2.0.0

READ AND UNDERSTAND ALL INSTRUCTIONS IN THIS MANUAL BEFORE
ATTEMPTING TO ASSEMBLE OR OPERATE THE MACHINE.
FOLLOW THE INSTUCTIONS AND THINK SAFETY!
THE OWNER OF THIS MACHINE IS SOLELY RESPONSIBLE FOR THE SAFETY OF ANYONE USING
THIS MACHINE. SUCH RESPONSIBILITY INCLUDES BUT NOT LIMITED TO:
• PROPER ASSEMBLY, OPERATION, INSPECTION, MAINTENANCE, AND RELOCATION OF
THE MACHINE.
• PROPER TRAINING FOR THE OPERATORS AND ENSURES THIS MANUAL IS AVAILABLE
AT ALL TIMES.
• USAGE AUTHORIZATION.
• USAGE OF SAFETY AND PROTECTION DEVICE.
OLIVER MACHINERY DISCLAIMS ANY LIABILITY FOR MACHINES THAT HAVE BEEN ALTERED OR
ABUSED. OLIVER MACHINERY RESERVES THE RIGHT TO EFFECT AT ANY TIME, WITHOUT PRIOR
NOTICE, THOSE ALTERATIONS TO PARTS, FITTINGS, AND ACCESSORY EQUIPMENT WHICH THEY
MAY DEEM NECESSARY FOR ANY REASON WHATSOEVER.
** SAVE THIS MANUAL FOR FUTURE REFERENCES. **
PROP 65 NOTICE
WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust,
and/or other 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, cement and other masonry products.
• Arsenic and chromium from chemically-treated lumber.
Avoid inhaling wood dust and other harmful chemicals. Use a dust mask and/or other safety
devices for personal protection.
For more information go to http://www.P65Warnings.ca.gov/wood

Table of Contents
Introduction············································· 4
Specifications ·········································· 5
Identification ··········································· 7
Safety······················································ 8
General Safety Guidelines···························8
Safety Guidelines Specific to Sander··········10
Electricals ···············································11
Minimum Circuit Size Required for Model
6303 Sander ·············································11
Grounding ················································11
Electrical Wiring ·······································12
Setup······················································13
Shop Preparation······································13
Receiving··················································14
Inventory ·················································15
Initial Assembly ········································17
Rubber Feet Installation··································17
Cabinet Assembly············································18
Mounting Sander ············································20
Cleaning···························································20
Sanding Belt Installation··································21
Dust Chute Installation····································22
Stop Bracket Installation ·································22
Set Up Contour Sanding Table ························23
Dust Collection ·········································24
Test Run···················································25
Operation···············································26
Preparation before Sanding ······················26
Material Selection and Inspection ··················26
Support Large Workpiece································26
Safety Devices ·················································26
Adjustments·············································27
Platen Angle Adjustment ································27
Table Height Adjustment ································27
Edge Sanding············································28
Horizontal Sanding ···································29
Contour Sanding·······································30
Accessories ············································ 31
Maintenance ········································· 32
Changing Sanding Belt ······························33
Inspect / Adjust Belt Tracking ···················34
Troubleshooting····································· 35
Wiring Diagrams···································· 37
Parts List················································ 38
Table and Base ·········································38
Stand ·······················································39
Motor and Sander Assembly ·····················40
Idler Drum················································41
Maintenance Record······························ 46
Notes····················································· 47
Warranty and Service····························· 48

4 | Page Oliver Machinery 6303 Sander
Introduction
Thank you for choosing Oliver! This manual contains important information on how to safely set up,
operate, and maintain this machine. Please take the time to read through this manual, and make sure you
understand all instructions.
While this manual may provide tips on optimizing the result of your workpiece, the manual is not intended
as a substitute for formal woodworking training. If you need to know how to safely perform an operation,
please consult knowledgeable and qualified sources before proceeding further.
We made every effort to keep this manual up-to-date. Instructions, specifications, drawings, and
photographs in this manual should match the machine delivered. If you find any differences, or anything
that seems confusing in this manual, please check our website for an updated version:
WWW.OLIVERMACHINERY.NET/MANUALS
Alternatively, you can contact our technical support for help:
1-800-559-5065
Before calling, please note down the manufacture date and serial
number of the machine. You can find the information on a
nameplate located on the back of the machine cabinet. This
information is needed to provide proper technical support, and
to determine if an updated manual is available for your machine.
Please let us know how well this manual serves you. If you have
any suggestions, please call the number above or email us at:
[e-mail]
We love to hear from our customers and make improvements.

