American Sanders American 12 07044C User manual

Form No. 78150D 5/06 revised 3/10
READ THIS BOOK
This book has important information for the use and safe operation of this machine. Failure to read this
book prior to operating or attempting any service or maintenance procedure to your Clarke American
Sanders machine could result in injury to you or to other personnel; damage to the machine or to
other property could occur as well. You must have training in the operation of this machine before
using it. If operator(s) cannot read this manual, have it explained fully before attempting to operate
this machine.
Si Ud. o sus operadores no pueden leer el Inglés, se hagan explicar este manual completamente
antes de tratar el manejo o servicio de esta máquina.
All directions given in this book are as seen from the operator’s position at the rear of the machine.
American 12
Operator's Manual
Models: 07044C, 07108A, 07120A, 07049C, 07109A

Page 2 FORM NO. 78150D Clarke®American Sanders - American 12 Floor Sander Owner's Manual
Contents of this Book
Operator Safety Instructions........................................................ 3
Introduction and Machine Specifications..................................... 5
230V Electrical Connection Instructions...................................... 6
How to Transport the Machine..................................................... 7
Machine Set-Up........................................................................... 8
How to Operate the Machine..................................................... 10
Sanding Cuts and Sandpaper ................................................... 12
Sander Adjustment Procedures................................................. 14
Routine Maintenance................................................................. 16
Troubleshooting......................................................................... 17
SECTION II - Parts and Service Manual
Assembly Drawing #1................................................................ 20
Assembly Parts List #1........................................................... 21
Assembly Drawing #2................................................................ 22
Assembly Parts List #2........................................................... 23
Assembly Drawing #3................................................................ 24
Assembly Parts List #3 ............................................................ 25
Accessories Drawing & Parts List.............................................. 26
Wiring Diagram.......................................................................... 27
Chatter-Wave Prevention .......................................................... 28
WARNING!
The Products sold with this Manual contain or may contain chemicals that are known to certain governments (such as the State of
California, as identified in its Proposition 65 Regulatory Warning Law) to cause cancer, birth defects or other reproductive harm. In
certain locations (including the State of California) purchasers of these Products that place them in service at an employment job site
or a publicly accessible space are required by regulation to make certain notices, warnings or disclosures regarding the chemicals
that are or may be contained in the Products at or about such work sites. It is the purchaser’s responsibility to know the content of,
and to comply with, any laws and regulations relating to the use of these Products in such environments. The Manufacturer disclaims
any responsibility to advise purchasers of any specific requirements that may be applicable to the use of the Products in such
environments.
revised 3/10

Clarke®American Sanders - American 12 Floor Sander Operator's Manual FORM NO. 78150D Page 3
DANGER means: Severe bodily injury or death can occur to you or other personnel if the
DANGER statements found on this machine or in this Operator's Manual are
ignored or are not adhered to. Read and observe all DANGER statements
found in this Operator's Manual and on your machine.
WARNING means: Injury can occur to you or to other personnel if the WARNING statements
found on your machine or in this Operator's Manual are ignored or are not
adhered to. Read and observe all WARNING statements found in this
Operator's Manual and on your machine.
CAUTION means: Damage can occur to the machine or to other property if the CAUTION state-
ments found on your machine or in this Operator's Manual are ignored or are
not adhered to. Read and observe all CAUTION statements found in this
Operator's Manual and on your machine.
DANGER: Failure to read the Operator's Manual before operating or servicing this sanding equip-
ment could result in injury to the operator or to bystanders and could cause damage to
the equipment. Read and observe all safety statements found in this manual and on the
sanding equipment. Make sure all labels, decals, warnings, cautions and instructions are
fastened to the equipment. Replace any that are damaged or missing. You must have
training in the operation of this equipment before using it. If the operator is unable to
read this manual, have it explained fully before they attempt to use this equipment.
DANGER: Sanding/finishing wood floors can create an environment that can be explosive. The fol-
lowing safety procedures must be adhered to:
• Cigarette lighters, pilot lights and any other source of ignition can create an explosion
when active during a sanding session. All sources of ignition should be extinguished
or removed entirely if possible from the work area.
• Work areas that are poorly ventilated can create an explosive environment when
certain combustible materials are in the atmosphere, i.e., solvents, thinners, alcohol,
fuels, certain finishes, wood dust and other combustible materials. Floor sanding
equipment can cause flammable material and vapors to burn. Read the manufactur-
er's label on all chemicals used to determine combustibility. Keep the work area well
ventilated.
• Spontaneous combustion or an explosion can occur when working with sanding dust.
The sanding dust can self-ignite and cause injury or damage. Sanding dust should
be disposed of properly. Always empty the sanding dust into a metal container that is
located outside of any building(s).
• Remove the contents of the dust bag when the bag is 1/3 full. Remove the contents of
the dust bag each time you finish using the equipment. Never leave a dust bag unat-
tended with sanding dust in it.
• Do not empty the contents of the dust bag into a fire.
• Hitting a nail while sanding can cause sparks and create an explosion or fire. Always
use a hammer and punch to countersink all nails before sanding floors.
OPERATOR SAFETY INSTRUCTIONS
WARNING AVERTISSEMENT ADVERTENCIA