6303 Sander OLIVERMACHINERY.NET 5|Page
Specifications
Quick View
Model
6303 Sander
Stock Number
6303.001
Power Requirement
115V / 230V, 1Ph, 60Hz
Motor
TEFC 1.5HP, 115V / 230V, 1Ph
Sanding Belt Size
6” x 89”
Sanding Belt Tilt
0° - 90°
Dimensions
48“(W) x 23”(D) x 48”(H)
Footprint
21-1/2”(W) x 16-1/2”(D)
Fully Assembled Weight
257 lbs.
Warranty
1 Year (Motor and electronics)
2 Years (All other parts)
Product Dimensions
Width x Depth x Height (Fully Assembled)
48“(W) x 23”(D) x 48”(H)
Footprint
21-1/2” (W) x 16-1/2”(D)
Fully Assembled Weight
257 lbs.
Shipment Info
Packaging
Cardboard Box and Pallet
Content
Sander with Included Accessories
Dimensions
36”(L) x 35-1/2”(W) x 56”(H)
Weight
273 lbs.
Approx. Assembly Time
60 Minutes
Must Ship Upright
YES
Stackable
NO
Electricals
Power Requirement
115V / 230V, 1Ph, 60Hz
Prewired Voltage
115V
Full Load Current Rating
18A @ 115V, 9A @ 230V
Recommended circuit size
20A @ 115V, 15A @ 230V
Power Switch Type
Magnetic Switch
Connection Type
NEMA 5-15 Plug with 6’ 14AWG Cord

6 | Page Oliver Machinery 6303 Sander
Motor
Motor Type
TEFC
Horsepower
1.5HP
Power Requirement
115V / 230V, 1Ph, 60Hz
Full Load Current Rating
18A @ 115V / 9A @ 230V
Speed
3450 RPM
Efficiency / Power Factor
75% / 90%
Power Transfer Mechanism
Direct Drive
Bearing type
Permanently Sealed Ball Bearing
Sander
Sanding Belt Size
6” x 89”
Sanding Belt Speed
3900FPM
Sanding Belt Tilt
0° - 90°
Sanding Belt Oscillation Stroke
1/2"
Oscillations Per Minute
108
Sanding Belt Drum Material
Aluminum
Platen Construction
Steel with Graphite Coating
Platen Dimensions
32-1/2” x 7”
Table
Material
Precision Ground Cast Iron
Main Table Dimensions
29-3/4“(W) x 10”(D)
Main Table Height from Floor
37-3/4” – 40-3/4”
Miter Slot Type
T-Slot (Standard Size)
Miter Slot Size (W x H)
3/4” x 3/8”
Contour Sanding Table Dimensions
11-7/8”(W) X 9-7/8”(D)
Contour Sanding Table Height from Floor
37” – 40-1/2”
Fence Size
3” x 23-1/2”
Miter Gauge
Angle Range
-60° to 60°, with positive stops at -45°, 0°, 45°
Miter bar Length
8-3/4”
Safety
Number of Dust Ports
1
Dust Port Size
4”
Minimum CFM Required
650 CFM
Sound Rating @ 2’ distance
100 dB
Others
Serial Number Location
On the back of the machine stand.
Certification
CSA 175381
Country of Origin
Taiwan

6303 Sander OLIVERMACHINERY.NET 7|Page
Identification

8 | Page Oliver Machinery 6303 Sander
Safety
Oliver Machinery has made every attempt to provide a safe, reliable, easy-to-use piece of machinery.
Safety, however, is ultimately depending on the individual machine operator. Before operating this
machine, please become familiar with the following safety labels and guidelines.
DANGER
This indicate an imminent hazardous situation which, if not avoided, WILL cause
death or serious injury.
WARNING This means if the warning is not taken seriously, it CAN cause death or serious injury.
CAUTION This means if the precaution is not taken, it MAY cause minor or moderate injury.
IMPORTANT This is a tip about proper operation of the machine to avoid machine damage.
General Safety Guidelines
1. FAMILIARIZE yourself with all safety instructions found in this manual. Know the limitations and
hazards associated with this machine. Do not operate / service this machine until you are properly
trained.
2. ELECTRICAL GROUNDING, when done properly, reduce the risk of electrocution, shocks, and fire.
Make certain that the machine frame is electrically grounded and that a ground lead is included in the
incoming electrical service. In cases where a cord and a plug are used, make certain that the grounding
plug connects to a suitable ground. Follow the grounding procedure indicated in the electrical code
of your area.
3. DISCONNECT the machine from power before performing any service, maintenance, adjustments, or
when changing cutters. A machine under repair should be RED TAGGED to show it should not be used
until the maintenance is complete.
4. EYE PROTECTION: Always wear an approved safety face shield, goggles, or glasses that complies with
ANSI Z87.1 and CSA Z94.3 standards. Common eyeglasses are not safety glasses, and may not provide
adequate protection.
5. EAR PROTECTION: Use hearing protective devices where the noise exceeds the level of exposure
allowed in Section 1910.95 of the OSHA Regulations. When in doubt, use it.
6. OTHER PERSONAL PROTECTION: Before the operation, remove tie, rings, watch, and other jewelry.
Roll up sleeves above elbows. Remove all loose outer clothing and confine long hair. Protective
footwear should be used. Do not wear gloves unless it is instructed to perform particular step(s) in
the manual.
7. GUARDS: Keep machine guards in place for all applicable operations. If any guards are removed for
maintenance, DO NOT OPERATE the machine until all guards are reinstalled. Check clearance between
the guards and the cutter before starting the machine.
8. WORKPLACE SAFETY: Keep the floor around the machine clean. Scrap material, sawdust, oil, and
other liquids increase the risk of tripping or slipping. Be sure to clean up the table before starting the

6303 Sander OLIVERMACHINERY.NET 9|Page
machine. Make certain the work area is well lighted and that a proper exhaust system is used to
minimize dust. Use anti-skid floor strips on the floor area where the operator normally stands and
mark off the machine work area. Provide adequate workspace around the machine.
9. ACCESS CONTROL should be enforced so only trained personnel can access the work area and operate
the machine. Use childproof power switch when applicable.
10. STAY ALERT at all times. Do not operate this machine while under the influence of drugs/alcohol, or
when not feeling well.
11. NEVER STAND ON MACHINE. This prevents injuries from tipping related accidents and accidental
contacts with cutters.
12. REPLACEMENT PARTS: Use only genuine Oliver Machinery replacement parts and accessories
recommended for this machine. Generic parts made by other manufacturers may create a safety
hazard, and WILL void the factory warranty and other guarantees.
13. PROPER USE: Do not use this machine for other than its intended use. If used for other purposes,
Oliver Machinery disclaims any real or implied warranty and holds itself harmless for any injury or
damage which may result from that use.

10 | Page Oliver Machinery 6303 Sander
Safety Guidelines Specific to Sander
Before Work Begins:
1. Inspect the sanding belt for signs of failure. Replace damaged, overstretched, or worn sanding belts.
2. Ensure the sanding belt is tensioned.
3. Inspect the workpiece. Do not process workpieces with loose parts and/or containing dangerous
chemicals. Do not sand wood with high moisture content.
4. Ensure the table is positioned at least 1/16” above the bottom edge of the sanding belt.
5. Ensure the sanding belt guard and the table are locked into position.
When Sanding:
1. Maintain control of the workpiece. Hold the workpiece firmly with both hands and apply light
pressure against the sanding belt. Use the sander table, backstop, miter gauge, or fence to support
the workpiece in different operations.
2. Keep hands away from the sanding belt and other moving parts. Use special jigs to hold down small
workpieces as needed.
3. To avoid kickbacks and sanding belt damages, do not feed the workpiece with sharp corners pointing
against the moving direction of the sanding belt. Instead, sand the sharp corner by placing it at the
trailing position of the workpiece.
Correct Wrong
After Operation
1. STOP THE MACHINE when the operator leaves the machine for any reason.
2. WAIT until the motor comes to a complete stop.
3. CLEAN UP before departure.