Page 4 FORM NO. 78150D Clarke®American Sanders - American 12 Floor Sander Owner's Manual
DANGER: Operating partially assembled sanding equipment could result in injury to the operator or by-
stander and could cause damage to the equipment or to other property.
• Do not operate this equipment unless it it fully assembled and all guards, doors and covers
are secured.
• Keep all fasteners tight.
• Keep all adjustments within manufacturers specifications.
DANGER: Moving parts on this sanding equipment can cause injury to the operator or bystanders.
• Keep hands, feet and loose clothing away from all moving parts.
• Do not change or adjust the abrasive while the sanding equipment is running.
• Do not service the sanding equipment while it is running.
DANGER: This sanding equipment requires a supply of electricity. Improper use could result in electrical
shock or fire.
• Connect only to an electrical source matching what is shown on the equipment nameplate.
• Do not use this sanding equipment on an ungrounded electrical circuit. Consult an electri-
cian if you suspect the circuit is not properly grounded.
• Do not use this sanding equipment with a damaged electrical cord. Inspect before each
use.
• Avoid striking the elelctrical cord with the abrasive. Always lift the electrical cord over the
sanding equipment.
• Do not use the electrical cord to move the sanding equipment.
• Disconnect the electrical source before servicing this equipment.
WARNING: In the event of a bag fire, injury can occur to the operator if the operator is tied or strapped to
equipment. Use operating belt properly ( follow procedure on page 11).
WARNING: Injury to the operator or bystander can occur if protective gear is not worn while sanding. Always
use eye, ear, and respiratory protection while performing any sanding operation.
WARNING: Bodily injury could occur if power is applied to the equipment with the power switch already in
the "ON" position. Always check to assure that the power switch is in the "OFF" position before
connecting power supply.
CAUTION: Maintenance and repairs performed by unauthorized personnel could result in damage or injury.
Maintenance and repairs performed by unauthorized personnel will void your warranty. Servicing
of this unit must always be referred to an authorized Clarke American Sanders distributor.
CAUTION: Use of this equipment to move other objects or to climb on could result in injury or damage. Do
not use this equipment as a step or furniture. Do not ride on this equipment.
CAUTION: Damage could occur to the equipment if not properly kept in a dry building for storage. Store
the equipment in a dry building.
CAUTION: The equipment is heavy. When transporting the equipment, remove the motor. Get help to lift
the equipment and motor.
CAUTION: Serious damage to the floor can occur if the sanding equipment is left running in one spot while
the sanding drum is in contact with the floor. To avoid damage to the floor, feather cut in at a
normal sanding rate. Do not dwell while lowering or raising the contact wheel. Always sand at
a constant rate.

Clarke®American Sanders - American 12 Floor Sander Operator's Manual FORM NO. 78150D Page 5
Introduction and Machine Specifications
Operating Controls
Operating Controls
Leveling Adjustment
Tool Storage Tray
Sanding Pressure Adjustment
Motor Starter / Protector
MODEL 07108A / (07044C) 07109A / (07049C) 07120A
Electrical Requirements ~208-240V 60 Hz ~220-240V 50 Hz ~220-240V 50 Hz
Amperage 15.7 11.8 11.8
Sound Emisson (Lpm) 83.0 dB(A) 79.4 dB(A) 79.4 dB(A)
Vibration <.30 in/s < 2.5 m/s2< 2.5 m/s2
Contact Wheel Rate (rpm) 2000/2400 1670/2000 1670/2000
Abrasive Rate 3800/4560 ft/min 970/1160 m/min 970/1160 m/min
Fan Flow Rate 280 CFM 110 liters/s 110 liters/s
Abrasive Sheet Size 12" x 26 1/8" 305mm x 664mm 305mm x 664mm
Motor 4 Hp Continuous 2.2 kW Continuous 2.2 kW Continuous
Overload Protection Magnetic Circuit Breaker Magnetic Circuit Breaker 13 A Fuse
Operating Controls Adjustable Lever/Grip Adjustable Lever/Grip Adjustable Lever/Grip
Leveling Controls Externally Adjustable Externally Adjustable Externally Adjustable
Electrical Cable 100' 10-3 SJO with 100' 12-3 SJO with 15m HO7RN-F3GI .5
L6-20P Plug AU2-15P Plug with UK1-13P Plug
Operating Wheels 80 Durometer 80 Durometer 80 Durometer
Clear Urethane (Steel) Clear Urethane (Steel) Clear Urethane
Weight 240 lbs. 204 lbs. 92.7 kg
Dimensions 40½ x 15 x 36 3/4 40½ x 15 x 36 3/4 103cm x 38cm x 93cm
CAUTION: Your equipment may be inappropriate on some installations. Some softer woods
used in flooring cannot support the pressure created by hard wheels.
Always consult with the flooring manufacturer on the proper installation, prepa-
ration, and finishing of their product. Determine suitability of your equipment in
preparing the product.